®
OfficeConnect Cable/DSL Router
User Guide
3CR858-91
http://www.3com.com/
Part No. DUA8589-1AAA01
Rev. 01
Published July 2004
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1 INTRODUCING THE ROUTER
OfficeConnect Cable/DSL Router 11
Router Advantages 13
Front Panel 14
2 HARDWARE INSTALLATION
Introduction 17
Safety Information 17
3 SETTING UP YOUR COMPUTERS
Obtaining an IP Address Automatically 21
Windows 2000 21
Windows XP 23
Windows 95/98/ME 23
Macintosh 23
Disabling PPPoE and PPTP Client Software 24
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NAT 79
Status and Logs 87
Status 87
Traffic Metering 88
Logs 88
Connecting to the Internet 92
Alert LED 93
The Internet Protocol Suite 99
Managing the Router over the Network 99
IP Addresses and Subnet Masks 99
How does a Device Obtain an IP Address and Subnet Mask? 101
DHCP Addressing 101
Static Addressing 101
Auto-IP Addressing 101
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E OBTAINING SUPPORT FOR YOUR PRODUCT
Register Your Product to Gain Service Benefits 111
Purchase Value-Added Services 111
Troubleshoot Online 111
Contact Us 112
Telephone Technical Support and Repair 112
F END USER SOFTWARE LICENSE AGREEMENT
GLOSSARY
REGULATORY NOTICES
INDEX
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ABOUT THIS GUIDE
This guide describes how to install and configure the OfficeConnect
Cable/DSL Router (3CR858-91).
This guide is intended for use by those responsible for installing and
setting up network equipment; consequently, it assumes a basic working
knowledge of LANs (Local Area Networks) and Internet Routers.
If a release note is shipped with the Cable/DSL Router and contains
information that differs from the information in this guide, follow the
information in the release note.
Most user guides and release notes are available in Adobe Acrobat
Reader Portable Document Format (PDF) on the 3Com World Wide Web
site:
http://www.3com.com
Naming Convention Throughout this guide, the OfficeConnect Cable/DSL Router is referred to
as the “Router”.
Category 3 and Category 5 Twisted Pair Cables are referred to as Twisted
Pair Cables throughout this guide.
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8
ABOUT THIS GUIDE
Conventions
Table 1 and Table 2 list conventions that are used throughout this guide.
Table 1 Notice Icons
Icon
Notice Type
Description
Information note Information that describes important features or
instructions.
Caution
Warning
Information that alerts you to potential loss of data or
potential damage to an application, system, or device.
Information that alerts you to potential personal
injury.
Table 2 Text Conventions
Convention
Description
The words “enter”
and “type”
When you see the word “enter” in this guide, you must type
something, and then press Return or Enter. Do not press
Return or Enter when an instruction simply says “type.”
Keyboard key names If you must press two or more keys simultaneously, the key
names are linked with a plus sign (+). Example:
Press Ctrl+Alt+Del
Words in italics
Italics are used to:
■
Emphasize a point.
■
Denote a new term at the place where it is defined in the
text.
■
Identify menu names, menu commands, and software
button names. Examples:
From the Help menu, select Contents.
Click OK.
Feedback about this Your suggestions are very important to us. They will help make our
User Guide documentation more useful to you. Please e-mail comments about this
document to 3Com at:
Please include the following information when commenting:
■
■
■
Document title
Document part number (on the title page)
Page number (if appropriate)
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Conventions
9
Example:
■
■
■
OfficeConnect Cable/DSL Router User Guide
Part Number DUA8589-1AAA01
Page 24
Do not use this e-mail address for technical support questions. For
information about contacting Technical Support, please refer to
Appendix E “Obtaining Support for your Product”.
Related In addition to this guide, each Router document set includes one
Documentation Installation Guide. This guide contains the instructions you need to install
and configure your Router.
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10
ABOUT THIS GUIDE
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INTRODUCING THE ROUTER
1
Welcome to the world of networking with 3Com®. In the modern
business environment, communication and sharing information is crucial.
Computer networks have proved to be one of the fastest modes of
communication but, until recently, only large businesses could afford the
networking advantage.
OfficeConnect
Cable/DSL Router
The OfficeConnect Cable/DSL Router is designed to provide a
cost-effective means of sharing a single broadband Internet connection
“firewall” that protects your network using Stateful Packet Inspection
(SPI) to detect intruders and prevent them from seeing your files or
damaging your computers. The Router can also prevent your users from
accessing Web sites which you find unsuitable. This completely equipped,
Cable/DSL Router also features Virtual Private Network (VPN) initiation
and termination, allowing encrypted links to other private networks.
The example in Figure 1 shows a network without a Router where only
one computer is connected to the Internet. This computer must always
be powered on for the other computers on the network to access the
Internet.
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12
CHAPTER 1: INTRODUCING THE ROUTER
Figure 1 Example Network Without a Router
When you use the Router in your network (Figure 2), it becomes your
connection to the Internet. Connections can be made directly to the
Router, or to an OfficeConnect Switch or Hub, expanding the number of
computers you can have in your network.
Figure 2 Example Network Using a Cable/DSL Router
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Router Advantages
13
Router Advantages
The advantages of the Router include:
■
■
■
Shared Internet connection for wired computers. The Cable/DSL
Router also provides shared internet connection
No need for a dedicated, “always on” computer serving as your
Internet connection
Cross-platform operation for compatibility with Windows, Unix and
Macintosh computers
■
■
■
Easy-to-use, Web-based setup and configuration
Provides centralization of all network address settings (DHCP)
Acts as a Virtual server to enable remote access to Web, FTP, and other
services on your network
■
Security - Firewall protection against Internet hacker attacks and
encryption to protect network traffic
Package Contents
The Router kit includes the following items:
■
■
■
■
■
One OfficeConnect Cable/DSL Router
One power adapter for use with the Router
Four rubber feet
One Ethernet cable
One CD-ROM containing the Router Discovery program and this User
Guide
■
■
■
Installation Guide
One Support and Safety Information Sheet
One Warranty Flyer
If any of these items are missing or damaged, please contact your retailer.
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14
CHAPTER 1: INTRODUCING THE ROUTER
Minimum System
and Component
Requirements
Your Router requires that the computer(s) and components in your
network be configured with at least the following:
■
A computer with an operating system that supports TCP/IP
networking protocols (for example Windows 95/98/NT/Me/2000/XP,
Unix, Mac OS 8.5 or higher).
■
■
An Ethernet 10Mbps or 10/100 Mbps NIC for each computer to be
connected to the four-port switch on your Router.
A cable or DSL broadband connection to the Internet, with a suitable
modem. The modem must have an Ethernet port for connection to
your Router.
■
A Web browser that supports JavaScript, such as Netscape 4.7 or
higher, Internet Explorer 5.0 or higher, or Mozilla 1.2.1 or higher.
Front Panel
The front panel of the Router contains a series of indicator lights (LEDs)
that help describe the state of various networking and connection
operations.
Figure 3 Router - Front Panel
1
2
3
4
1 Alert LED
Orange
Indicates a number of different conditions, as described below.
Off - The Router is operating normally.
Flashing quickly - Indicates one of the following conditions:
■
■
■
The Router has just been started up and is running a self-test routine,
or
The administrator has invoked the Reset to Factory Defaults
command, or
The system software is in the process of being upgraded
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Front Panel
15
In each of these cases, wait until the Router has completed the current
Flashing slowly - The Router has completed the Reset to Factory Defaults
process, and is waiting for you to reset the unit. To do this, remove
power, wait 10 seconds and then re-apply power. The Router will then
enter the start-up sequence and resume normal operation.
If you have used a cable to reset the unit to Factory Defaults, refer to
“Forgotten Password and Reset to Factory Defaults” on page 93.
On for 2 seconds, and then off - The Router has detected and prevented
a hacker from attacking your network from the Internet.
Continuously on - A fault has been detected with your Router during the
start-up process. Refer to Chapter 6 “Troubleshooting”.
2 Power LED
Green
3 Four LAN Status LEDs
Green (100Mbps link) / yellow (10Mbps link)
If the LED is on, the link between the port and the next piece of network
equipment is OK. If the LED is flashing, the link is OK and data is being
transmitted or received. If the LED is off, nothing is connected, the
connected device is switched off, or there is a problem with the
automatically adjust to the correct speed and duplex.
4 Cable/DSL Status LED
Green (100Mbps link) / yellow (10Mbps link)
If the LED is on, the link between the Router and the cable or DSL modem
is OK. If the LED is flashing, the link is OK and data is being transmitted or
received. If the LED is off, nothing is connected, the modem is switched
off or there is a problem (refer to Chapter 6 “Troubleshooting”).
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16
CHAPTER 1: INTRODUCING THE ROUTER
Rear Panel
The rear panel (Figure 4) of the Router contains four LAN ports, one
Ethernet Cabler/DSL port, and a power adapter socket.
Figure 4 Router - Rear Panel
5 8
6
7
5 Power Adapter Socket
Only use the power adapter supplied with this Router. Do not use any
other adapter.
6 Ethernet Cable/DSL port
Use the supplied patch cable to connect the Router to the Ethernet port
on your cable or DSL modem. The port will automatically adjust to the
correct speed and duplex.
7 Four 10/100 LAN ports
Using suitable RJ-45 cable, you can connect your Router to a computer,
or to any other piece of equipment that has an Ethernet connection (for
example, a hub or a switch). The LAN ports are configured as MDIX, for
connection to a computer with a straight through RJ-45 cable.
8 Power Adapter OK LED
Green
Indicates that the power adapter is supplying power to the Router. If the
LED is off, there may be a problem with the power adapter or adapter
cable.
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HARDWARE INSTALLATION
2
Introduction
including:
■
“Positioning the Router”.
“Connecting the Router”.
■
Safety Information
WARNING: Please read the “Safety Information” section in Appendix D
before you start.
VORSICHT: Bitte lesen Sie den Abschnitt “Wichtige Sicherheitshinweise”
sorgfältig durch, bevor Sie das Gerät einschalten.
AVERTISSEMENT: Veuillez lire attentivement la section “Consignes
importantes de sécurité” avant de mettre en route.
Positioning the
Router
You should place the Router in a location that:
■
is conveniently located for connection to the telephone socket.
■
allows convenient connection to the computers that will be connected
to the four LAN ports on the rear panel, if desired.
■
allows easy viewing of the front panel LED indicator lights, and access
to the rear panel connectors, if necessary.
When positioning your Router, ensure:
■
■
It is out of direct sunlight and away from sources of heat.
Cabling is away from power lines, fluorescent lighting fixtures, and
sources of electrical noise such as radios, transmitters and broadband
amplifiers.
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18
CHAPTER 2: HARDWARE INSTALLATION
■
■
Water or moisture cannot enter the case of the unit.
Air flow around the unit and through the vents in the side of the case
is not restricted. 3Com recommends you provide a minimum of
25 mm (1 in.) clearance.
Using the Rubber Use the four self-adhesive rubber feet to prevent your Router from
Feet moving around on your desk or when stacking with flat top units. Only
stick the feet to the marked areas at each corner of the underside of your
Router.
Wall Mounting
There are two slots on the underside of the Router that can be used for
wall mounting.
When wall mounting the unit, ensure that it is within reach of the power
outlet.
You will need two suitable screws to wall mount the unit. To do this:
1 Ensure that the wall you use is smooth, flat, dry and sturdy and make two
screw holes which are 150 mm (5.9 in.) apart.
2 Fix the screws into the wall, leaving their heads 3 mm (0.12 in.) clear of
the wall surface.
3 Remove any connections to the unit and locate it over the screw heads.
When in line, gently push the unit on to the wall and move it downwards
to secure.
When making connections, be careful not to push the unit up and off the
wall.
CAUTION: Only wall mount single units, do not wall mount stacked
units.
Connecting the
Router
To power up your Router, and then connect it to your modem and to a
computer, do the following:
1 Plug the power adapter into the power adapter socket located on the
back panel of the Router.
2 Plug the power adapter into a standard electrical wall socket. Wait for the
Alert LED to stop flashing.
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Connecting the Router
19
3 Ensure that your modem and computer are both switched on.
4 Use the supplied cable to connect the Router’s Ethernet Cable/DSL port to
the modem. Check that the Cable/DSL Status LED lights.
5 Connect your computer to one of the 10/100 LAN ports on the Router.
Check that the LAN Status LED for the port lights green.
See Figure 5 for an example configuration.
Figure 5 Connecting the Router
Your existing
Cable/DSL
Internet
Modem
OfficeConnect
Cable/DSL Router
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/D
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Alert
OfficeConnect
Switch
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20
CHAPTER 2: HARDWARE INSTALLATION
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SETTING UP YOUR COMPUTERS
3
The Router has the ability to dynamically allocate network addresses to
the computers on your network, using DHCP. However, your computers
need to be configured correctly for this to take place. To change the
configuration of your computers to allow this, follow the instructions in
this chapter.
Obtaining an IP
Address
Automatically
Follow the instructions for your particular operating system to ensure that
your computers are configured to obtain an IP address automatically.
Windows 2000 If you are using a Windows 2000-based computer, use the following
1 From the Windows Start Menu, select Settings > Control Panel.
2 Double click on Network and Dial-Up Connections.
3 Double click on Local Area Connection.
4 Click on Properties.
5 A screen similar to Figure 6 should be displayed. Select Internet Protocol
TCP/IP and click on Properties.
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22
CHAPTER 3: SETTING UP YOUR COMPUTERS
Figure 6 Local Area Properties Screen
6 Ensure that the options Obtain an IP Address automatically, and Obtain
DNS server address automatically are both selected as shown in Figure 7.
Click OK.
Figure 7 Internet Protocol (TCP/IP) Properties Screen
7 Restart your computer.
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Obtaining an IP Address Automatically
23
Windows XP If you are using a Windows XP computer, use the following procedure to
change your TCP/IP settings:
1 From the Windows Start menu, select Control Panel.
2 Click on Network and Internet Connections.
3 Click on the Network Connections icon.
4 Double click on LAN or High Speed Connection icon. A screen titled Local
Area Connection Status will appear.
5 Select Internet Protocol TCP/IP and click on Properties.
6 Ensure that the options Obtain an IP Address automatically, and Obtain
DNS servers automatically are both selected. Click OK.
7 Restart your computer.
Windows 95/98/ME If you are using a Windows 95/98/ME computer, use the following
procedure to change your TCP/IP settings:
1 From the Windows Start Menu, select Settings > Control Panel.
2 Double click on Network. Select the TCP/IP item for your network card
and click on Properties.
3 In the TCP/IP dialog, select the IP Address tab, and ensure that Obtain IP
address automatically is selected. Click OK.
Macintosh If you are using a Macintosh computer, use the following procedure to
change your TCP/IP settings:
1 From the desktop, select Apple Menu, Control Panels, and TCP/IP.
2 In the TCP/IP control panel, set Connect Via: to “Ethernet”.
3 In the TCP/IP control panel, set Configure: to “Using DHCP Server.”
4 Close the TCP/IP dialog box, and save your changes.
5 Restart your computer.
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24
CHAPTER 3: SETTING UP YOUR COMPUTERS
Disabling PPPoE
and PPTP Client
Software
If you have PPPoE client software installed on your computer, you will
need to disable it. To do this:
1 From the Windows Start menu, select Settings > Control Panel.
2 Double click on Internet Options.
3 Select the Connections Tab. A screen similar to Figure 8 should be
displayed.
4 Select the Never Dial a Connection option.
Figure 8 Internet Properties Screen
You may wish to remove the PPPoE client software from your computer
to free resources, as it is not required for use with the Router.
Disabling Web
Proxy
Ensure that you do not have a web proxy enabled on your computer.
Go to the Control Panel and click on Internet Options. Select the
Connections tab and click LAN Settings at the bottom. Make sure that
the Use Proxy Server option is unchecked.
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RUNNING THE SETUP WIZARD
4
Accessing the
Wizard
The Router setup program is Web-based, which means that it is accessed
through your Web browser (Netscape Navigator or Internet Explorer).
To use the Setup Wizard:
1 Ensure that you have at least one computer connected to the Router.
Refer to Chapter 2 for details on how to do this.
2 Launch your Web browser on the computer.
3 Enter the following URL in the location or address field of your browser:
http://192.168.1.1 (as shown in Figure 9).
Figure 9 Web Browser Location Field (Factory Default)
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26
CHAPTER 4: RUNNING THE SETUP WIZARD
The Login screen displays (Figure 10).
Figure 10 Router Login Screen
4 Log in by typing the administrator password (the default password is
admin) in the System Password field, and clicking Log in.
Be sure to bookmark this screen for easy reference if you should want to
change the Router settings.
The Wizard will attempt to launch automatically, but if it fails, select
Setup Wizard from the main menu.
5 You will be guided step by step through a basic setup procedure,
described in the following sections. At any time, click Next to move to the
next screen, click Back to return to the previous screen, or click Cancel to
exit the Wizard.
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Accessing the Wizard
27
Password Figure 11 Admin Password Screen
In the Admin Password screen (Figure 11)
1 Type the Current Password.
2 Type a new password in both the New Password and Confirm New
Password boxes.
3 Type in a Login Timeout. This is the amount of time you want the Router
to remain inactive before it returns to the login screen.
3Com recommends entering a new password when setting up the Router
for the first time. The Router is shipped from the factory with a default
password, admin.
The Password is case sensitive. Write the new password down and keep it
in a safe place, so that you can change your settings in the future.
4 Click Next to display the Time Zone setup screen (Figure 12).
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28
CHAPTER 4: RUNNING THE SETUP WIZARD
Time Zone Figure 12 Time Zone Screen
The Router keeps time by connecting to a Simple Network Time Protocol
(SNTP) server. This allows the Router to synchronize the system clock to
the Internet. The synchonized clock in the Router is used to record the
security log. To set the time zone for your Router, do the following:
1 Select the Base Date and Base Time. The Router will use these settings if it
is unable to connect to the Internet or SNTP Server.
2 To enable SNTP, check the Using Time Server (NTP) check box.
3 Select a time zone from the Set Time Zone drop down list.
4 Enter the interval, in hours, at which to want the Router to resynchonize
with the SNTP Server, at the Synchonization Interval text box. The default
is every 24 hours.
5 Select a primary SNTP server, and if required a secondary SNTP server
from the appropriate drop down boxes.
6 If you want to enable aylight saving, check the Daylight Savings check
box.
7 Select the month and day that you want daylight savings to begin at Start
Time, and select the month and day that you want daylight davings to
end at End Time.
The Daylight Savings option advances the system clock by one hour
between the dates that you specify in the Start Time and End Time drop
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Accessing the Wizard
29
down lists. It does not cause the system clock to be updated for daylight
savings time automatically.
8 Click Next to display the Connection Type screen.
Connection Type Figure 13 Connection Type Screen
of Internet connection you have. Before setting up your Internet
ready.
■
■
■
■
■
Dynamic IP Address — see page 30.
PPPoE (typically DSL users only) — see page 31.
L2TP (supported by some ISPs) — see page 32.
Static IP Address — see page 34.
and click Next.
For further information on selecting a mode see “Internet Settings” on
page 42.
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30
CHAPTER 4: RUNNING THE SETUP WIZARD
Dynamic IP Address Mode
Figure 14 Dynamic IP Screen
1 Some ISPs require a host name. If your ISP has this requirement, enter the
host name in the Host Name text box .
2 Either:
■
If your ISP requires an assigned MAC address, enter the values for a
MAC address. Or,
■
If the computer you are now using is the one that was previously
connected directly to the cable modem, select Clone.
3 Click Next. The DNS screen displays. Refer to “DNS” on page 35.
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Accessing the Wizard
31
PPPoE Mode
Figure 15 PPPoE Interface Screen
To setup the Router for use with a PPP over Ethernet (PPPoE) connection,
do the following:
1 Enter your PPP over Ethernet user name in the User Name text box.
2 Enter your PPP over Ethernet password in the Password text box and
enter it again in the Retype Password text box.
3 If required, enter your PPP over Ethernet service name in the Service
Name text box. This is optional. Not all ISPs require a PPPoE service name.
Do not enter anything in this box if your ISP does not require a service
name.
4 Enter the MTU value supplied by your ISP in the MTU text box. If your ISP
has not supplied an MTU value, leave this at the default value. The
default is 1454.
5 Check all of your settings, and then click Next. The DNS screen displays
Refer to “DNS” on page page 35.
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32
CHAPTER 4: RUNNING THE SETUP WIZARD
PPTP Mode
Figure 16 PPTP Screen
To setup the Router for use with a PPTP connection, use the following
procedure:
1 Enter your PPTP server address in the PPTP Server Address text box.
2 Enter your PPTP user name in the User ID text box.
3 Enter your PPTP password in the Password text box, and enter it again in
the Retype Password text box.
4 Type in an Idle Timeout. This is the amount of time you want the PPTP
Server to remain inactive before the session is ended.
5 Either:
■
Check the Get IP by DHCP check box if you want to obtain the IP
information from a DHCP Server on the network, or
■
If your ISP has provided you with IP address information, enter the IP
Address, Subnet Mask and Default Gateway in the text boxes
provided.
6 Check all of your settings, and then click Next. The DNS screen displays.
Refer to “DNS” on page 35.
L2TP
L2TP is supported by some Internet Service Providers (ISPs). Check with
your ISP to make sure L2TP is supported before using this screen.
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Accessing the Wizard
33
Figure 17 L2TP Screen
To setup the Router for use with an L2TP connection, do the following:
1 Enter your L2TP server address in the L2TP Server text box.
2 Enter your L2TP user name in the User ID text box.
3 Enter your L2TP password in the Password text box, and enter it again in
the Retype Password text box.
4 Type in an Idle Timeout. This is the amount of time you want the L2TP
Server to remain inactive before the session is ended.
5 Either:
■
Check the Get IP by DHCP check box if you want to obtain the IP
information from a DHCP Server on the network, or
■
If your ISP has provided you with IP address information, enter the IP
Address, Subnet Mask and Default Gateway in the text boxes
provided.
6 Check all of your settings, and then click Next. The DNS screen displays.
Refer to “DNS” on page page 35.
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34
CHAPTER 4: RUNNING THE SETUP WIZARD
Static IP Mode
Figure 18 Static IP Mode Screen
1 Enter the IP Address provided by your ISP in the IP Address assigned by
your Service Provider text box.
2 Enter the Subnet Mask provided by your ISP in the Subnet Mask text box.
3 Enter the Gateway Address provided by your ISP in the Service Provider
Gateway Address text box.
4 Check all of your settings, and then click Next.
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Accessing the Wizard
35
DNS Figure 19 DNS Screen
To set up the Domain Name Server (DNS) information for your Router, do
the following:
1 Either:
Check the Automatic from ISP check box. Or,
■
■
If your ISP has provided you with a specific DNS address to use type
the DNS Address in the text box.
Optionally, you can type a Secondary DNS Address in the appropriate
text box. Leave this box blank if your ISP has not supplied a secondary
address.
2 Click Next to display the Hostname and MAC Address screen.
If you selected the Dynamic IP Address option earlier in the Wizard, the
LAN Settings screen now displays. Go to “LAN Settings” on page 37.
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36
CHAPTER 4: RUNNING THE SETUP WIZARD
Hostname and MAC Figure 20 Hostname and MAC Address Screen
Address
1 Some ISPs require a host name. If your ISP has this requirement, enter the
host name in the Host Name text box.
2 Either:
■
■
■
If your ISP requires an assigned MAC address, enter the values for a
MAC address. Or,
If the computer you are now using is the one that was previously
connected directly to the cable modem, select Clone. Or,
To reset the MAC Address to the default, select Reset MAC.
3 Click Next to display the LAN Settings screen.
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Accessing the Wizard
37
LAN Settings Figure 21 LAN Settings Screen
LAN Configuration
This section of the screen displays a suggested LAN IP Address and
Subnet Mask for the Router. It also allows you to change the IP address
and subnet mask.
DHCP Server Parameters
The Router contains a Dynamic Host Configuration (DHCP) server that
can automatically configure the TCP/IP settings of every computer on
your network. To set up the DHCP Server, do the following:
1 Activate the DHCP Server by clicking the On radio button.
2 Specify an IP Pool range in the IP Pool Start Address and IP Pool End
Address text boxes. The largest available continuous IP pool will be
automatically entered. If this is not appropriate, make the required
changes.
3 Specify the DHCP Lease time by selecting the required value from the
Lease Time drop down list. The lease time is the length of time the DHCP
server will reserve the IP address for each computer.
4 If required, enter a Local Domain Name.
5 If you use 3Com NBX telephones, enter the IP address of the NBX call
processor at 3Com NBX Call Processor.
6 Click Next to display the Configuration Summary screen.
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CHAPTER 4: RUNNING THE SETUP WIZARD
Configuration Figure 22 Configuration Summary Screen
Summary
When you complete the Setup Wizard, a configuration summary displays.
save your settings. 3Com recommends that you print this page for your
records.
If you have made changes to the LAN Settings, you may need to
reconfigure the computer you are using in order to make contact with
the Router again.
Your Router is now configured and ready for use. See Chapter 5 for a
detailed description of the Router configuration screens.
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ROUTER CONFIGURATION
5
Navigating
This chapter describes all the screens available through the Router
default URL is http://192.168.1.1 but if you changed the Router
LAN IP address during initial configuration, use the new IP address
instead. When you have browsed to the Router, log in using your system
password (default password is admin).
Through the Router
Configuration
Pages
Main Menu At the left side of all screens is a main menu, as shown in Figure 23 on
page 40. When you click on a topic from the main menu, that screen
displays . Some main menu topics, for example Firewall, also display a
sub-menu; when you click on a sub-menu topic, that screen displays.
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CHAPTER 5: ROUTER CONFIGURATION
Figure 23 Main menu and Firewall sub-menu
LAN Settings
Your Router is equipped with a DHCP server that will automatically assign
IP addresses to each computer on your network. The factory default
settings for the DHCP server will work in most applications. If you need to
make changes to the settings, you can do so.
The changes that you can make are:
■
Change the Internal IP address of the Router. The default is
192.168.1.1
■
■
Change the Subnet Mask. The default is 255.255.255.0
Enable or Disable the DHCP Server Function. By default, DHCP is On
(Enabled)
■
Specify the Start and End IP Pool Address. The default is for the
■
■
■
Specify the IP address Lease Time. The default is half day
If required, specify a local Domain Name
If you use 3Com NBX telephones, specify an NBX call processor
The Router also provides you with a list of all client computers connected
to the network. You can manage this list as described in “DHCP Clients
List” on page 42.
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LAN Settings
41
To configure the LAN Settings:
1 Select LAN Settings from the main menu to display the LAN Settings
screen (Figure 24).
Figure 24 LAN Settings screen
2 Specify the Router IP Address and Subnet Mask in the appropriate fields.
The default IP address of the Router is 192.168.1.1.
3 If you want to use the Router as a DHCP Server, select the On radio
button.
4 If you need to, you can change the range of addresses allocated by the
Router, by changing the IP Pool Start Address and IP Pool End Address
text boxes.
5 Specify the DHCP Lease time by selecting the required value from the
Lease Time drop down list. The lease time is the length of time the DHCP
server will reserve the IP address for each computer
6 If required, specify the Local Domain Name for your network.
7 If you use 3Com NBX telephones, enter the IP address of the NBX call
processor at 3Com NBX Call Processor.
8 Either click Apply to save these settings, or go to DHCP Clients List if you
want to manage the DHCP clients.
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CHAPTER 5: ROUTER CONFIGURATION
DHCP Clients List
The DHCP Clients List provides details on the devices that have received IP
addresses from the Router. The list is only created when the Router is set
up as a DHCP server. For each device that is connected to the LAN the
following information is displayed:
■
IP address — The Internet Protocol (IP) address issued to the client
machine.
■
■
Host Name — The client machine’s host name, if configured.
MAC Address — The Media Access Control (MAC) address of the
client’s network card.
From this screen, you can do the following:
■
■
■
In the table, check the Fix text box to permanently fix the IP address.
In the table, click release to release the displayed IP address.
Click New to allocate an IP address to a MAC address.
As you connect more devices, the client list will grow to a maximum
number of 253 clients.
Internet Settings
Before you can configure the Router, you need to know the IP
information allocation method used by your ISP. There are five different
ways that ISPs can allocate IP information, as described below:
Dynamic IP Address (DSL or Cable)
Dynamic IP addressing (or DHCP) automatically assigns the Router IP
information. This method is popular with Cable providers. This method is
also used if your modem has a built in DHCP server.
PPPoE (DSL only)
If the installation instructions that accompany your modem ask you to
install a PPPoE client on your PC, then select this option. To configure the
Router you will need to know the following:
■
■
■
■
Username
Password
Service Name (if required by your ISP)
MTU (if supplied by your ISP)
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Internet Settings
43
When you install the Router, you will not need to use the PPPoE software
on your PC.
PPTP (DSL or Cable)
PPTP is only used by some European providers. If the installation
instructions that accompany your modem ask you to setup a dialup
connection using a PPTP VPN tunnel then select this option. To configure
the Router you will need to know the following:
■
■
■
Username
Password
VPN Server address (usually your modem)
When you install the Router, you will not need to use the dialup VPN on
your PC anymore.
L2TP (DSL or Cable)
L2TP is supported by some Internet Service Providers (ISPs). Check with
your ISP to make sure L2TP is supported before selecting this option. To
configure the Router you will need to know the following:
■
■
■
Username
Password
L2TP Server address
Static IP Address (DSL or Cable)
The ISP provides the IP addressing information for you to enter manually.
To configure the Router you will need to know the following:
■
■
■
IP Address
Subnet Mask
ISP Gateway Address
These screens enable you to edit the settings that you configured using
the Setup Wizard.
Connection to ISP Before beginning this section, ensure you have the required information
from your ISP.
Select Internet Settings from the main menu to display the Internet
Settings screen. Then, select an IP allocation mode from the following:
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CHAPTER 5: ROUTER CONFIGURATION
■
■
■
■
■
Dynamic IP Address (automatically allocated) — see page 44.
PPPoE (used by DSL providers only) — see page 45
PPTP (used by some European providers) — see page 46
L2TP (supported by some ISPs) — see page 47
Static IP Address (to be specified manually) — see page 48
Dynamic IP Address
To configure the dynamic IP address connection for your Router:
1 Select Dynamic IP Address and then click Next. The Dynamic IP Screen
displays (see Figure 25).
Figure 25 Internet Settings - Dynamic IP Screen
2 Some ISPs require a host name. If your ISP has this requirement, enter the
host name in the Host Name text box .
3 Either:
■
If your ISP requires an assigned MAC address, enter the values for a
MAC address. Or,
■
If the computer you are now using is the one that was previously
connected directly to the cable modem, select Clone.
4 Check all of your settings and then click Apply.
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Internet Settings
45
PPPoE
To configure the PPPoE connection for your Router:
1 Select PPPoE and then click Next. The PPPoE Interface screen displays (see
Figure 26).
Figure 26 Internet Settings - PPPoE Interface Screen
2 Enter your PPP over Ethernet user name in the User Name text box.
3 Enter your PPP over Ethernet password in the Password text box and
enter it again in the Retype Password text box.
4 If required, enter your PPP over Ethernet service name in the Service
Name text box. This is optional. Not all ISPs require a PPPoE service name.
Do not enter anything in this box if your ISP does not require a service
name.
5 Enter the MTU value supplied by your ISP in the MTU text box. If your ISP
has not supplied an MTU value, leave this at the default value. The
default is 1454.
6 Type in an Idle Timeout. This is the amount of time you want the PPPoE
Server to remain inactive before the session is ended.
7 If you want to automatically reconnect to the server after timeout, check
the Auto Reconnect After Timeout check box.
8 Check all of your settings, and then click Apply.
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CHAPTER 5: ROUTER CONFIGURATION
PPTP
To configure the PPTP connection for your Router:
1 Select PPTP and then click Next. The PPTP screen displays (see Figure 27).
Figure 27 Internet Settings - PPTP Screen
2 Enter your PPTP server address in the PPTP Server Address text box.
3 Enter your PPTP user name in the User ID text box.
4 Enter your PPTP password in the Password text box, and enter it again in
the Retype Password text box.
5 Type in an Idle Timeout. This is the amount of time you want the PPTP
Server to remain inactive before the session is ended.
6 Either:
■
Check the Get IP by DHCP check box if you want to obtain the IP
information from a DHCP Server on the network.
With this check box enabled, you can click Release to release the WAN
IP Address for the Router, or click Renew to renew the current WAN IP
Address, using DHCP.
Or:
■
If your ISP has provided you with IP address information, enter the IP
Address, Subnet Mask and Default Gateway in the text boxes
provided, or
7 Check all of your settings, and then click Apply.
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Internet Settings
47
L2TP
Check with your ISP to make sure they support L2TP.
To configure the L2TP connection for your Router:
1 Select L2TP and then click Next. The L2TP screen displays (see Figure 28).
Figure 28 Internet Settings - L2TP Screen
2 Enter your L2TP server address in the L2TP Server text box.
3 Enter your L2TP user name in the User ID text box.
4 Enter your L2TP password in the Password text box, and enter it again in
the Retype Password text box.
5 Type in an Idle Timeout. This is the amount of time you want the L2TP
Server to remain inactive before the session is ended.
6 Either:
■
Check the Get IP by DHCP check box if you want to obtain the IP
information from a DHCP Server on the network.
With this check box enabled, you can click Release to release the WAN
IP Address for the Router, or click Renew to renew the current WAN IP
Address, using DHCP.
■
If your ISP has provided you with IP address information, enter the IP
Address, Subnet Mask and Default Gateway in the text boxes
provided.
7 Check all of your settings, and then click Apply.
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CHAPTER 5: ROUTER CONFIGURATION
Static IP Address
To configure a Static IP Address for your Router:
1 Select Static IP Address and then click Next. The Static IP Address screen
displays (see Figure 29).
Figure 29 Internet Settings - Static IP Screen
2 Enter the IP Address provided by your ISP in the IP Address assigned by
your Service Provider text box.
3 Enter the Subnet Mask provided by your ISP in the Subnet Mask text box.
4 Enter the Gateway Address provided by your ISP in the Service Provider
Gateway Address text box.
Check all of your settings, and then click Apply.
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Internet Settings
49
DNS To configure the Domain Name Server (DNS) information for your Router,
do the following:
1 Select Internet Settings, then from the sub-menu select DNS. The DNS
screen displays (see Figure 30).
Figure 30 Internet Settings - DNS Screen
1 Either:
■
Check the Automatic from ISP check box. Or,
■
If your ISP has provided you with a specific DNS address to use, or you
chose Static IP Address in the Internet Settings screen, type the DNS
Address in the text box.
Optionally, you can type a Secondary DNS Address in the appropriate
text box. Leave this box blank if your ISP has not supplied a secondary
address.
2 Click Apply to save your settings.
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CHAPTER 5: ROUTER CONFIGURATION
Hostname & MAC To configure the Hostname and MAC Address information for your
Router, do the following:
1 Select Internet Settings, then from the sub-menu select Hostname &
MAC. The Hostname and MAC Address screen displays (see Figure 31).
Figure 31 Internet Settings - Hostname and MAC Address Screen
1 Some ISPs require a host name. If your ISP has this requirement, enter the
host name in the Host Name text box.
2 Either:
■
■
■
If your ISP requires an assigned MAC address, enter the values for a
WAN MAC address. Or,
If the computer you are now using is the one that was previously
connected directly to the cable modem, select Clone. Or,
To reset the MAC Address to the default, select Reset MAC.
3 Click Apply to save the settings.
Firewall
Use the Firewall menu option to enable and disable the firewall, and to
configure the following firewall functions
■
SPI (Stateful Packet Inspection) — SPI inspects packets at the
application layer, maintains TCP and UDP session information, and
detects and prevents certain types of network attacks such as DoS
attacks. See “SPI” on page 51.
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Firewall
51
■
■
■
Special Applications — Special Applications allows you to specify ports
to be open for specific applications to work properly with the Network
Address Translation (NAT) feature of the Router. See “Special
Applications” on page 54.
Virtual Servers — This function enables you to route external (Internet)
calls for services such as a web server, FTP server, or other applications
through your Router to your internal network. See “Virtual Servers”
Client IP Filters — You can configure the Router to restrict access to
the Internet, e-mail or other network services at specific days and
times. Restriction can be set for a single computer, a range of
■
■
MAC Address Filtering — This is a powerful security feature that
allows you to specify which computers are allowed on the network.
See “MAC Address Filtering” on page 62.
DMZ (De-Militarized Zone) — If you have a client PC that cannot run
an Internet application properly from behind the firewall, you can use
DMZ to open the client up to unrestricted two-way Internet access.
See “DMZ” on page 63.
CAUTION: DMZ reduces network security, and 3Com recommends you
only use it on a temporary basis.
SPI Stateful Packet Inspection (SPI) inspects, and if required blocks packets at
the application layer. SPI also maintains TCP and UDP session information,
including timeouts and the number of active sessions, and provides the
ability to detect and prevent certain types of network attacks such as DoS
attacks.
Denial of Service (DoS) attacks are aimed at devices and networks with a
connection to the Internet. The goal is not to steal information, but to
disable a device or network so users no longer have access to network
resources.
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CHAPTER 5: ROUTER CONFIGURATION
To configure SPI information on your Router:
1 Select Firewall from the main menu, then select SPI from the sub-menu to
display the SPI screen (Figure 32 and Figure 33):
Figure 32 SPI Screen - upper section
Figure 33 SPI Screen - lower section
Intrusion Detection Feature
The Intrusion Detection feature limits access for incoming traffic at the
WAN ports.
2 Check the SPI and Anti-DoS firewall protection check box to enable SPI.
When this feature is enabled, all incoming packets will be blocked except
for those types that you allow in the Stateful Packet Inspection section.
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Firewall
53
3 If required, check the RIP defect check box. This feature stops
unacknowledged packets from accumulating in the input queue.
Stateful Packet Inspection
4 The Stateful Packet Inspection section displays a list of traffic types. If you
leave the check box for a traffic type blank, this traffic type is blocked. If
you check the check box, the Router allows this type of incoming traffic,
but only if the connection was initiated from the local LAN.
For example, if you check only the FTP Service check box, all incoming
traffic is blocked except for FTP connections initiated from the local LAN.
Alert by E-mail
5 In the Your E-mail Address text box, enter the e-mail address you want
alerts to be sent in the event of a hacker attack.
6 Enter your SMTP Server Address.
7 Enter your SMTP Server User Name.
8 Enter your SMTP Server Password.
Connection Policy
9 In the Fragmentation half-open wait text box, enter the length of time, in
seconds, that you want an unassembled packet to remain active before
the Router drops it. The default is 10 seconds.
10 In the TCP SYN wait text box, enter the length of time, in seconds, that
you want the Router to wait for a TCP session to synchronize before it
drops the session. The default is 30 seconds.
11 In the TCP FIN wait text box, enter the length of time, in seconds, that
you want a TCP session to remain active after the Router detects a FIN
packet. The default is 5 seconds.
12 In the TCP connection idle timeout text box, enter the length of time, in
seconds, that you want a TCP session to remain active if there is no
activity. The default is 3600 seconds (1 hour).
13 In the UDP session idle timeout text box, enter the length of time, in
seconds, that you want a UDP session to remain active if there is no
activity. The default is 30 seconds.
14 In the H.323 data channel idle timeout text box, enter the length of time,
in seconds, that you want an H.323 session to remain active if there is no
activity. The default is 180 seconds.
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CHAPTER 5: ROUTER CONFIGURATION
DoS Detect Criteria
15 In the Total incomplete TCP/UDP sessions HIGH text box, enter the
number of unestablished sessions that will cause the software to start
deleting half-open sessions. The defaiult is 300.
16 In the Total incomplete TCP/UDP sessions LOW text box, enter the
number of unestablished sessions that must be reached before the
software stops deleting half-open sessions. The default is 250.
17 In the Incomplete TCP/UDP sessions (per min) HIGH text box, enter the
maximum number of incomplete TCP/UDP sessions allowed per minute.
The default is 250 sessions.
18 In the Incomplete TCP/UDP sessions (per min) LOW text box, enter the
minimum number of incomplete TCP/UDP sessions allowed per minute.
The default is 200 sessions.
19 In the Maximum incomplete TCP/UDP sessions number from the same
host text box, enter the maximum number of incomplete sessions
allowed from the same host. The default is 10 sessions.
20 In the Incomplete TCP/UDP sessions detect sensitive time period text box,
enter the length of time that msut elapse before an incomplete TCP/UDP
session is detected as incomplete. The default is 300 msec.
21 In the Maximum half-open fragmentation packet number from the same
host text box, enter the maximum number of half-open fragmentation
packets allowed from the same host. The default is 30 packets.
22 In the Half-open fragmentation detect sensitive time period text box,
enter the length of time that must elapse before a half-open
fragmentation session is detected as half-open. The default is 10000
msec.
23 In the Flooding cracker block time text box, enter the length of time that
must elapse between detection of a flood attack and blocking the attack.
The default is 300 seconds.
24 Click Apply to save the settings.
Special Applications Special Applications let you choose specific ports, and for these ports to
choose the specific applications that you want to work with the Network
Address Translation (NAT) feature of the Router. You can either choose
from a list of applications, or configure another application using
information supplied by the application vendor.
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To set up one of the listed Special Applications on your Router, do the
following:
1 Select Firewall from the main menu, then select Special Applications from
the sub-menu. The Special Applications screen displays (Figure 34).
Figure 34 Special Application Screen
2 Select an application from the Popular Applications drop-down list.
3 Select the row that you want to copy the settings to from the Copy To
drop-down list, and click on Copy To. The settings will be transferred to
the row you specified.
4 Click Apply to save the setting for that application.
If the application you want to configure is not listed, you will need to
check with the application vendor to determine which ports need to be
configured. You can then manually input this port information into the
Router. To do this:
1 Specify the trigger port (the one used by the application when it is
initialized) in the Trigger Port column, and specify whether the trigger is
TCP or UDP in the Trigger Type column.
2 Specify the public ports used by the application in the Public Port column.
These are the ports that will need to be opened up in the firewall for the
application to work properly, . Also specify whether these ports are TCP
or UDP in the Public Type column.
3 If required, temporarily enable or disable an entry in the table by checking
or unchecking the Enabled checkbox.
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CHAPTER 5: ROUTER CONFIGURATION
4 Click Apply to save the setting for this application.
Virtual Servers This function will allow you to route external (Internet) calls for services
such as a web server (port 80), FTP server (Port 21), or other applications
through your Router to your internal network. Since your internal
computers are protected by a firewall, machines from the Internet cannot
get to them because they cannot be 'seen'.
If you need to configure the Virtual Server function for a specific
application, you will need to contact the application vendor to find out
which port settings you need.
To manually enter Virtual Server settings, do the following:
1 Select Firewall from the main menu, then select Virtual Servers from the
sub-menu. The Virtual Servers screen displays (Figure 35)
Figure 35 Virtual Server Screen
2 Click Add to configure a new Virtual Server entry, or click Edit in the
Configure column to edit an existing entry. The Virtual Server - Add/Edit
screen displays (Figure 36).
You can delete an existing entry by clicking on delete in the Configure
column.
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Firewall
57
Figure 36 Virtual Server - Add/Edit Screen
3 Enter the IP address of the internal machine in the LAN IP Address text
box.
4 Select a protocol type (TCP, UDP or both) from the Protocol Type
drop-down list.
5 Enter the LAN Port which the traffic will be routed to in the LAN Port text
box.
6 Enter the Public port that will be seen by clients on the Internet in the
Public Port text box.
7 Check the Enable check box to activate this Virtual Server.
8 Click Apply to save this Virtual Server entry.
Client IP Filters This sub-menu option displays three tabs along the top of the main
screen: Access Control, URL Filter, and Schedule Rule. Each of these tabs
displays a screen that enables you to configure a client IP filter function.
Access Control
Access Control allows you to define the types of traffic permitted or not
permitted to and from the Internet.
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CHAPTER 5: ROUTER CONFIGURATION
To configure Access Control, do the following:
1 Select Firewall from the main menu, then select Client IP Filters from the
sub-menu, and make sure the Access Control tab is selected. The Access
Control screen displays (Figure 37).
Figure 37 Access Control Screen
2 At the Enable Filtering Function radio buttons, select Enable or Disable to
enable or disable all Access Control rules.
3 Click Apply to save the settings.
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Firewall
59
To control access to specific Internet services:
1 Click on Add PC, or click Edit in the Configure column to edit an existing
entry. The Access Control - Add PC screen displays (Figure 38).
Figure 38 Access Control - Add PC Screen
2 Enter a description for the filter you are defining in the Client PC
Description field.
3 Enter the IP address or IP address range into the Client IP Address fields.
4 Select the services to be blocked. A list of popular services is given on this
screen; to block a particular service place a check in the appropriate
Blocking checkbox.
custom range of ports at the bottom of the page, under User Defined
Blocked Ports.
5 If you want the restriction to only apply at certain times, select the
schedule rule to apply from the Schedule Rule drop down list.
Schedule Rules are defined on the Schedule Rule screen (see “Schedule
Rule” on page 60).
6 Click Apply to save the settings.
URL Filter
Select the URL Filter tab to specify the web sites or keywords that you
want to filter on your network. The URL Filter screen displays (Figure 39).
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CHAPTER 5: ROUTER CONFIGURATION
Figure 39 URL Filter Screen
To configure URL Filtering, do the following:
1 Enter the URLs or keywords to be allowed or blocked in the URL/Keyword
column.
2 Select either Denied or Allowed from the Mode drop-down list to deny or
allow access to web site containing these words.
For example, entering a keyword of “sex” would block access to any URL
that contains the string “sex”. However, this would also filter the
following URLs:
■
www.sussex.com
■
www.thisexample.com
carefully.
3 Click Apply to save the settings.
For URL Filtering to work, you will need to make sure that URL filtering is
enabled for each client PC in the "Access Control" screen. To do this:
■
In the Access Control - Add PC screen (Figure 38), check the Blocking
check box for Enable URL Filter to activate the URL filtering specified in
the URL Filter table. See “Access Control”on page 57.
Schedule Rule
You can configure the Router to restrict access to the Internet, e-mail or
other network services at specific days and times. The schedule rules that
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Firewall
61
you set up here are available for selection when you configure access
control (see “Access Control”on page 57).
To configure a schedule rule, do the following:
1 Select Firewall from the main menu, then select Client IP Filters from the
sub-menu, and select the Schedule Rule tab. The Schedule Rule screen
displays (Figure 40).
Figure 40 Schedule Rule Screen
2 Click Add Rule, or click Edit in the Configure column to edit an existing
entry. The Schedule Rule - Add Rule screen displays (Figure 41).
You can delete an existing entry by clicking on deletein the Configure
column.
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CHAPTER 5: ROUTER CONFIGURATION
Figure 41 Schedule Rule - Add Rule Screen
3 Enter a name and comment for the schedule rule in the Name and
Comment text boxes.
4 Specify the schedule rules for the required days and times. Note that all
times should be in 24 hour format.
5 Click Apply to save the settings.
MAC Address The MAC Address Filter is a powerful security feature that allows you to
Filtering specify which computers are allowed on the network. Any computers
attempting to access the network that are not specified in the filter list
will be denied access.
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Firewall
63
To set up MAC Address Filtering, do the following:
1 Select Firewall from the main menu, then select MAC Address Filtering
from the sub-menu. The MAC Address Filtering screen displays
(Figure 42).
Figure 42 MAC Address Filtering
2 To enable this feature, click the Enable radio button.
3 Enter the MAC address of each client on your network that you want to
allow network access in the MAC Address text boxes.
Alternatively, you can copy a MAC address into the MAC Address text
box, as follows:
a Select the name of the computer from the DHCP Client List
b Select a row ID from the Copy To drop-down list
c Click on Copy To. The MAC address is inserted into the selected row.
4 Click Apply to save the settings.
DMZ If you have a client PC that cannot run an Internet application properly
from behind the firewall, you can open the client up to unrestricted
two-way Internet access. This may be necessary if the NAT feature is
causing problems with an application such as a game or video
conferencing application.
CAUTION: Use this feature on a temporary basis. The computer in the
DMZ is not protected from hacker attacks.
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CHAPTER 5: ROUTER CONFIGURATION
To put a computer in the DMZ, do the following:
1 Select Firewall from the main menu, then select DMZ from the sub-menu.
The DMZ screen displays (Figure 43).
Figure 43 DMZ Screen
2 Select the ENABLE radio button.
3 The first row in the Public IP Address column defaults to the IP address of
the WAN interface. Enter the last digits of the client PCs IP address in the
Client PC IP Address text box.
4 If you have been assigned more than one IP address for the WAN
interface, then you can enter up to eight different IP addresses in the
Public IP Address text boxes.
5 For each Public IP Address, enter a client PCs IP address in the Client PC IP
Address text box.
6 Click Apply to save the settings.
VPN
The Router has a Virtual Private Network (VPN) feature that provides a
secure link between remote users and the corporate network by
establishing an authenticated and encrypted tunnel for passing secure
data over the Internet. The Router supports three modes of VPN
operation:
■
IPsec (IP Security) — provides IP network-layer encryption. IPSec can
support large encryption networks (such as the Internet) by using
digital certificates for device authentication. When setting up an IPSec
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VPN
65
connection between two devices, make sure that they support the
same encryption method.
Enabling IPSec VPN disables pass-through to IPSec and L2TP over IPSec
Virtual Servers on the LAN. Pass-through outbound from clients on the
LAN to servers on the Internet is unaffected.
■
PPTP (Point-to-Point Tunneling Protocol) — provides a secure tunnel
for remote client access to a PPTP security gateway. It is not as secure
as IPSec but is easy to administer. PPTP does not support gateway to
gateway connections and is only suitable for connecting remote users.
Check that your ISP’s routers support this protocol before you use it.
Enabling the PPTP Server disables PPTP pass-through to a Virtual Server
on the LAN. Pass-through outbound from clients on the LAN to servers
on the Internet is unaffected.
■
L2TP over IPSec — this is a combination of two protocols. L2TP is used
to authenticate a user, and IPSec is used to encrypt data. L2TP over
IPSec does not support gateway to gateway connections and is only
suitable for connecting remote users. Check that your ISP’s routers
support this protocol before you use it.
Enabling L2TP over IPSec disables pass-through to IPSec and L2TP over
IPSec Virtual Servers on the LAN. Pass-through outbound from clients on
the LAN to servers on the Internet is unaffected.
Using the VPN Tunnel Configuration screen, you can add new IPSec, L2TP
over IPSec and PPTP connections, and to edit existing connections. When
adding or editing values on this screen remember that both ends of the
connection must contain the same information.
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CHAPTER 5: ROUTER CONFIGURATION
To configure a VPN connection on your Router:
1 Select VPN from the main menu.The VPN screen displays (Figure 44).
Figure 44 VPN Screen
2 In the Enable VPN section, select the Yes radio button for the connection
methods you want to use.
IPSec must be enabled if you want to use L2TP over IPSec.
3 To set up the Router for L2TP and PPTP, you must allocate IP addresses
from the Router’s LAN for use with the protocol. The connections made
by L2TP and PPTP will appear to come from these addresses. The
addresses must be in a continuous range.
In the IP Address Pool for L2TP/PPTP Clients section, enter the first LAN
address in the range in the Start Address text boxes, and the last address
These addresses must be within the Router’s LAN subnet, and must not
4 The VPN Connections table displays the currently configured VPN
connections. Refer to one of the following sections for details on how to
set up or edit a VPN connection:
■
■
■
“Adding an IPSec Connection” on page 67.
“Adding an L2TP over IPSec Connection” on page 68.
“Adding a PPTP Connection” on page 70.
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VPN
67
Adding an IPSec To add an IPSec Connection, or to edit an existing IPSec connection:
Connection
1 In the VPN screen, click Add, or click Edit to edit an existing connection.
2 At the Tunnel Type drop-down list, select IPSec. The screen shown in
Figure 45 displays.
Figure 45 VPN Tunnel Configuration - IPSec Screen
3 Enter a descriptive name for the tunnel at the Tunnel Name text box.
4 At the Remote VPN Server drop-down list, select either IP Address or
ANY. If you select IP Address, enter the IP address or host name of the
you do not need to specify an IP address or host name, as any remote
server can be used.
5 At the Remote Party ID drop-down list, select either IP_IPV4_ADDR or
ID_USER_FQDN. This must be entered identically on the IPSec software
installed on the client’s machine.
If you select IKE Main Mode from the Key Management drop-down list
(see step 8), you must enter IP_IPV4_ADDR here.
6 Type a name for the Remote Party ID in the text box next to the
drop-down list. This must be unique for each connection rule that you
create.
7 Enter the Remote Network Address and Remote Subnet Mask for the
Remote Party ID. The remote network address is usually the network
address of the LAN connected to the remote server.
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CHAPTER 5: ROUTER CONFIGURATION
8 Enter the Network Address and Subnet Mask of the local secure group.
The network address of the local secure group is usually the network
address of the local network.From the Key Management drop-down list,
select either IKE Main Mode or IKE Aggressive Mode.
9 At the Pre-shared Key text box, enter the password for the connection.
This must be unique for each connection rule that you create.
10 Enter the Key lifetime, in seconds. The default is 3600 seconds. The value
must be at least 300 seconds.
11 Select MD5, SHA1 or None from the Authentication Algorithm
drop-down list. Both ends of the connection must use the same value.
12 Select DES, 3DES or None from the Encrypt Algorithm drop-down list.
3DES is more secure than DES but may take longer to encrypt. Both ends
of the connection must use the same value.
3DES is not shipped as standard with the Router due to international
restrictions on encryption. If your country permits their use, they can be
downloaded from the 3Com Web site at http://www.3com.com
13 Click Apply to save the settings.
The IKE Keep Alive feature is not available.
Adding an L2TP over To add an L2TP over IPSec Connection, or to edit an existing L2TP over
IPSec Connection IPSec connection:
1 In the VPN screen, click Add, or click Edit to edit an existing connection.
2 At the Tunnel Type drop-down list, select L2TP over IPSec. The screen
shown in Figure 46 displays.
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VPN
69
Figure 46 VPN Tunnel Configuration - L2TP over IPSec Screen
3 Enter a name for the tunnel at the Tunnel Name text box.
4 Enter the user name that the remote VPN client will use to connect in the
User name text box.
5 Enter the password that will need to be supplied to connect in the
Password text box.
6 Type in an Idle Timeout. This is the amount of time, in minutes, that you
want the connection to remain inactive before it times out. Enter 0 if you
do not want the connection to timeout.
7 Select either the L2TP Server or L2TP Client radio button. If you select
L2TP Client, enter the following information:
■
Check the Auto reconnect check box if you want to automatically
re-connect if the session ends or is dropped.
■
■
Select either Network or Host as the local type setting.
Enter the Remote Server address in the text box.
8 If you want to enter details of the remote network, check the Remote
Network Setting - Enable check box, then enter the Remote Network
Address and Remote Subnet Mask. This information must be entered if
you want to see clients connected to the L2TP over IPSec server.
9 At the Pre-shared Key text box, enter the password for the IPSec
connection. This must be unique for each connection rule that you
create.
10 At the Remote Party ID drop-down list, select either IP_IPV4_ADDR or
ID_USER_FQDN.
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CHAPTER 5: ROUTER CONFIGURATION
11 Type a name for the Remote Party ID in the text box next to the
drop-down list. This must be unique for each connection rule that you
create.
12 Click Apply to save the settings.
Adding a PPTP To add a PPTP Connection, or to edit an existing PPTP connection:
Connection
1 In the VPN screen, click Add, or click Edit to edit an existing connection.
2 At the Tunnel Type drop-down list, select PPTP. The screen shown in
Figure 47 displays.
Figure 47 VPN Tunnel Configuration - PPTP Screen
3 Enter a name for the tunnel at the Tunnel Name text box.
4 Enter the user name that the remote VPN client will use to connect in the
User name text box.
5 Enter the password that will need to be supplied to connect in the
Password text box.
6 Type in an Idle Timeout. This is the amount of time, in minutes, that you
want the connection to remain inactive before it times out. Enter 0 if you
do not want the connection to timeout.
7 Select either the PPTP Server or PPTP Client radio button. If you select
PPTP Client, enter the following information:
■
Check the Auto reconnect check box if you want to re-connect
automatically after the PPTP session ends or is dropped.
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SNMP
71
■
■
Select either Network or Host as the local type setting.
Enter the Remote Server IP address in the text box.
8 If you want to enter details of the remote network, check the Remote
Network Setting - Enable check box, then enter the Remote Network
Address and Remote Subnet Mask.
9 Click Apply to save the settings.
SNMP
SNMP (Simple Network Management Protocol) allows remote
management of your Router by a PC that has an SNMP management
agent installed.
You can configure the following SNMP parameters:
■
■
Community — This configures the SNMP community string, which
authenticates remote users.
Trap — You can also configure the Router to send status messages to
the SNMP management agent if a problem occurs on the network.
This is done by using Traps.
To set up SNMP Community and Trap parameters, do the following:
1 Select SNMP from the main menu. The SNMP screen displays (Figure 48).
Figure 48 SNMP Screen
2 Select Enable to activate SNMP.
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CHAPTER 5: ROUTER CONFIGURATION
3 In the Community column, enter the name of the SNMP communication
channel. Your SNMP management agent needs to be configured with this
name so that it can communicate with your Router.
4 In the Access column, select either:
■
Read to allow the management agent to collect data (for example,
bandwidth usage) from your Router. Or,
■
Write to allow the management agent to change the configuration of
your Router.
5 Check the Valid check box to enable the community.
6 If you do not want to configure your Router to send status messages to
the SNMP management agent if a problem occurs, click Apply to save the
settings.
If you want to configure your Router to send status messages, or Traps,
configure SNMP Traps in the lower section of the screen as follows:
7 In the IP Address field, enter the IP address of the PC to which you want
your Router to send status messages.
8 In the Community field, enter the community that you want to use to
access status messages.
9 Select the version of trap messaging that your management agent
supports from the Version drop-down list. The Router supports V1 and
V2c trap messaging.
10 Click Apply to save the settings.
System Tools
These screens enable you to manage different parameters of the Router
and perform administrative functions. The Systems Tools menu has the
following sub-menus:
■
■
■
Restart Router — enables you to restart the Router and retain the
current system configuration.
Reset to Factory Defaults — resets the Router to factory default
settings, and loses the current configuration.
Backup/Restore Settings — enables you to save a configuration file,
and restore any saved configuration file.
■
■
■
Upgrade — enables you to upgrade the Router’s firmware.
Admin Password — enables you to reset the system password.
Time Zone — enables you to change time zone settings.
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System Tools
73
Refer to the following sections for details on each of these options.
Restart Router Sometimes it may be necessary to restart or reboot the Router. Restarting
or rebooting the Router will not delete any of your configuration settings.
To restart the Router:
1 Select System Tools from the main menu, then select Restart from the
sub-menu. The Restart Router screen displays (Figure 49).
Figure 49 Restart Router Screen
2 Click Restart to restart Router.
Reset to Factory Use this option to reset all of the configuration settings in the Router to
Defaults the factory (default) settings.
CAUTION: 3Com recommends that you backup your configuration
settings before you reset to factory defaults, otherwise configuration
information may be lost. Refer to “Backup/Restore Settings” on page 74
for details.
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CHAPTER 5: ROUTER CONFIGURATION
To restore the factory default settings:
1 Select System Tools from the main menu, then select Reset to Factory
Defaults from the sub-menu. The Reset to Factory Defaults screen
displays (Figure 50).
Figure 50 Reset to Factory Defaults Screen
2 Click Reset.
Backup/Restore You can save your current configuration using this feature. Saving your
Settings configuration will allow you to restore it later if your settings are lost or
changed.
3Com recommends that you backup your current configuration before
performing a firmware update or a reset to factory defaults.
This option also enables you to restore a previously saved configuration.
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System Tools
75
Saving a configuration file
To save a configuration file:
1 Select System Tools from the main menu, then select Backup/Restore
Settings from the sub-menu. The Backup/Restore Settings screen displays
(Figure 51).
Figure 51 Backup/Restore Settings Screen
2 Click Save to save your current configuration settings.
Restoring a configuration file
To restore a previously saved configuration file:
1 Select System Tools from the main menu, then select Backup/Restore
Settings from the sub-menu. The Backup/Restore Settings screen displays
(Figure 51).
2 Click Browse to display the list of currently saved configuration files. The
file you select displays in the text box.
3 Click Restore to restore this configuration file.
Upgrade From time to time 3Com may release new versions of the Router’s
firmware. Firmware updates contain improvements and fixes to problems
that may exist with the current version.
Please download the firmware file to your PC first, and then use the
Upgrade screen to upload the firmware to the Router.
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CHAPTER 5: ROUTER CONFIGURATION
To upload a firmware file from your PC to your Router:
1 Select System Tools from the main menu, then select Upgrade from the
sub-menu. The Upgrade screen displays (Figure 52).
Figure 52 Upgrade Screen
2 Click Browse to display the list of currently saved firmware upgrade files.
The file you select displays in the text box.
3 Click Upgrade to upload this firmware file to your Router.
Admin Password The Router ships with a default password of admin. 3Com recommends
that you change the password for added security. Keep your password in
a safe place as you will need this password to log in to the Router in the
future. 3Com also recommends that you set a password if you plan to use
the Remote management feature of this Router.
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System Tools
77
To change the password:
1 Select System Tools from the main menu, then select Admin Password
from the sub-menu. The Admin Password screen displays (Figure 53).
Figure 53 Admin Password Screen
2 Enter the current password into the Current password text box.
3 Enter the new password into the New Password and Confirm New
Password fields.
4 Type in a Login Timeout. This is the amount of time you want the Router
to remain inactive before it returns to the login screen. The default is 10
minutes.
5 Click Apply.
Time Zone The Router keeps time by connecting to a Simple Network Time Protocol
(SNTP) server. This allows the Router to synchronize the system clock to
the Internet. The synchronized clock in the Router is used to record the
security log and control client filtering.
You can specify which SNTP servers the Router will use to update it’s
system clock, although doing this should only be necessary if you are
experiencing difficulty.
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CHAPTER 5: ROUTER CONFIGURATION
To configure time zone settings:
1 Select System Tools from the main menu, then select Time Zone from the
sub-menu. The Time Zone screen displays (Figure 54).
Figure 54 Time Zone Screen
2 Select the Base Date and Base Time. The Router will use these settings if it
is unable to connect to the Internet or SNTP Server.
3 To enable SNTP, check the Using Time Server (NTP) check box.
4 Select a time zone from the Set Time Zone drop down list.
5 Enter the interval, in hours, at which to want the Router to resynchonize
with the SNTP Server, at the Synchonization Interval text box. The default
is every 24 hours.
6 Select a primary SNTP server, and if required a secondary SNTP server
from the appropriate drop down boxes.
7 If you want to enable daylight saving, check the Daylight Savings check
box.
8 Select the month and day that you want daylight savings to begin at Start
Time, and select the month and day that you want daylight davings to
end at End Time.
The Daylight Savings option advances the system clock by one hour
between the dates that you specify in the Start Time and End Time drop
down lists. It does not cause the system clock to be updated for daylight
savings time automatically.
9 Click Apply to save the settings.
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Advanced
79
Advanced
From the Advanced Screen, you can configure:
■
NAT (Network Address Translation) and IPSec NAT-T (NAT Traversal)
Pass-through
■
■
■
Universal Plug and Play
WAN Ping Blocking
Remote Administration
The sub-menu topics in the Advanced menu also enable you to configure
Routing options, and to configure Dynamic DNS.
NAT
■
NAT — Before you disable this function, make sure you have changed
the administrator password. Network Address Translation (NAT) is the
method by which the router shares the single IP address assigned by
your ISP with the computers on your network.
This function should only be disabled if your ISP assigns you multiple IP
addresses or you need NAT disabled for an advanced system
configuration. If you have a single IP address and you turn NAT off,
the computers on your network will not be able to access the Internet.
Other problems may also occur.
■
IPSec NAT-T Pass-through — NAT-T (NAT Traversal) is an Internet Draft
proposed to IETF in order to help the problems associated with passing
IPSec traffic through NAT Routers. For NAT-T to work, both ends of the
connection need to support this function.
Ensure that you enable NAT-T only if it is needed, as it will reduce
LAN-WAN throughput. The OfficeConnect Cable/DSL Router supports
NAT-T draft 2 implementation.
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CHAPTER 5: ROUTER CONFIGURATION
To configure NAT, and IPSec NAT-T Pass-through:
1 Select Advanced from the main menu. The Advanced screen displays
(Figure 55).
Figure 55 Advanced
2 To disable NAT, select the OFF radio button.
3Com recommends that you leave NAT enabled for maximum security.
3 To enable IPSec NAT-T Pass-through, select the On radio button.
4 If required, continue configuring advanced options on this screen, or click
Apply to save the settings.
Universal Plug and Universal Plug and Play is a technology that offers seamless operation of
Play voice messaging, video messaging, games, and other applications that
are Universal Plug and Play compliant. Some applications require the
Router's firewall to be configured in a specific way to operate properly.
This usually requires opening TCP and UDP ports and in some instances
setting trigger ports. An application that is Universal Plug and Play
compliant has the ability to communicate with the Router, basically
"telling" the Router which way it needs the firewall configured. The
Router ships with the Universal Plug and Play feature disabled. If you
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Advanced
81
want to use any applications that are Universal Plug and Play compliant,
you can enable this feature. To enable Universal Plug and Play:
1 Select Advanced from the main menu. The Advanced screen displays
(Figure 55).
2 To enable Universal Plug and Play, select the ON radio button.
3 If required, continue configuring advanced options on this screen, or click
Apply to save the settings.
WAN Ping Blocking Computer hackers use what is known as "Pinging" to find potential
victims on the Internet. By pinging a specific IP address and receiving a
interest might be there.
The Router can be set up so it will not respond to an ICMP Ping from the
outside. This heightens the level of security of your Router.
To turn off the ping response:
1 Select Advanced from the main menu. The Advanced screen displays
(Figure 55).
2 Check the Block ICMP Ping check box.
3 If required, continue configuring advanced options on this screen, or click
Apply to save the settings.
Remote Remote Administration allows you to make changes to your Router’s
Administration settings from anywhere on the Internet. You can choose to either:
■
■
Enable any PC on the network to remotely manage your Router
Enter one specific IP address that can remotely manage your router.
manage the Router
Before you enable this function, ensure that you have set the
Administration Password.
To set up remote administration:
1 Select Advanced from the main menu. The Advanced screen displays
(Figure 55).
2 Either:
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CHAPTER 5: ROUTER CONFIGURATION
■
■
Check the Any IP address can remotely manage the router check box
if you want any PC to be able to remotely manage the Router. Or,
Enter the IP address of the PC that you want to remotely manage the
Router in the Only this IP address can remotely manage the router
check box
3 Enter the number of the port that will be used to remotely manage the
Router in the Port for remotely manage the router text box. This must be
entered in the browser as part of the URL when the remote user logs in.
4 Click Apply to save the settings.
Routing This sub-menu option displays three tabs along the top of the main
screen: Static Route, RIP and Routing Table.
Static Route
The Router supports static route functionality. Select the Static Route tab
from the Advanced > Routing sub-menu to display the screen shown in
Figure 56
Figure 56 Static Route screen
The following information is displayed for each static route:
■
■
Index - the index of the static route
Network Address - the network address of the route. If network
address and subnet mask are both set to 0.0.0.0, this is the default
route.
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Advanced
83
■
■
Subnet Mask - the subnet mask of the route. If network address and
Gateway - the gateway used to route data to the network specified by
the network address.
To configure a static route:
1 Click on Add to add a new route, or click Edit in the Configure column to
edit an existing entry. The Add/Edit Static Route screen displays
(Figure 57).
You can delete an existing entry by clicking on delete in the Configure
column.
Figure 57 Add/Edit Static Route Screen
2 Enter the Network Address, Subnet Mask and Gateway for this route,
and click Apply. The route is added to the Static Route table.
RIP
The Router supports the Routing Information Protocol (RIP). RIP allows
you to set up routing information on one RIP enabled device, and have
that routing information replicated to all RIP enabled devices on the
network. LAN and WAN interfaces can be configured independently of
each other.
Select the RIP tab from the Advanced > Routing sub-menu to display the
screen shown in Figure 58
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CHAPTER 5: ROUTER CONFIGURATION
Figure 58 RIP screen
To set up RIP and auto summary, and to set up or change information for
the LAN interface, the WAN interface or both:
1 Check the RIP Mode - Enable check box to configure RIP on the Router.
2 Check the Auto Summary - Enable check box if you want the Router to
send simplified routing data to other RIP devices, instead of full routing
data.
3 Select one of Disable, Enable or Silent from the Operation Mode
drop-down list. If you select Enable, the Router transmits RIP update
information to other RIP enabled devices. If you select Silent, the Router
only receives RIP update messages.
4 Select either 1 (for RIPv1) or 2 (for RIPv2) from the Version drop-down list.
3Com recommends that you use RIPv1 if there is any RIP enabled device
on your network that does not support RIPv2. In all other case, select
RIPv2.
5 Select either Enable or Disable from the Poison Reverse drop-down list.
Enabling Poison Reverse on your Router allows it to indicate to other
RIP-enabled devices that they both have routes that point to each other,
preventing data loops.
6 Select either None or Password from the Authentication Required
drop-down list. If you select Password, an unencrypted text password
must be set on all RIP-enabled devices.
7 If you selected Password at step 6, enter a password at the
Authentication Code prompt.
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Advanced
85
8 Click Apply to save the settings.
Routing Table
Select the Routing Table tab from the Advanced > Routing sub-menu to
display routing information used by the Router. The information is
displayed in the format shown in Figure 59
Figure 59 Routing Table screen
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CHAPTER 5: ROUTER CONFIGURATION
DDNS Dynamic Domain Name Server (DDNS) enables you to map a static
providers, TZO.com and DYNDNS. Before you can set up DDNS, you must
obtain an account, password and static domain name from your DDNS
provider. DDNS is disabled by default.
To set up DDNS:
1 Select Advanced from the main menu, then select DDNS from the
sub-menu. The DDNS screen displays (Figure 60).
Figure 60 DDNS screen
2 Select the Dynamic DNS Enable radio button.
3 Select a DDNS Service Provider from the drop-down list. This can be either
TZO.com or DynDNS.
TZO.com
If you select TZO.com:
1 In the Domain Name text box, enter the domain name.
2 In the E-mail text box, enter the account name.
3 In the Key text box, enter the account password.
4 Click Apply to make this service active.
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Status and Logs
87
DynDNS
If you select DYNDNS:
1 In the Domain Name text box, enter the domain name.
2 In the Account text box, enter the account name.
3 In the Password text box, enter the account password.
4 Click Apply to make this service active.
Status and Logs
Selecting Status and Logs from the main menu displays the Status Screen,
and also displays two sub-menus: Traffic Metering and Logs.
Router, including the version numbers of your router’s software and
hardware. You can also and check the status of Internet connections,
Internet settings and LAN settings.
To view the Status screen:
1 Select Status and Logs from the main menu. The screen shown in
Figure 61 displays:
Figure 61 Status Screen
2 If required, click Renew to update the displayed information, or click
Release to ...
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CHAPTER 5: ROUTER CONFIGURATION
Traffic Metering The Traffic Metering screen displays the amount of data transmitted to
and received from the Internet. This information is provided for guidance
only, and may differ from that used by your ISP for billing purposes.
To view the Traffic Metering screen:
1 Select Status and Logs from the main menu, then select the Traffic
Metering sub-menu. The screen shown in Figure 62 displays:
Figure 62 Traffic Metering Screen
2 If required, click Refresh to update the displayed information.
Logs The Logs screen shows any attempts that have been made to gain access
to your network, as well as the system activities.
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Support/Feedback
89
To display log information:
1 Select Status and Logs from the main menu, then select Logs from the
sub-menu. The Logs screen displays (Figure 63):
Figure 63 Logs Screen
2 Either:
■
Click Refresh to update the display. Or,
■
Click Clear to clear the log (note that all current entries will be erased).
Or,
■
Click Save to save the log to disk in a text file. When prompted for a
location to save the file to, specify a filename and location, and then
click OK.
Support/Feedback
Selecting Support/Feedback from the main menu displays the Support
screen and the Feedback sub-menu topic.
Support Selecting the Support option on the main menu displays the support links
screen, which contains a list of Internet links that provide information and
support concerning the Router (Figure 64).
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CHAPTER 5: ROUTER CONFIGURATION
Figure 64 Support Screen
Feedback Selecting the Feedback option on the sub-menu displays the Feedback
screen and allows you to provide feedback to 3Com on the operation of
your Router (Figure 65). This screen should not be used to obtain
technical support.
Figure 65 Feedback Screen
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TROUBLESHOOTING
6
Basic Connection
Checks
■
Check that the Router is connected to your computers and to the
telephone line, and that all the equipment is powered on. Check that
the LAN Status LED and Cable/DSL Status LED on the Router are
illuminated, and that any corresponding LEDs on the NIC are also
illuminated.
■
■
Ensure that the computers have completed their start-up procedure
and are ready for use. Some network interfaces may not be correctly
initialized until the start-up procedure has completed.
If the LAN Status LED does not illuminate for a port that is connected,
check that you do not have a faulty cable. Try a different cable.
Browsing to the
Router
If you have connected your Router and computers together but cannot
Configuration
Screens
■
Confirm that the physical connection between your computer and the
Router is OK, and that the LAN Status LEDs on the Router and NIC are
illuminated and indicating the same speed (10Mbps or 100Mbps).
Some NICs do not have status LEDs, in which case a diagnostic
program may be available that can give you this information.
■
Ensure that you have configured your computer as described in
Chapter 3, Setting Up Your Computers. Restart your computer while it
is connected to the Router to ensure that your computer receives an IP
address.
■
■
When entering the address of the Router into your web browser,
ensure that you use the full URL including the http:// prefix (for
example, http://192.168.1.1).
Ensure that you do not have a Web proxy enabled on your computer.
Go to the Control Panel and click on Internet Options. Select the
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CHAPTER 6: TROUBLESHOOTING
Connections tab and click on the LAN Settings button at the bottom.
Make sure that the Proxy Server option is unchecked.
■
If you cannot browse to the Router, use the winipcfg utility in
Windows 95/98/ME to verify that your computer has received the
correct address information from the Router.
From the Start menu, choose Run and then enter winipcfg. Check
that the computer has an IP address of the form 192.168.1.xxx (where
xxx is in the range 2-254), the subnet mask is 255.255.255.0, and the
default Router address is 192.168.1.1. If these are not correct, use the
Release and Renew functions to obtain a new IP address from the
Router.
Under Windows 2000 and Windows XP, use the ipconfig
command-line utility to perform the same functions.
Connecting to the
Internet
If you can browse to the Router configuration screens but cannot access
sites on the Internet, check the following:
■
Confirm that the physical connection between the Router and the
cable/DSL modem is OK, and that the Cable/DSL Status LEDs on both
Router and modem are illuminated.
■
■
Confirm that the connection between the modem and the cable/DSL
interface is OK.
Ensure that you have entered the correct information into the Router
configuration screens as required by your Internet Service Provider. Use
the “Internet Settings” screen to verify this. Refer to “Internet
Settings” on page 42.
■
■
For DSL users, check that the PPPoE or PPTP user name, password and
service name are correct, if these are required. Only enter a PPPoE
service name if your ISP requires one.
For cable users, check whether your ISP requires a fixed MAC
(Ethernet) address or Host Name. If so, use the Hostname and MAC
Address screen in Internet settings to ensure that the correct Host
Name or MAC address is presented. Refer to “Hostname & MAC” on
page 50.
■
Ensure that your computers are not configured to use a Web proxy.
On Windows computers, this can be found under Control Panel >
Internet Options > Connections.
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Forgotten Password and Reset to Factory Defaults
93
ForgottenPassword If you can browse to the Router configuration screen but cannot log in
and Reset to
Factory Defaults
because you do not know or have forgotten the password, follow the
steps below to reset the Router to it’s factory default configuration.
CAUTION: All your configuration changes will be lost, and you will need
to run the configuration wizard again before you can re-establish your
Router connection to the Internet. Also, other computer users will lose
their network connections whilst this process is taking place, so choose a
time when the reset would be convenient.
1 Remove power from the Router.
2 Disconnect all your computers and the cable/DSL modem from the
Router.
3 Using a straight through Ethernet cable, connect the Ethernet Cable/DSL
port on the rear of the Router to any one of the LAN ports.
4 Re-apply power to the Router. The Alert LED will flash as the Router starts
up, and after approximately 30 seconds will start to flash more slowly
(typically 2 seconds on, 2 seconds off). Once the Alert LED has started to
flash slowly, remove power from the Router.
5 Remove the cable connecting the Cable/DSL port to the LAN port, and
reconnect one of your computers to one of the Router LAN ports.
6 Re-apply power to the Router, and when the start-up sequence has
completed, browse to:
http://192.168.1.1
and run the Setup Wizard. You may need to restart your computer before
you attempt this.
7 When the Setup Wizard has completed, you may reconnect your network
as it was before.
Alert LED
The Alert LED will flash when the Router unit is first powered up while
the system software checks the hardware for proper operation. Once the
Router has started normal operation, the Alert LED will go out.
■
If the Alert LED does not go out following start up, but illuminates
continuously, this indicates that the software has detected a possible
fault with the hardware. Remove power from the Router, wait 10
seconds and then re-apply power. If the Alert LED comes on
continuously again, then a fault has been detected. Locate the copy of
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94
CHAPTER 6: TROUBLESHOOTING
the Router software on the accompanying CD-ROM or 3Com web site
(http://www.3com.com) and upload it to the Router to see if this
clears the fault (refer to “Recovering from Corrupted Software”
below). If this does not fix the problem, contact your supplier for
further advice.
■
During normal operation, you may notice the Alert LED lighting briefly
from time to time. This indicates that the Router has detected a hacker
attack from the Internet and has prevented it from harming your
network. You need take no specific action on this, unless you decide
that these attacks are happening frequently in which case you may
wish to discuss this with your ISP. The Router logs such attacks, and
this information is available through the Status and Logs screens.
Power LED or
Power Adapter OK
LED Not Lit
■
Check that your Router is receiving power by looking at the status of
the Power LED on the front panel and the Power Adapter OK LED on
■
If both LEDs are lit green then the unit is receiving power.
■
If both LEDs are unlit then no power is being supplied to the unit.
Check that the power adapter is plugged into a working mains
outlet and that the mains outlet is supplying power. If the mains
socket is supplying power then the power adapter or power
adapter connection may be faulty. See “Replacement Power
Adapters” below.
■
If the Power Adapter OK LED is lit but the Power LED is unlit then
there may be a fault with your unit. Contact 3Com Technical
Support.
■
Check that you are using the correct power adapter for your Router.
You should only use the power adapter supplied with your Router.
Replacement Power If both the Power Adapter OK LED and Power LED are off, check your
Adapters power adapter connection. If the mains outlet is working and is capable
of supplying power to other devices, contact 3Com Technical Support
and ask for a replacement power adapter. Please quote the power
adapter part number shown on the OfficeConnect power adapter you are
using.
Alternatively, quote the part number for your region:
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Recovering from Corrupted Software
95
Table 3 Power Adapter Part Numbers
Part Number
3C16760
3C16761
3C16762
3C16763
3C16764
3C16766
3C16767
3C16768
Region
US and Canada
UK
Europe and Middle East
Australasia (except Japan and Korea)
South Africa
Japan
Korea
Argentina
Recovering from
If the system software has become corrupted, the Router will enter a
Corrupted Software “recovery” state; DHCP is enabled, and the LAN IP address is set to
192.168.1.1. Follow the instructions below to upload a new copy of the
system software to a Router unit in this state.
Before you start, ensure that one of your computers has a copy of the
new software image file stored on its hard disk or available on CD-ROM.
The latest software is available on 3Com’s Web site at:
www.3com.com
1 Remove power from the Router and disconnect all your computers,
except for the one computer with the software image.
2 Reconfigure this computer to obtain an IP address automatically (see
“Obtaining an IP Address Automatically” on page 21)
3 Restart the computer, and re-apply power to the Router.
4 Using the Web browser on the computer, enter the following URL in the
location bar:
http://192.168.1.1.
This will connect you to the Recovery utility in the Router.
5 Follow the on-screen instructions. Enter the path and filename of the
software image file.
6 When the upload has completed, the Router will restart, run the self-test
and, if successful, resume normal operation.
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CHAPTER 6: TROUBLESHOOTING
7 Refer to the Installation Guide to reconnect your Router to the computers
in your network. Do not forget to reconfigure the computer you used for
the software upload.
If the Router does not resume normal operation following the upload, it
may be faulty. Contact your supplier for advice.
Frequently Asked
Questions
How do I reset the Router to Factory Defaults?
Either:
■
If you can log in, refer to “Reset to Factory Defaults” on page 73. Or
■
If you have forgotten your password, and can not log on, see
“Forgotten Password and Reset to Factory Defaults”on page 93..
How many computers on the LAN does the Router support?
A maximum of 253 computers on the LAN are supported.
There are only 4 LAN ports on the Router. How are additional
computers connected?
You can expand the number of connections available on your LAN by
using hubs, switches and wireless access points connected to the Router.
3Com wireless access points and hubs and switches provide a simple,
reliable means of expanding your network; contact your supplier for more
information, or visit:
http://www.3com.com/
Does the Router support virtual private networks (VPNs)?
The Router has a Virtual Private Network (VPN) feature that provides a
secure link between remote users and the corporate network by
establishing an authenticated and encrypted tunnel for passing secure
data over the Internet. Refer to “VPN” on page 64.
Where can I download software updates for the Router?
Updates to the Router software are posted on the 3Com support web
site, accessible by visiting:
http://www.3com.com
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Frequently Asked Questions
97
After you have downloaded the software from the 3Com Web site, you
can upgrade your Router as described in “Upgrade” on page 75.
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CHAPTER 6: TROUBLESHOOTING
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IP ADDRESSING
A
The Internet
Protocol Suite
The Internet protocol suite consists of a well-defined set of
communications protocols and several standard application protocols.
Transmission Control Protocol/Internet Protocol (TCP/IP) is probably the
most widely known and is a combination of two of the protocols (IP and
TCP) working together. TCP/IP is an internationally adopted and
supported networking standard that provides connectivity between
equipment from many vendors over a wide variety of networking
technologies.
Managing the
Router over the
Network
To manage a device over the network, the Router must be correctly
configured with the following IP information:
■
An IP address
■
A Subnet Mask
IP Addresses and Each device on your network must have a unique IP address to operate
Subnet Masks correctly. An IP address identifies the address of the device to which data
is being sent and the address of the destination network. IP addresses
have the format n.n.n.x where n is a decimal number between 0 and 255
and x is a number between 1 and 254 inclusive.
However, an IP Address alone is not enough to make your device operate.
In addition to the IP address, you need to set a subnet mask. All networks
are divided into smaller sub-networks and a subnet mask is a number
that enables a device to identify the sub-network to which it is
connected.
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100
APPENDIX A: IP ADDRESSING
For your network to work correctly, all devices on the network must have:
■
The same sub-network address.
The same subnet mask.
■
The only value that will be different is the specific host device number.
This value must always be unique.
An example IP address is ‘192.168.100.8’. However, the size of the
network determines the structure of this IP Address. In using the Router,
you will probably only encounter two types of IP Address and subnet
mask structures.
Type One
In a small network, the IP address of ‘192.168.100.8’ is split into two
parts:
■
Part one (‘192.168.100’) identifies the network on which the device
resides.
■
Part two (‘.8’) identifies the device within the network.
This type of IP Address operates on a subnet mask of ‘255.255.255.0’.
See Table 4 for an example about how a network with three computers
and a Router might be configured.
Table 4 IP Addressing and Subnet Masking
Device
PC 1
IP Address
Subnet Mask
255.255.255.0
255.255.255.0
255.255.255.0
255.255.255.0
192.168.100.8
192.168.100.33
192.168.100.188
192.168.100.72
PC 2
PC 3
Router
Type Two
In larger networks, where there are more devices, the IP address of
‘192.168.100.8’ is, again, split into two parts but is structured differently:
■
Part one (‘192.168’) identifies the network on which the device
resides.
■
Part two (‘.100.8’) identifies the device within the network.
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How does a Device Obtain an IP Address and Subnet Mask? 101
This type of IP Address operates on a subnet mask of ‘255.255.0.0’.
See Table 5 for an example about how a network (only four computers
represented) and a Router might be configured.
Table 5 IP Addressing and Subnet Masking
Device
PC 1
IP Address
Subnet Mask
255.255.0.0
255.255.0.0
255.255.0.0
255.255.0.0
255.255.0.0
192.168.100.8
192.168.201.30
192.168.113.155
192.168.002.230
192.168.002.72
PC 2
PC 3
PC 4
Router
How does a Device
Obtain an IP
There are three different ways to obtain an IP address and the subnet
mask. These are:
Address and Subnet
Mask?
■
■
■
Dynamic Host Configuration Protocol (DHCP) Addressing
Static Addressing
Automatic Addressing (Auto-IP Addressing)
DHCP Addressing The Router contains a DHCP server, which allows computers on your
network to obtain an IP address and subnet mask automatically. DHCP
assigns a temporary IP address and subnet mask which gets reallocated
once you disconnect from the network.
DHCP will work on any client Operating System such as Windows® 95,
Windows 98 or Windows NT 4.0. Also, using DHCP means that the same
IP address and subnet mask will never be duplicated for devices on the
network. DHCP is particularly useful for networks with large numbers of
users on them.
Static Addressing You must enter an IP Address and the subnet mask manually on every
device. Using a static IP and subnet mask means the address is
permanently fixed.
Auto-IP Addressing Network devices use automatic IP addressing if they are configured to
acquire an address using DHCP but are unable to contact a DHCP server.
Automatic IP addressing is a scheme where devices allocate themselves
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102
APPENDIX A: IP ADDRESSING
an IP address at random from the industry standard subnet of
169.254.x.x (with a subnet mask of 255.255.0.0). If two devices allocate
themselves the same address, the conflict is detected and one of the
devices allocates itself a new address.
Automatic IP addressing support was introduced by Microsoft in the
Windows 98 operating system and is also supported in Windows 2000.
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ISP INFORMATION
B
Information
Regarding Popular
ISPs
WAN Types Characteristics
Popular ISPs
Dynamic IP
Cable modem ISP, non-hostname MediaOne, RoadRunner,
based. Need to clone the MAC
address in the Advanced tab of
the Internet Settings page.
Optimum Online, Time Warner,
Charter, Adelphia, Metrocast.
(Clone MAC)
Dynamic IP
(Hostname)
Cable ISP, Requires Hostname to @Home Network, Cogoco,
authenticate ie. cx213818-B. ComCast, Cox, Excite, Rogers,
Need to enter the hostname in the Shaw, Insight, Videotron
Internet Settings page.
PPPoE
(DSL)
Usually special software installed Bell*, Century Tel, Citizens,
on PC, MacPOET/WinPOET,
EnterNet 300. The Router has this Verizon, First World, Brightnet,
software built in and you can Earthlink, Ameritech, Covad,
Primus, Prodigy, Snet, Sprint FC,
remove it from your PC. You will Mindspring, Sympatico DSL,
need to enter the user name and USwest, Owest, SNet
password that your ISP provided
to you in the PPPoE page of the
Router. Leave the service name
blank unless your ISP requires it.
PPTP
Cable or DSL, always on. Some
European ISPs require a PPTP
tunnel to authenticate their
network.
KPN (Netherlands), Austria
Telecom
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104
APPENDIX B: ISP INFORMATION
Static
DSL Modem, always on. Need to CableSpeed, Cnet, Direct Link,
enter ALL IP information from ISP Drizzle, DSL Extreme, Earthlink
in the Static IP address section of Wireless, Fast Point, Flashcom,
(DSL)
the Internet Settings page.
GTE-WhirlWind, Heavenet, HSA
Corp, I-55, InterAccess, LinkLine,
Mission, Nauticom, NAS, Omitel,
Onterra, Phatpipe, Rhythms,
Speakeasy, Sterling, XO, Zyan
Static
Cable Modem, Always on, ISP
assigns specific IP information
which needs to be entered on the
“Fixed IP” page of the Router.
Cox Cable, Sprint, US Cable,
Cable-Cable
(Cable)
*Bell includes Bell Advantage, Bell Canada, Bell South, PacBell and
Southwestern Bell.
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TECHNICAL SPECIFICATIONS
C
This section lists the technical specifications for the OfficeConnect
Cable/DSL Router.
OfficeConnect
Cable/DSL Router
Interfaces
Cable/DSL modem connection — 10 Mbps/100 Mbps dual speed
Ethernet port (10BASE-T/100BASE-TX)
LAN connection — four 10Mbps/100Mbps dual speed Ethernet ports
(10BASE-T/100BASE-TX)
Operating Temperature
0 °C to 40 °C (32 °F to 105 °F)
Power
7VA, 23.9 BThU/hr
Humidity
0 % to 90 % (non-condensing) humidity
Dimensions
■
■
■
Width = 220 mm (8.7 in.)
Depth = 135.4 mm (5.2 in.)
Height = 24.2 mm (1 in.)
Weight
535 g (1.3 lb)
Standards Functional:
ISO 8802/3
IEEE 802.3
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106
APPENDIX C: TECHNICAL SPECIFICATIONS
Safety:
UL60950
EN 60950
CSA 22.2 #60950
IEC 60950
EMC:
EN 55022 Class B
EN 55024
FCC Part 15 Class B*
ICES-003 Class B
CNS 13438 Class A
ETSI EN 301 489–17
Environmental: EN 60068 (IEC 68)
*See “Regulatory Notices” on page 129 for conditions of operation.
System Requirements Operating Systems
The Router will support the following Operating Systems:
Windows 95/98
Windows NT 4.0
■
■
■
■
■
■
■
Windows ME
Windows 2000
Windows XP
Mac OS 8.5 or higher
Unix
Ethernet Performance The Router complies to the IEEE 802.3i, u and x specifications.
Cable Specifications The Router supports the following cable types and maximum lengths:
■
Category 3 (Ethernet) or Category 5 (Fast Ethernet or Dual Speed
Ethernet) Twisted Pair — shielded and unshielded cable types.
■
Maximum cable length of 100m (327.86 ft).
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SAFETY INFORMATION
D
Important Safety
Information
WARNING: Warnings contain directions that you must follow for your
personal safety. Follow all directions carefully.
You must read the following safety information carefully before you
install or remove the unit:
WARNING: Exceptional care must be taken during installation and
removal of the unit.
WARNING: To ensure compliance with international safety standards,
only use the power adapter that is supplied with the unit.
WARNING: The socket outlet must be near to the unit and easily
accessible. You can only remove power from the unit by disconnecting
the power cord from the outlet.
WARNING: This unit operates under SELV (Safety Extra Low Voltage)
conditions according to IEC 60950. The conditions are only maintained
if the equipment to which it is connected also operates under SELV
conditions.
WARNING: There are no user-replaceable fuses or user-serviceable
parts inside the Router. If you have a physical problem with the unit
that cannot be solved with problem solving actions in this guide,
contact your supplier.
WARNING: Disconnect the power adapter before moving the unit.
WARNING: RJ-45 ports. These are shielded RJ-45 data sockets. They
cannot be used as telephone sockets. Only connect RJ-45 data
connectors to these sockets.
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108
APPENDIX D: SAFETY INFORMATION
Wichtige
Sicherheitshinweise
VORSICHT: Warnhinweise enthalten Anweisungen, die Sie zu Ihrer
eigenen Sicherheit befolgen müssen. Alle Anweisungen sind sorgfältig
zu befolgen.
Sie müssen die folgenden Sicherheitsinformationen sorgfältig
durchlesen, bevor Sie das Geräts installieren oder ausbauen:
VORSICHT: Bei der Installation und beim Ausbau des Geräts ist mit
höchster Vorsicht vorzugehen.
VORSICHT: Aufgrund von internationalen Sicherheitsnormen darf das
Gerät nur mit dem mitgelieferten Netzadapter verwendet werden.
VORSICHT: Die Netzsteckdose muß in der Nähe des Geräts und leicht
zugänglich sein. Die Stromversorgung des Geräts kann nur durch
Herausziehen des Gerätenetzkabels aus der Netzsteckdose
unterbrochen werden.
VORSICHT: Der Betrieb dieses Geräts erfolgt unter den
SELV-Bedingungen (Sicherheitskleinstspannung) gemäß IEC 60950.
Diese Bedingungen sind nur gegeben, wenn auch die an das Gerät
angeschlossenen Geräte unter SELV-Bedingungen betrieben werden.
VORSICHT: Es sind keine von dem Benutzer zu ersetzende oder zu
wartende Teile in dem Gerät vorhanden. Wenn Sie ein Problem mit dem
Router haben, das nicht mittels der Fehleranalyse in dieser Anleitung
behoben werden kann, setzen Sie sich mit Ihrem Lieferanten in
Verbindung.
VORSICHT: Vor dem Ausbau des Geräts das Netzadapterkabel
herausziehen.
VORSICHT: RJ-45-Anschlüsse. Dies sind abgeschirmte
RJ-45-Datenbuchsen. Sie können nicht als Telefonanschlußbuchsen
verwendet werden. An diesen Buchsen dürfen nur RJ-45-Datenstecker
angeschlossen werden.
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109
Consignes
importantes de
sécurité
AVERTISSEMENT: Les avertissements présentent des consignes que
vous devez respecter pour garantir votre sécurité personnelle. Vous
devez respecter attentivement toutes les consignes.
Nous vous demandons de lire attentivement les consignes suivantes de
sécurité avant d’installer ou de retirer l’appareil:
AVERTISSEMENT: Faites très attention lors de l'installation et de la
dépose du groupe.
AVERTISSEMENT: Pour garantir le respect des normes internationales
de sécurité, utilisez uniquement l'adaptateur électrique remis avec cet
appareil.
AVERTISSEMENT: La prise secteur doit se trouver à proximité de
l’appareil et son accès doit être facile. Vous ne pouvez mettre l’appareil
hors circuit qu'en débranchant son cordon électrique au niveau de
cette prise.
AVERTISSEMENT: L’appareil fonctionne à une tension extrêmement
basse de sécurité qui est conforme à la norme CEI 60950. Ces
conditions ne sont maintenues que si l'équipement auquel il est
raccordé fonctionne dans les mêmes conditions.
AVERTISSEMENT: Il n’y a pas de parties remplaceables par les
utilisateurs ou entretenues par les utilisateurs à l’intérieur du moyeu. Si
vous avez un problème physique avec le moyeu qui ne peut pas être
résolu avec les actions de la résolution des problèmes dans ce guide,
contacter votre fournisseur.
AVERTISSEMENT: Débranchez l'adaptateur électrique avant de retirer
cet appareil.
AVERTISSEMENT: Ports RJ-45. Il s'agit de prises femelles blindées de
données RJ-45. Vous ne pouvez pas les utiliser comme prise de
téléphone. Branchez uniquement des connecteurs de données RJ-45 sur
ces prises femelles.
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110
APPENDIX D: SAFETY INFORMATION
Información de
seguridad
importante
ADVERTENCIA: Las advertencias contienen indicaciones que debe
respetar por su seguridad personal. Siga las indicaciones con cuidado.
Antes de instalar o retirar la unidad, debe leer detenidamente la siguiente
información de seguridad.
ADVERTENCIA: Debe tener especial cuidado durante la instalación y
retirada de la unidad.
ADVERTENCIA: Para garantizar el cumplimiento de las normas
internacionales de seguridad, utilice únicamente el adaptador de
corriente suministrado con la unidad.
ADVERTENCIA: El enchufe debe estar cerca de la unidad y ser de fácil
acceso. La única forma de cortar la alimentación de la unidad consiste en
desconectar el cable eléctrico de la toma de corriente.
ADVERTENCIA: Esta unidad funciona en condiciones SELV (voltaje
extrabajo de seguridad) de conformidad con la norma IEC 950. Las
condiciones sólo se mantienen si el equipo al que esté conectada la
unidad también funciona en condiciones SELV.
ADVERTENCIA: La unidad no contiene fusibles ni piezas que el usuario
pueda sustituir o reparar. Si tiene un problema físico con la unidad que no
se pueda resolver mediante las acciones de solución de problemas de esta
guía, póngase en contacto con su proveedor.
ADVERTENCIA: Desconecte el adaptador de corriente antes de mover la
unidad.
ADVERTENCIA: Puertos RJ-45. Son conectores de datos RJ-45
blindados. No pueden utilizarse como tomas de teléfono tradicionales
estándar ni para conectar la unidad a una central de conmutación PBX
tradicional ni a una red telefónica pública. Conecte sólo conectores de
datos RJ-45, sistemas de telefonía de red local o teléfonos de red local a
estas tomas.
Pueden conectarse cables de datos blindados o sin blindar con clavijas
blindadas o sin blindar a estos conectores de datos.
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OBTAINING SUPPORT FOR YOUR
PRODUCT
E
Register Your
Product to Gain
Service Benefits
To take advantage of warranty and other service benefits, you must first
register your product at http://eSupport.3com.com/. 3Com eSupport
services are based on accounts that you create or have authorization to
access. First time users must apply for a user name and password that
provides access to a number of eSupport features including Product
Registration, Repair Services, and Service Request.
Purchase
Value-Added
Services
To enhance response times or extend warranty benefits, contact 3Com or
your authorized 3Com reseller. Value-added services can include 24x7
telephone technical support, software upgrades, onsite assistance or
advance hardware replacement. Experienced engineers are available to
manage your installation with minimal disruption to your network. Expert
assessment and implementation services are offered to fill resource gaps
and ensure the success of your networking projects. More information on
3Com Extended Warranty and Professional Services is available at
http://www.3com.com/
Contact your authorized 3Com reseller or 3Com for additional product
and support information.
Troubleshoot
Online
You will find support tools posted on the 3Com web site at
http://www.3com.com/
■
3Com Knowledgebase helps you troubleshoot 3Com products. This
query-based interactive tool is located at
http://knowledgebase.3com.com and contains thousands of
technical solutions written by 3Com support engineers.
■
Connection Assistant helps you install, configure and troubleshoot
3Com desktop and server NICs, wireless cards and Bluetooth devices.
This diagnostic software is located at:
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112
APPENDIX E: OBTAINING SUPPORT FOR YOUR PRODUCT
http://www.3com.com/prodforms/software/connection_assistan
t/ca_thankyou.html
Access Software
Downloads
Software Updates are the bug fix / maintenance releases for the version
of software initially purchased with the product. In order to access these
Software Updates you must first register your product on the 3Com web
site at http://eSupport.3com.com/.
First time users will need to apply for a user name and password. A link to
software downloads can be found at http://eSupport.3com.com/, or
under the Product Support heading at http://www.3com.com/
Software Upgrades are the software releases that follow the software
version included with your original product. In order to access upgrades
and related documentation you must first purchase a service contract
from 3Com or your reseller.
Contact Us
3Com offers telephone, e-mail and internet access to technical support
and repair services. To access these services for your region, use the
appropriate telephone number, URL or e-mail address from the list below.
You will find a current directory of support telephone numbers posted on
the 3Com web site at http://csoweb4.3com.com/contactus/
Telephone Technical To obtain telephone support as part of your warranty and other service
Support and Repair
benefits, you must first register your product at
http://eSupport.3com.com/
When you contact 3Com for assistance, please have the following
information ready:
■
■
■
■
Product model name, part number, and serial number
A list of system hardware and software, including revision level
Diagnostic error messages
Details about recent configuration changes, if applicable
To send a product directly to 3Com for repair, you must first obtain a
return authorization number (RMA). Products sent to 3Com, without
authorization numbers clearly marked on the outside of the package, will
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Telephone Technical Support and Repair 113
be returned to the sender unopened, at the sender’s expense. If your
product is registered and under warranty, you can obtain an RMA
number online at http://eSupport.3com.com/. First time users will
need to apply for a user name and password.
Telephone numbers are correct at the time of publication. Find a current
directory of support telephone numbers posted on the 3Com web site at
http://csoweb4.3com.com/contactus/
Country
Telephone Number
Country
Telephone Number
Asia, Pacific Rim Telephone Technical Support and Repair
Australia
Hong Kong
India
1 800 678 515
800 933 486
+61 2 9424 5179 or
000800 650 1111
001 803 61009
00531 616 439 or
03 3507 5984
Philippines
1235 61 266 2602 or
1800 1 888 9469
800 810 3033
800 6161 463
080 333 3308
P.R. of China
Singapore
S. Korea
Taiwan
Thailand
Indonesia
Japan
00801 611 261
001 800 611 2000
Malaysia
New Zealand
Pakistan
1800 801 777
0800 446 398
+61 2 9937 5083
You can also obtain support in this region using the following e-mail: [email protected]
Or request a repair authorization number (RMA) by fax using this number:
+ 65 543 6348
Europe, Middle East, and Africa Telephone Technical Support and Repair
From anywhere in these
regions, call:
+44 (0)1442 435529
From the following countries, you may use the numbers shown:
Austria
Belgium
Denmark
Finland
France
Germany
Hungary
Ireland
Israel
01 7956 7124
070 700 770
7010 7289
01080 2783
0825 809 622
01805 404 747
06800 12813
1407 3387
Luxembourg
Netherlands
Norway
342 0808128
0900 777 7737
815 33 047
00800 441 1357
707 200 123
0800 995 014
9 021 60455
07711 14453
08488 50112
0870 909 3266
Poland
Portugal
South Africa
Spain
Sweden
Switzerland
U.K.
1800 945 3794
199 161346
Italy
You can also obtain support in this region using the following URL:
http://emea.3com.com/support/email.html
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114
APPENDIX E: OBTAINING SUPPORT FOR YOUR PRODUCT
Country
Telephone Number
Country
Telephone Number
Latin America Telephone Technical Support and Repair
Antigua
Argentina
Aruba
Bahamas
Barbados
Belize
Bermuda
Bonaire
Brazil
Cayman
Chile
Colombia
Costa Rica
Curacao
Ecuador
Dominican Republic
1 800 988 2112
0 810 444 3COM
1 800 998 2112
1 800 998 2112
1 800 998 2112
52 5 201 0010
1 800 998 2112
1 800 998 2112
0800 13 3COM
Guatemala
Haiti
Honduras
Jamaica
Martinique
Mexico
Nicaragua
Panama
Paraguay
Peru
Puerto Rico
Salvador
Trinidad and Tobago
Uruguay
Venezuela
Virgin Islands
AT&T +800 998 2112
57 1 657 0888
AT&T +800 998 2112
1 800 998 2112
571 657 0888
01 800 849CARE
AT&T +800 998 2112
AT&T +800 998 2112
54 11 4894 1888
AT&T +800 998 2112
1 800 998 2112
AT&T +800 998 2112
1 800 998 2112
AT&T +800 998 2112
AT&T +800 998 2112
57 1 657 0888
1 800 998 2112
AT&T +800 998 2112
AT&T +800 998 2112
AT&T +800 998 2112
1 800 998 2112
AT&T +800 998 2112
AT&T +800 998 2112
You can also obtain support in this region using the following:
Spanish speakers, enter the URL:
http://lat.3com.com/lat/support/form.html
Portuguese speakers, enter the URL:
http://lat.3com.com/br/support/form.html
English speakers in Latin America should send e-mail to:
US and Canada Telephone Technical Support and Repair
1 800 876 3266
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END USER SOFTWARE LICENSE
AGREEMENT
F
IMPORTANT: READ BEFORE INSTALLING THE SOFTWARE
3Com END USER SOFTWARE LICENSE AGREEMENT
YOU SHOULD CAREFULLY READ THE FOLLOWING TERMS AND CONDITIONS BEFORE DOWNLOADING, INSTALLING AND USING THIS
PRODUCT, THE USE OF WHICH IS LICENSED BY 3COM CORPORATION (“3COM”) TO ITS CUSTOMERS FOR THEIR USE ONLY AS SET FORTH
BELOW. DOWNLOADING, INSTALLING OR OTHERWISE USING ANY PART OF THE SOFTWARE OR DOCUMENTATION INDICATES THAT YOU
ACCEPT THESE TERMS AND CONDITIONS. IF YOU DO NOT AGREE TO THE TERMS AND CONDITIONS OF THIS AGREEMENT, DO NOT
DOWNLOAD, INSTALL OR OTHERWISE USE THE SOFTWARE OR DOCUMENTATION, DO NOT CLICK ON THE "I AGREE" OR SIMILAR BUTTON.
AND IF YOU HAVE RECEIVED THE SOFTWARE AND DOCUMENTATION ON PHYSICAL MEDIA, RETURN THE ENTIRE PRODUCT WITH THE
SOFTWARE AND DOCUMENTATION UNUSED TO THE SUPPLIER WHERE YOU OBTAINED IT.
LICENSE: 3Com grants you a nonexclusive, nontransferable (except as specified herein) license to use the accompanying software program(s) in
executable form (the “Software”) and accompanying documentation (the “Documentation”), subject to the terms and restrictions set forth in this
Agreement. You are not permitted to lease, rent, distribute or sublicense (except as specified herein) the Software or Documentation or to use the
Software or Documentation in a time-sharing arrangement or in any other unauthorized manner. Further, no license is granted to you in the human
readable code of the Software (source code). Except as provided below, this Agreement does not grant you any rights to patents, copyrights, trade
secrets, trademarks, or any other rights with respect to the Software or Documentation.
Subject to the restrictions set forth herein, the Software is licensed to be used on any workstation or any network server owned by or leased to you, for
your internal use, provided that the Software is used only in connection with this 3Com product. You may reproduce and provide one (1) copy of the
Software and Documentation for each such workstation or network server on which the Software is used as permitted hereunder. Otherwise, the
Software and Documentation may be copied only as essential for backup or archive purposes in support of your use of the Software as permitted
hereunder. Each copy of the Software and Documentation must contain 3Com’s and its licensors’ proprietary rights and copyright notices in the same
form as on the original. You agree not to remove or deface any portion of any legend provided on any licensed program or documentation delivered to
you under this Agreement.
ASSIGNMENT; NO REVERSE ENGINEERING: You may transfer the Software, Documentation and the licenses granted herein to another party in the
same country in which you obtained the Software and Documentation if the other party agrees in writing to accept and be bound by the terms and
conditions of this Agreement. If you transfer the Software and Documentation, you must at the same time either transfer all copies of the Software and
Documentation to the party or you must destroy any copies not transferred. Except as set forth above, you may not assign or transfer your rights under
this Agreement.
Modification, reverse engineering, reverse compiling, or disassembly of the Software is expressly prohibited. However, if you are a European Union (ìEUî)
resident, information necessary to achieve interoperability of the Software with other programs within the meaning of the EU Directive on the Legal
Protection of Computer Programs is available to you from 3Com upon written request.
EXPORT: This product, Software and/or technical data (collectively "Product") may contain encryption. This Product is subject to U.S. and EU export
control laws and regulations and may be subject to export or import regulations in other countries, including controls on encryption products. You
agree that you will not export, reexport or transfer the Product (or any copies thereof) or any products utilizing the Product in violation of any applicable
laws or regulations of the United States or the country where you legally obtained it. You are responsible for obtaining any licenses to export, reexport,
transfer or import the Product.
In addition to the above, the Product may not be used by, or exported or reexported to (i) any U.S.- or EU- sanctioned or embargoed country, or to
nationals or residents of such countries; or (ii) to any person, entity, organization or other party identified on the U.S. Department of Commerce’s Table
of Denial Orders or the U.S. Department of Treasury’s lists of "Specially Designated Nationals and Blocked Persons," as published and revised from time
to time; (iii) to any party engaged in nuclear, chemical/biological weapons or missile proliferation activities, unless authorized by U.S. and local (as
required) law or regulations.
TRADE SECRETS; TITLE: You acknowledge and agree that the structure, sequence and organization of the Software are the valuable trade secrets of
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116
APPENDIX F: END USER SOFTWARE LICENSE AGREEMENT
3Com and its suppliers. You agree to hold such trade secrets in confidence. You further acknowledge and agree that ownership of, and title to, the
Software and Documentation and all subsequent copies thereof regardless of the form or media are held by 3Com and its suppliers.
UNITED STATES GOVERNMENT LEGENDS: The Software, Documentation and any other technical data provided hereunder is commercial in nature
and developed solely at private expense. The Software is delivered as ìCommercial Computer Softwareî as defined in DFARS 252.227-7014 (June 1995)
or as a commercial item as defined in FAR 2.101(a) and as such is provided with only such rights as are provided in this Agreement, which is 3Com’s
standard commercial license for the Software. Technical data is provided with limited rights only as provided in DFAR 252.227-7015 (Nov. 1995) or FAR
52.227-14 (June 1987), whichever is applicable.
TERM AND TERMINATION: The licenses granted hereunder are perpetual unless terminated earlier as specified below. You may terminate the licenses
and this Agreement at any time by destroying the Software and Documentation together with all copies and merged portions in any form. The licenses
and this Agreement will also terminate immediately if you fail to comply with any term or condition of this Agreement. Upon such termination you
agree to destroy the Software and Documentation, together with all copies and merged portions in any form.
LIMITED WARRANTIES AND LIMITATION OF LIABILITY: All warranties and limitations of liability applicable to the Software are as stated on the
Limited Warranty Card or in the product manual, whether in paper or electronic form, accompanying the Software. Such warranties and limitations of
liability are incorporated herein in their entirety by this reference.
GOVERNING LAW: This Agreement shall be governed by the laws of the State of California, U.S.A. excluding its conflicts of laws principles and
excluding the United Nations Convention on Contracts for the International Sale of Goods.
SEVERABILITY: In the event any provision of this Agreement is found to be invalid, illegal or unenforceable, the validity, legality and enforceability of
any of the remaining provisions shall not in any way be affected or impaired and a valid, legal and enforceable provision of similar intent and economic
impact shall be substituted therefor.
ENTIRE AGREEMENT: This Agreement sets forth the entire understanding and agreement between you and 3Com and supersedes all prior
agreements, whether written or oral, with respect to the Software and Documentation, and may be amended only in a writing signed by both parties.
Should you have any questions concerning this Agreement or if you desire to contact 3Com for any reason, please contact the 3Com subsidiary serving
your country, or write: 3Com Corporation, Customer Support Information, 350 Campus Drive, Marlborough, MA 01752-3064
3Com Corporation
350 Campus Drive,
Marlborough, MA 01752-3064
Copyright © 2004 3Com Corporation and its licensors. All rights reserved. 3Com is a registered trademark of 3Com Corporation.
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GLOSSARY
10BASE-T The IEEE specification for 10 Mbps Ethernet over Category 3, 4 or 5
twisted pair cable.
100BASE-TX The IEEE specification for 100 Mbps Fast Ethernet over Category 5
twisted-pair cable.
Access Point An Access Point is a device through which wireless clients connect to
other wireless clients and which acts as a bridge between wireless clients
and a wired network, such as Ethernet. Wireless clients can be moved
anywhere within the coverage area of the access point and still connect
with each other. If connected to an Ethernet network, the access point
monitors Ethernet traffic and forwards appropriate Ethernet messages to
the wireless network, while also monitoring wireless client radio traffic
and forwarding wireless client messages to the Ethernet LAN.
Auto-negotiation Some devices in the range support auto-negotiation. Auto-negotiation is
where two devices sharing a link, automatically configure to use the best
common speed. The order of preference (best first) is: 100BASE-TX full
duplex, 100BASE-TX half duplex, 10BASE-T full duplex, and 10BASE-T
half duplex. Auto-negotiation is defined in the IEEE 802.3 standard for
Ethernet and is an operation that takes place in a few milliseconds.
Bandwidth The information capacity, measured in bits per second, that a channel can
transmit. The bandwidth of Ethernet is 10 Mbps, the bandwidth of Fast
Ethernet is 100 Mbps. The bandwidth for 802.11b wireless is 11Mbps.
Category 3 Cables One of five grades of Twisted Pair (TP) cabling defined by the EIA/TIA-586
standard. Category 3 is voice grade cable and can only be used in
Ethernet networks (10BASE-T) to transmit data at speeds of up to 10
Mbps.
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118
GLOSSARY
Category 5 Cables One of five grades of Twisted Pair (TP) cabling defined by the EIA/TIA-586
standard. Category 5 can be used in Ethernet (10BASE-T) and Fast
Ethernet networks (100BASE-TX) and can transmit data up to speeds of
100 Mbps. Category 5 cabling is better to use for network cabling than
Category 3, because it supports both Ethernet (10 Mbps) and Fast
Ethernet (100 Mbps) speeds.
Client The term used to described the desktop PC that is connected to your
network.
DHCP Dynamic Host Configuration Protocol. This protocol automatically assigns
an IP address for every computer on your network. Windows 95,
Windows 98 and Windows NT 4.0 contain software that assigns IP
addresses to workstations on a network. These assignments are made by
the DHCP server software that runs on Windows NT Server, and Windows
95 and Windows 98 will call the server to obtain the address. Windows
98 will allocate itself an address if no DHCP server can be found.
DDNS Dynamic Domain Name Server. A method that enables Internet users to
tie their domain name(s) to computers or servers. DDNS enables a domain
name to follow an IP address automatically when the IP address changes.
DNS Server Address DNS stands for Domain Name System, which allows Internet host
computers to have a domain name (such as 3com.com) and one or more
IP addresses (such as 192.34.45.8). A DNS server keeps a database of
host computers and their respective domain names and IP addresses, so
that when a domain name is requested (as in typing “3com.com” into
your Internet browser), the user is sent to the proper IP address. The DNS
server address used by the computers on your home network is the
location of the DNS server your ISP has assigned.
DSL modem DSL stands for digital subscriber line. A DSL modem uses your existing
phone lines to send and receive data at high speeds.
Encryption A method for providing a level of security to wireless data transmissions.
The Router uses two levels of encryption; 40/64 bit and 128 bit. 128 bit is
a more powerful level of encryption than 40/64 bit.
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GLOSSARY
119
Ethernet A LAN specification developed jointly by Xerox, Intel and Digital
Equipment Corporation. Ethernet networks use CSMA/CD to transmit
packets at a rate of 10 Mbps over a variety of cables.
Ethernet Address See MAC address.
Fast Ethernet An Ethernet system that is designed to operate at 100 Mbps.
Firewall Electronic protection that prevents anyone outside of your network from
seeing your files or damaging your computers.
Full Duplex A system that allows packets to be transmitted and received at the same
time and, in effect, doubles the potential throughput of a link.
Half Duplex A system that allows packets to transmitted and received, but not at the
same time. Contrast with full duplex.
Hub A device that regenerates LAN traffic so that the transmission distance of
that signal can be extended. Hubs are similar to repeaters, in that they
connect LANs of the same type; however they connect more LANs than a
repeater and are generally more sophisticated.
IEEE Institute of Electrical and Electronics Engineers. This American
organization was founded in 1963 and sets standards for computers and
communications.
IETF Internet Engineering Task Force. An organization responsible for
providing engineering solutions for TCP/IP networks. In the network
management area, this group is responsible for the development of the
SNMP protocol.
Infrastructure mode Infrastructure mode is the wireless configuration supported by the Router.
You will need to ensure all of your clients are set up to use infrastructure
mode in order for them to communicate with the Access Point built into
your Router. (see also Ad Hoc mode)
IP Internet Protocol. IP is a layer 3 network protocol that is the standard for
sending data through a network. IP is part of the TCP/IP set of protocols
that describe the routing of packets to addressed devices. An IP address
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120
GLOSSARY
consists of 32 bits divided into two or three fields: a network number and
a host number or a network number, a subnet number, and a host
number.
IP Address Internet Protocol Address. A unique identifier for a device attached to a
network using TCP/IP. The address is written as four octets separated with
periods (full-stops), and is made up of a network section, an optional
subnet section and a host section.
ISP Internet Service Provider. An ISP is a business that provides connectivity to
the Internet for individuals and other businesses or organizations.
LAN Local Area Network. A network of end stations (such as PCs, printers,
servers) and network devices (hubs and switches) that cover a relatively
small geographic area (usually not larger than a floor or building). LANs
are characterized by high transmission speeds over short distances (up to
1000 metres).
MAC Media Access Control. A protocol specified by the IEEE for determining
which devices have access to a network at any one time.
MAC Address Media Access Control Address. Also called the hardware or physical
address. A layer 2 address associated with a particular network device.
Most devices that connect to a LAN have a MAC address assigned to
them as they are used to identify other devices in a network. MAC
addresses are 6 bytes long.
NAT Network Address Translation. NAT enables all the computers on your
network to share one IP address. The NAT capability of the Router allows
you to access the Internet from any computer on your home network
without having to purchase more IP addresses from your ISP.
Network A Network is a collection of computers and other computer equipment
that are connected for the purpose of exchanging information or sharing
resources. Networks vary in size, some are within a single room, others
span continents.
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GLOSSARY
121
Network Interface A circuit board installed into a piece of computing equipment, for
Card (NIC) example, a computer, that enables you to connect it to the network. A
NIC is also known as an adapter or adapter card.
Protocol A set of rules for communication between devices on a network. The
rules dictate format, timing, sequencing and error control.
PPPoE Point-to-Point Protocol over Ethernet. Point-to-Point Protocol is a method
of data transmission originally created for dial-up connections; PPPoE is
for Ethernet connections.
PPTP Point-to-Point Tunneling Protocol is a method of secure data transmission
between two remote sites over the internet.
RIP Routing Information Protocol. RIP allows an administrator to set up
routing information on one RIP enabled device, and have that routing
information replicated to all RIP enabled devices on the network.
RJ-45 A standard connector used to connect Ethernet networks. The “RJ”
stands for “registered jack”.
Router A device that acts as a central hub by connecting to each computer's
network interface card and managing the data traffic between the local
network and the Internet.
Server A computer in a network that is shared by multiple end stations. Servers
provide end stations with access to shared network services such as
computer files and printer queues.
SPI Stateful Packet Inspection. This feature requires the firewall to remember
what outgoing requests have been sent and only allow responses to
those requests back through the firewall. This way, un-requested
attempts to access the network will be denied.
SSID Service Set Identifier. Some vendors of wireless products use SSID
interchangeably with ESSID.
Subnet Address An extension of the IP addressing scheme that allows a site to use a single
IP network address for multiple physical networks.
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122
GLOSSARY
Subnet mask A subnet mask, which may be a part of the TCP/IP information provided
by your ISP, is a set of four numbers configured like an IP address. It is
used to create IP address numbers used only within a particular network
(as opposed to valid IP address numbers recognized by the Internet,
which must assigned by InterNIC).
Subnets A network that is a component of a larger network.
Switch A device that interconnects several LANs to form a single logical LAN that
comprises of several LAN segments. Switches are similar to bridges, in
that they connect LANs of a different type; however they connect more
LANs than a bridge and are generally more sophisticated.
TCP/IP Transmission Control Protocol/Internet Protocol. This is the name for two
of the most well-known protocols developed for the interconnection of
networks. Originally a UNIX standard, TCP/IP is now supported on almost
all platforms, and is the protocol of the Internet.
TCP relates to the content of the data travelling through a network —
ensuring that the information sent arrives in one piece when it reaches its
destination. IP relates to the address of the end station to which data is
being sent, as well as the address of the destination network.
Traffic The movement of data packets on a network.
universal plug and Universal plug and play is a system which allows compatible applications
play to read some of their settings from the Router. This allows them to
automatically configure some, or all, of their settings and need less user
configuration.
URL Filter A URL Filter is a feature of a firewall that allows it to stop its clients form
browsing inappropriate Web sites.
VPN Virtual Private Network. A VPN is a private network where the data is
passed across a public network infrastructure such as the Internet. The
data is kept private by using encryption.
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GLOSSARY
123
WAN Wide Area Network. A network that connects computers located in
geographically separate areas (for example, different buildings, cities, or
countries). The Internet is an example of a wide area network.
WEP Wired Equivalent Privacy. A shared key encryption mechanism for wireless
networking. Encryption strength is 40/64 bit or 128 bit.
Wizard A Windows application that automates a procedure such as installation
or configuration.
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124
GLOSSARY
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INDEX 125
F
INDEX
feedback 90
Firewall
client IP filters 57
DMZ 63
MAC address filtering 62
special applications 54
SPI 51
A
Addresses
virtual servers 56
IP 99
admin password
administration
remote 81
H
Advanced
RIP 83
I
Internet
addresses 99
B
Internet Addressing Mode 29
Internet Settings
PPPoE 42
backup settings 74
C
PPTP 43
Cable Specifications 106
client IP filters 57
static IP address 43
Intrusion Detection 52
Conventions
L
L2TP 43, 47
LED 14
logs 88
text, About This Guide 8
D
M
DDNS 86
MAC Address 30, 36, 44, 50
configuring 50
MAC address filtering 62
DHCP 37, 101
DHCP Server 23
DMZ 63
DNS 22, 49
DoS attacks 51
DOS detect criteria
configuring 54
Dynamic IP Address 30, 42
N
NAT 79
Network
addresses 99
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126
P
U
ping blocking 81
PPPoE 24, 31, 42
PPTP 43
upgrade 75
V
R
virtual servers 56
remote administration 81
Reset to Factory Defaults 93
reset to factory defaults 73
restart router 73
RIP 83
W
WAN 29
WAN ping blocking 81
Web Proxy 24
routing 82
RIP 83
static route 82
S
Setup Wizard 25
SNMP 71
technical 105
SPI 51
Static Addressing 101
Static IP Address 43
static route 82
status 86
Summary 38
support 89
Support Links 89
T
TCP/IP 21, 23, 37, 99
technical
specifications 105
standards 105
Time Zone 27
time zone
configuring 77
traffic metering 88
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REGULATORY NOTICES
FCC STATEMENT
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules, and the Canadian Department of Communications Equipment Standards entitled,
“Digital Apparatus,” ICES-003. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that interference will not occur in a particular
installation.
FCC DECLARATION OF
CONFORMITY
We declare under our sole responsibility that the
Model:
Description:
3CR858-91
Cable/DSL Router
to which this declaration relates, is in conformity with the following standards or other normative documents:
■
■
ANSI C63.4-1992 Methods of Measurement
Federal Communications Commission 47 CFR Part 15, subpart B
15.107 (a)Class B Conducted Limits
15.109 (a)Class B Radiated Emissions Limits
■
15.107 (e)Class B Conducted Limits
15.109 (g)Class B Radiated Emissions Limits
CSA STATEMENT
This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment
Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du
Canada.
CE STATEMENT (EUROPE)
VCCI STATEMENT
This product complies with the European Low Voltage Directive 73/23/EEC and EMC Directive 89/336/EEC as
amended by European Directive 93/68/EEC.
FCC
CAUTION: To assure continued compliance, (for example, use only shielded interface cables when connecting
to computer or peripheral devices) any changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate this equipment
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3Com Corporation, Corporate Headquarters,
Copyright © 2004 3Com Corporation. All rights reserved.
3Com and are registered trademarks of 3Com
Corporation. All other company and product names may
be trademarks of their respective companies.
350 Campus Drive, Marlborough, MA
USA 01752-3064
To learn more about 3Com products and services,
visit our World Wide Web site at www.3com.com
All specifications are subject to change without notice.
DUA8589-1AAA01
Rev. 01
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