OfficeConnect ADSL Wireless 11g
Firewall Router
User Guide
3CRWE754G72-A
3CRWE754G72-B
WL-540A
WL-540B
http://www.3com.com/
Part No. DUA-0075-4AAA01
Rev. 01
Published January 2004
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Naming Convention
Conventions
1 INTRODUCING THE ROUTER
OfficeConnect ADSL Wireless11g Firewall Router 11
Router Advantages 13
Rear Panel 15
2 HARDWARE INSTALLATION
Introduction 17
Safety Information 17
Obtaining an IP Address Automatically 23
Windows 2000 23
Windows XP 25
Windows 95/98/ME 25
Macintosh 25
Disabling PPPoE and PPTP Client Software 26
Disabling Web Proxy 26
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SNMP 63
Backup/Restore Settings 66
Upgrade 66
Admin Password 67
Logs 69
Basic Connection Checks 71
Browsing to the Router Configuration Screens 71
Connecting to the Internet 72
The Internet Protocol Suite 77
Managing the Router over the Network 77
IP Addresses and Subnet Masks 77
How does a Device Obtain an IP Address and Subnet Mask? 79
DHCP Addressing 79
Static Addressing 79
Auto-IP Addressing 79
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OfficeConnect ADSL Wireless 11g Firewall Router 81
Standards 82
D OBTAINING SUPPORT FOR YOUR PRODUCT
Register Your Product to Gain Service Benefits 91
Troubleshoot Online 91
Access Software Downloads 92
Telephone Technical Support and Repair 92
GLOSSARY
INDEX
REGULATORY NOTICES FOR THE OFFICECONNECT ADSL
WIRELESS 11G FIREWALL ROUTER
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ABOUT THIS GUIDE
This guide describes how to install and configure the OfficeConnect ADSL
Wireless 11g Firewall Router (3CRWE754G72-A/B).
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 ADSL 11g Wireless 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 ADSL Wireless 11g Firewall
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 ADSL Wireless 11g Firewall Router User Guide
Part Number DUA0075-4AAA01
Page 24
Do not use this e-mail address for technical support questions. For
information about contacting Technical Support, please refer to the
Support and Safety Information sheet.
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.
Wireless11g
Firewall Router
provide a cost-effective means of sharing a single broadband Internet
connection amongst several wired and wireless computers. The Router
also provides protection in the form of an electronic “firewall” preventing
anyone outside of your network from seeing your files or damaging your
computers. The Router can also prevent your users from accessing Web
sites which you find unsuitable.
Figure 1 shows an example network without a Router. In this network,
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 Gateway
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 Wireless DSL Router
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Router Advantages
13
Router Advantages
The advantages of the Router include:
■
■
■
Shared Internet connection for both wired and wireless computers
High speed 802.11g wireless networking
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 wireless network traffic
Package Contents
The Router kit includes the following items:
■
■
■
■
■
■
■
■
One OfficeConnect ADSL Wireless11g Firewall Router
One power adapter for use with the Router
Four rubber feet
One Telephone Cable
One CD-ROM containing 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.
■
■
■
An 802.11b or 802.11g wireless NIC.
An active ADSL subscription and connection.
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
2
4
5
1
3
3CRWE754G72-A
DSL
LAN Status
Power SYNC Online WLAN
1
2
3
4
Green = Link, Flash = Activity
OfficeConnect ADSL Wireless 11g Firewall Router
1 Power LED
Green
Indicates that the Router is powered on.
2 DSL Sync LED
Green
If the LED is on it indicates that DSL connection is present. This LED’s
flashes during configuration at power up.
3 DSL Online LED
Green
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Rear Panel
15
If this LED illuminates successful Username/Password has been
authenticated with your ISP.
4 Wireless LAN (WLAN) Status LED
Green
If the LED is on it indicates that wireless networking is enabled. If the LED
is flashing, the link is OK and data is being transmitted or received. If the
LED is off, the Wireless LAN has been disabled in the Router, or there is a
5 Four LAN Status LEDs
Green (100Mbps link / 10Mbps link)
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, or the
connected device is switched off, or there is a problem with the
connection (refer to Chapter 6 “Troubleshooting”). The port will
automatically adjust to the correct speed and duplex.
Rear Panel
The rear panel (Figure 4) of the Router contains four LAN ports, one ADSL
port, a reset button, and a power adapter socket.
Figure 4 Router - Rear Panel
6
7
8
9
10
12 VDC
1A MAX
RESET
LAN
4
3
2
1
ADSL
6 Wireless Antennae
The antennae on the product should be placed in a ‘V’ position when
initially installed.
CAUTION: Do not force the antennae beyond their mechanical stops.
Rotating the antennae further may cause damage.
7 Ethernet Ports
Using suitable RJ45 cables, you can connect your Router to a computer,
or to any other piece of equipment that has an Ethernet connection (for
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16
CHAPTER 1: INTRODUCING THE ROUTER
feature, which means either straight-through or a crossover cable can be
used.
8 Reset Button
If you want to reset your Router to factory default settings, and cannot
access the web management interface (for example, due to a lost
password), then you may use this button. Refer to “Forgotten Password
and Reset to Factory Defaults” on page 72 for further details.
9 Power Adapter Socket
Only use the power adapter that is supplied with this Router. Do not use
any other adapter.
10 ADSL Port
Using the RJ11 cable provided, you should connect your Router to the
telephone socket via a splitter.
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HARDWARE INSTALLATION
2
Introduction
This chapter will guide you through a basic installation of the Router,
including:
■
■
■
Connecting the Router to the Internet.
Connecting the Router to your network.
Setting up your computers for networking with the Router.
Safety Information
WARNING: Please read the “Safety Information” section in Appendix C
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.
■
is centrally located to the wireless computers that will connect to the
Router. A suitable location might be on top of a high shelf or similar
furniture to optimize wireless connections to computers in both
horizontal and vertical directions, allowing wider coverage.
■
■
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.
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18
CHAPTER 2: HARDWARE INSTALLATION
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.
■
■
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.
Powering Up the
Router
To power up the Router:
back panel of the Router.
2 Plug the power adapter into a standard electrical wall socket.
Connecting the
Router
The first step for installing your Router is to physically connect it to the
telephone socket and then connect it to a computer in order to be able to
access the Internet. See Figure 5:
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Connecting the Router
19
Figure 5 Connecting the Gateway
Power
Supply Unit
ADSL 11g Wireless Router
Wireless
Users
Your PC
3 Run the provided telephone cable from the wall jack providing ADSL
service to the ADSL port on your ADSL Router. When inserting an ADSL
RJ-11 plug, be sure the tab on the plug clicks into position to ensure that
it is properly seated. If you are using splitterless ADSL service, add
filters pass voice signals through but filter data signals out.)
Either:
If you are using a full-rate (G.dmt) connection, your service provider will
attach the outside ADSL line to a data/voice splitter. In this case you can
connect your phones and computer directly to the splitter as shown
below (Figure 6):
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20
CHAPTER 2: HARDWARE INSTALLATION
Figure 6 Installing with a splitter
or
If you are using a splitterless (G.lite) connection, then your service
provider will attach the outside ADSL line directly to your phone system.In
this case you can connect your phones and computer directly to the
incoming ADSL line, but you will have to add low-pass filters to your
phones as shown below (Figure 7):
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Connecting the Router
21
Figure 7 Installing without a splitter
You have now completed the hardware installation of your Router. Next
you need to set up your computers so that they can make use of the
Router to communicate with the Internet.
3Com recommends that you perform the initial Router configuration
from a computer that is directly connected to one of the LAN ports.
If you configure the Router from a wireless computer, note that you may
lose contact with the Router if you change the wireless configuration.
To communicate wirelessly with your Router, your wireless NIC should be
set as follows:
■
■
■
Encryption — none
SSID — 3Com
Channel — 11
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22
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
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 8 should be displayed. Select Internet Protocol
TCP/IP and click on Properties.
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24
CHAPTER 3: SETTING UP YOUR COMPUTERS
Figure 8 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 9.
Click OK.
Figure 9 Internet Protocol (TCP/IP) Properties Screen
7 Restart your computer.
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Obtaining an IP Address Automatically
25
Windows XP
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
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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26
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 10 should be
displayed.
4 Select the Never Dial a Connection option.
Figure 10 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 4.7 or higher, Internet
Explorer 5.0 or higher, or Mozilla 1.2.1 or higher).
To use the Setup Wizard:
1 Ensure that you have at least one computer connected to the Gateway.
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(Figure 11). The Login screen displays.
Figure 11 Web Browser Location Field (Factory Default)
4 To log in as an administrator, enter the password (the default password is
admin) in the Password field and click Log in (Figure 12).
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28
CHAPTER 4: RUNNING THE SETUP WIZARD
Figure 12 Router Login Screen
5 When you have logged in either:
■
The Status screen will appear (Figure 13). Select Wizard from the
menu.
or
■
If your Router has not been configured before, the Wizard will launch
automatically (refer to Figure 14).
6 You will be guided step by step through a basic setup procedure.
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30
CHAPTER 4: RUNNING THE SETUP WIZARD
The DSL Mode window allows you to set up the Router for the type of
Select a DSL mode from the following:
■
■
■
■
PPPoE see page 30
PPPoA see page 31
RFC1483 Bridged see page 32
RFC1483 Routed see page 31
and click Next.
For further information on selecting a mode see “Internet Settings” on
page 44.
PPPoE Mode
Figure 15 PPPoE Screen
To setup the router for use with a PPP over Ethernet (PPPoE) connection,
use the following procedure:
1 Enter your PPP over Ethernet user name in the Username text box.
2 Enter your PPP over Ethernet password in the Password text box.
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Accessing the Wizard
31
3 Re-type your PPP over Ethernet password in the Retype Password text
box.
4 Enter your VPI and VCI information in the VPI/VCI text boxes.
5 Check all of your settings, and then click Next.
PPPoA Mode
Figure 16 PPPoA Screen
To setup the router for use with a PPP over ATM (PPPoA) connection, use
the following procedure:
1 Enter your PPP over ATM user name in the Username text box.
2 Enter your PPP over ATM password in the Password text box.
3 Re-type your PPP over ATM password in the Retype Password text box.
4 Enter your VPI and VCI information in the VPI/VCI text boxes.
Check all of your settings, and then click Next.
RFC1483 Routed Mode
To setup the Router for use with an RFC1483 routed connection:
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32
CHAPTER 4: RUNNING THE SETUP WIZARD
Figure 17 RFC1483 Routed Configuration Screen
1 Enter your Internet IP address in the WAN IP text box.
2 Enter the subnet mask in the Subnet Mask text box.
3 Enter your VPI and VCI information in the VPI/VCI text boxes.
4 Enter the default gateway in the Default Gateway text box.
Check all of your settings, and then click Next.
RFC1483 Bridged Mode
To setup the Router for use with an RFC1483 bridged connection:
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34
CHAPTER 4: RUNNING THE SETUP WIZARD
When you complete the Setup Wizard, a configuration summary will
display. Verify the configuration information of the Router and then click
Apply to save your settings. 3Com recommends that you print this page
for your records.
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
location bar of your browser. The 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 20 on
page 36. When you click on a topic from the main menu, that page will
appear in the main part of the screen.
Status Screen
The Status screen allows you to view a summary of the Router
configuration, including the current Router status.
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36
CHAPTER 5: ROUTER CONFIGURATION
Status Figure 20 Status Screen
There are two buttons on this screen - Connect and Disconnect. These
buttons allow you to manually connect or disconnect your router from
your ISP’s service.
LAN Setup
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 any application. 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 =
192.168.1.1
■
■
■
Change the Subnet Mask. The default = 255.255.255.0
Enable/Disable the DHCP Server Function. Default = ON (Enabled)
Specify the Starting and Ending IP Pool Address. Default = Starting: 2 /
Ending: 254
■
■
■
Specify the IP address Lease Time. Default = Half day
Specify a local Domain Name. Default = NONE
To make changes, click "LAN Settings" on the LAN tab to the left.
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LAN Setup
37
The Router will also provide you with a list of all client computers
connected to the network. To view the list, click DHCP clients list.
LAN Settings Figure 21 LAN Settings Screen
The LAN Settings screen is used to specify the LAN IP address of your
Router, and to configure the DHCP server.
1 Select LAN Settings and then specify the Router IP Address and Subnet
Mask in the appropriate fields. The default IP address of the Gateway is
192.168.1.1.
2 If you want to use the Gateway as a DHCP Server, click in the On check
radio button.
3 If you need to, you can change the range of addresses given out by the
Router by changing the IP Pool Starting Address and IP Pool Ending
Address fields.
4 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
5 Specify the Local Domain Name for your network.
This step is optional.
6 Check all of your settings, and then click Apply.
The DHCP server will give out addresses to both wired and wireless
clients.
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38
CHAPTER 5: ROUTER CONFIGURATION
DHCP Clients List Figure 22 DHCP Clients List Screen
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.
As you connect more devices, the client list will grow to a maximum
number of 253 clients.
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Wireless
39
Wireless
From these pages you can configure the settings for wireless connections.
Figure 23 Wireless Settings Screen
This screen allows you to enable or disable the wireless section of your
LAN. When disabled, no wireless PCs can gain access to either the
Internet or other PCs on your Wired or Wireless LAN through this Router.
Select the required setting, and press Apply.
Configuring Wireless Figure 24 Wireless Configuration Screen
1 Set the Wireless Channel you want to use from the Channel drop-down
list.
2 Specify the SSID to be used by your Wireless Network in the SSID field. If
there are other wireless networks in your area, you should give your
wireless network a unique name.
3 A feature of wireless networking is the ability for a wireless network
adapter in a computer to look for an existing wireless network
automatically. This is done by setting the card's SSID setting to "ANY".
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40
CHAPTER 5: ROUTER CONFIGURATION
Your Router is capable of blocking this "random" searching for a
network. If you disable the "Broadcast SSID" feature, the only way a
computer can join the network is by setting the computer's SSID to the
specific name of the network (like WLAN). Be sure that you know your
SSID (network name) before enabling this feature. It is possible to make
your wireless network nearly invisible. By turning off the broadcast of the
SSID, your network will not appear in a site survey. Site Survey is a feature
of many wireless network adapters on the market today. It will scan the
"air" for any available network and allow the computer to select the
network from the site survey. Turning off the broadcast of the SSID will
help increase security.
4 Select the Wireless Mode that you wish to use on your Router from the
Wireless Mode drop down list. Unless you are having problems with your
Wireless Network, it is recommended that you leave this setting on it’s
default value of Mixed (11b+11g).
5 Select whether you wish to use g Nitro Mode on your Router by selecting
the appropriate g Nitro radio button. Unless you are having problems
with your Wireless Network, it is recommended that you leave this setting
on it’s default value of Enable.
6 Press Apply.
Encryption Figure 25 Encryption Screen
From this screen, you can select the wireless security mode that you wish
to use. There are five possible selections:
■
■
■
Disabled (see page 41)
WPA-PSK (no Server) (see page 41)
128-bit WEP (see page 42)
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Wireless
41
■
■
64-bit WEP (see page 42)
WPA (with RADIUS Server) (see page 43)
Select the required value from the drop down list, and press Apply.
Disabled In this mode, wireless transmissions will not be encrypted, and will be
visible to everyone. However, when setting up or debugging wireless
networks it is often useful to use this security mode.
WPA-PSK (no server) Figure 26 WPA-PSK (no server) Screen
WPA (Wireless Protected Access) provides dynamic key changes and
constitutes the best security solution. In a wireless network where not all
devices support WPA, WEP (Wired Equivalent Privacy) should be used.
1 Enter the pre-shared key in the Pre-shared Key (PSK) field. The pre-shared
key is a password, in the form of a word, phrase or series of letters and
numbers. The key must be between 8 and 63 characters long and can
include spaces and symbols.
Note that each client that connects to the network must use the same
key.
2 Click Apply.
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CHAPTER 5: ROUTER CONFIGURATION
128-bit WEP Figure 27 128-bit WEP Screen
WEP is the basic mechanism to transmit your data securely over the
wireless network. Matching encryption keys must be setup on your
Router and wireless client devices to use WEP.
1 You can either enter your WEP key as 13 pairs of hex digits (0-9, A-F), or
enter a memorable passphrase in the Passphrase box, and then click
Generate to generate the hex keys from the passphrase.
The WEP keys on each device in the wireless network must be identical.
In 128-bit WEP mode, only one WEP key (key 1) can be specified.
2 Click Apply.
64-bit WEP Figure 28 64-bit WEP Screen
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Wireless
43
WEP is the basic mechanism to transmit your data securely over the
wireless network. Matching encryption keys must be setup on your
Router and wireless client devices to use WEP.
1 You can either enter your WEP key as 5 pairs of hex digits (0-9, A-F), or
enter a memorable passphrase in the Passphrase box, and then click
Generate to generate the hex keys from the passphrase.
For 64-bit WEP, you can enter up to four keys, in the fields Key 1 to Key 4.
The radio button on the left hand side selects the key that is used in
transmitting data.
Note that all four WEP keys on each device in the wireless network must
be identical.
2 Click Apply.
WPA (with RADIUS Figure 29 WPA (with RADIUS Server) Screen
Server)
WPA (Wireless Protected Access) provides dynamic key changes and
constitutes the best security solution. In a wireless network where not all
devices support WPA, WEP (Wired Equivalent Privacy) should be used.
Wireless Protected Access using a server to distribute keys to the clients:
This option requires that a Radius server is running on the network.
1 Enter the IP address of the RADIUS server on your network into the
RADIUS Server field.
2 Enter the port that the RADIUS server is operating on in the RADIUS Port
field.
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CHAPTER 5: ROUTER CONFIGURATION
3 Enter the key for the RADIUS server in the RADIUS Key field.
4 By default, the WPA keys are changed every hour, but if you wish to
change this you can do so by specifying the required time in the Re-key
Interval field, in minutes
5 Click Apply.
Internet Settings
From these pages you can configure the settings for your DSL connection.
Connection Type Figure 30 Connection Type Screen
The Connection Type screen is used to configured the parameters for
screens should be obtained from your ISP.
■
■
■
■
page 45)
PPPoA - PPP over ATM, providing routing for multiple PCs (see
page 46)
Bridge Mode (for a single PC) - RFC1483 Bridged Mode, for single PCs
only (see page 47)
Routing Mode over ATM - RFC1483 Routed Mode, for multiple PCs
(see page 47)
Click Next.
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Internet Settings
45
PPPoE Figure 31 PPPoE Settings Screen
1 Enter the User Name assigned to you by your ISP in the User Name field.
2 Enter the Password assigned to you by your ISP in the Password field.
Re-enter your password in the Retype Password field.
3 If your ISP assigns your IP address dynamically, then select Yes in the IP
assigned by ISP field and proceed to step 4. If your ISP has assigned you a
fixed or static IP address, select No in the IP assigned by ISP field.
Then enter the IP address and Subnet Mask information provided by your
ISP into the IP address and Subnet Mask fields.
and VCI fields.
5 Select the encapsulation type (LLC or VC MUX) in the Encapsulation Type
field. This information will have been provided to you by your ISP.
6 If you want your Router to connect to the Internet every time a PC needs
to access it, check the Dial on Demand checkbox. If this box is not
checked, then you will have to manually connect and disconnect using
the buttons on the Status Screen (see page 35).
7 If you want your Router to automatically disconnect from the Internet
automatically after a period of inactivity, specify a time in the Idle Time
(Minutes) field.
Enter a value of 0 to disable this timeout.
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CHAPTER 5: ROUTER CONFIGURATION
8 Click Apply.
PPPoA Figure 32 PPPoA Settings Screen
1 Enter the User Name assigned to you by your ISP in the User Name field.
2 Enter the Password assigned to you by your ISP in the Password field.
Re-enter your password in the Retype Password field.
3 If your ISP assigns your IP address dynamically then select Yes in the IP
assigned by ISP field and proceed to step 4. If your ISP has assigned you a
fixed or static IP address, select No in the IP assigned by ISP field.
Then enter the IP address and Subnet Mask information provided by your
ISP into the IP address and Subnet Mask fields.
and VCI fields.
5 Select the encapsulation type (LLC or VC MUX) in the Encapsulation Type
field. This information will have been provided to you by your ISP.
6 If you want your Router to connect to the Internet every time a PC needs
to access it, check the Dial on Demand checkbox. If this box is not
checked, then you will have to manually connect and disconnect using
the buttons on the Home Screen (see page 35).
7 If you want your Router to automatically disconnect from the Internet
automatically after a period of inactivity, specify a time in the Idle Time
(Minutes) field.
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Internet Settings
47
Enter a value of 0 to disable this timeout.
8 Click Apply.
Bridged Mode for Figure 33 Bridge Mode for Single PC Screen
Single PC
1 Enter the VPI and VCI parameters provided to you by your ISP in the VPI
and VCI fields.
2 Select the encapsulation type (LLC or VC MUX) in the Encapsulation Type
field. This information will have been provided to you by your ISP.
3 Click Apply.
Routing Mode over Figure 34 Routing Mode over ATM Screen
ATM
1 Enter the IP address, Subnet Mask and Default Gateway information
provided by your ISP into the IP address, Subnet Mask and Default Route
fields.
2 Enter the VPI and VCI parameters provided to you by your ISP in the VPI
and VCI fields.
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CHAPTER 5: ROUTER CONFIGURATION
3 Select the encapsulation type (LLC or VC MUX) in the Encapsulation field.
This information will have been provided to you by your ISP.
4 Click Apply.
DNS Figure 35 DNS Screen
If your ISP provided you with specific DNS addresses to us, enter them
into the appropriate fields on this screen and click Apply.
Many ISP's do not require you to enter this information into the Router. If
you are using a Static IP connection type, then you may need to enter a
specific DNS address and secondary DNS address for your connection to
work properly. If your connection type is Dynamic, PPPoA or PPPoE, it is
likely that you do not have to enter a DNS address.
Routing
From these pages you can configure routing parameters. Your Router
supports the following routing functionality:
■
Static Routing
■
RIP (Routing Information Protocol) — RIP allows the network
administrator to set up routing information on one RIP-enabled device
and send that information to all RIP-enabled devices on the network.
■
Routing table display.
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Routing
49
Static Routes Figure 36 Static Route Parameters Screen
The Static Route Parameter screen shows a list of current static route
entries. For each entry, the following information is displayed:
■
■
■
Index — the index of the entry
Network Address — the network address of the route.
Subnet Mask — the subnet mask of the route.
A network address of 0.0.0.0 and a subnet mask of 0.0.0.0 indicates the
default route.
■
Gateway — the gateway used to route data to the network specified
by the network address.
To add a static route entry to the table, type in the network address,
subnet mask and gateway, and click Add. To change an entry, click Edit
and to delete an entry, click Delete. After you have finished making
changes to the table, click Apply.
RIP Parameters Figure 37 RIP Parameter Screen
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CHAPTER 5: ROUTER CONFIGURATION
You can set up RIP independently on both LAN and WAN interfaces.
1 Select the RIP Mode Enable radio button.
2 Select the appropriate radio button to enable or disable Auto Summary.
Auto Summarization sends simplified routing data to other RIP-enabled
devices rather than full routing data.
3 Select the Operation Mode:
■
Disabled — RIP is not enabled for the WAN or LAN interface.
■
Enabled — RIP is enabled for the WAN or LAN interface. The router
will transmit RIP update information to other RIP-enabled devices.
■
Silent — RIP is enabled, however the router only receives RIP update
messages, it will not transmit any messages itself.
4 In the Version field, select RIPv1 or RIPv2.
We recommend that you only use RIPv1 if there is an existing RIP-enabled
device on your network that does not support RIPv2. In all other cases,
you should use RIPv2.
5 Use the Poison Reverse radio button to enable or disable Poison reverse
on the router. Enabling Poison Reverse on your Router allows it to
indicate to other RIP-enabled devices that they have both routes that
point to each other, preventing data loops.
6 Use the Authentication Required field to choose one of three modes of
authentication:
■
None — Switches off authentication on the specified interface.
■
Password — An unencrypted text password that needs to be set on all
RIP-enabled devices connected to this router. RIP information is not
shared between devices whose passwords do not match.
■
MD5 — A password that has been encrypted using the MD5
encryption algorithm that needs to be set on all RIP-enabled devices
connected to this router. RIP information is not shared between
devices whose passwords do not match.
7 In the Authentication Code field, enter the password that is required if
either the Password or MD5 option has been selected.
8 Click Apply.
Routing Table The Routing Table screen displays details for the default routing used by
your Router and any routing created using Static Routing or RIP.
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Firewall
51
Figure 38 Routing Table Screen
Firewall
From these pages you can configure settings for the firewall.
Figure 39 Firewall Screen
Your Router is equipped with a firewall that will protect your network
from a wide array of common hacker attacks including Ping of Death
(PoD) and Denial of Service (DoS) attacks. You can turn the firewall
function off if needed. Turning off the firewall protection will not leave
your network completely vulnerable to hacker attacks, but it is
recommended that you turn the firewall on whenever possible.
1 Enable or Disable the Firewall as required by selecting the appropriate
radio button.
2 Press Apply.
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CHAPTER 5: ROUTER CONFIGURATION
Special Applications Figure 40 Special Applications Screen
Special Applications let you specify specific ports to be open for specific
applications to work properly with the Network Address Translation (NAT)
feature of the Router.
A list of popular applications has been included to choose from. Select
your application from the drop-down list at the top of the screen. Select
the row that you want to copy the settings to from the drop-down list,
select the row you want to copy to, and then click Copy To. The settings
will be transferred to the row you specified. Click Apply to save the
setting for that application.
If your application is not here, you will need to check with the application
vendor to determine which ports need to be configured. You can
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.
2 Specify the Public Ports used by the application, 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.
3 You can temporarily enable or disable each entry in the table by checking
or unchecking the Enabled checkbox.
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Firewall
53
4 Click Apply.
Virtual Servers Figure 41 Virtual Servers Screen
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 settings:
1 Enter the IP address in the space provided for the internal machine.
2 Enter the port type (TCP, UDP, or both TCP and UDP).
3 Specify the Public port that will be seen by clients on the Internet, and the
LAN port which the traffic will be routed to.
4 You can enable or disable each Virtual Server entry by checking or
unchecking the appropriate Enable checkbox.
5 Click Apply to save the changes for each Virtual Server entry.
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CHAPTER 5: ROUTER CONFIGURATION
Client IP Filters The Router can be configured 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 computers, or multiple computers.
Access Control Figure 42 Access Control Screen
Access Control allows users to define the traffic type permitted or
not-permitted to the Internet.
This screen allows you to enable or disable all Access Control rules. Select
the appropriate Enable Filtering Function radio button, and click Apply to
save the settings.
To edit or delete specific Access Control rules, click on Edit or Delete for
the appropriate access control rule.
To control access to specific Internet services:
1 Click on Add PC.
A screen similar to that shown below will appear
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Firewall
55
Figure 43 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
Service.
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.
Note that Schedule Rules are defined on the Schedule Rule page (see
page 57).
6 Click OK to add the settings.
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CHAPTER 5: ROUTER CONFIGURATION
URL Blocking Figure 44 URL Blocking Screen
want to filter on your network.
For example, entering a keyword of “xxx” would block access to any URL
that contains the string “xxx”.
To complete this configuration, you will need to create or modify an
access rule in the "Access Control" section (see “Access Control” on
page 54).
From the "Access Control Add PC" section check the option for "WWW
with URL Blocking" in the Client PC Service table to filter out the websites
and keywords specified in the table.
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Firewall
57
Schedule Rule Figure 45 Schedule Rule Screen
The Router can be configured to restrict access to the Internet, e-mail or
other network services at specific days and times. These schedule rules
are used by the rules defined on the Access Control page (see “Access
Control” on page 54).
To add a schedule rule:
1 Click Add Rule
A screen similar to that shown below will appear.
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CHAPTER 5: ROUTER CONFIGURATION
Figure 46 Add Schedule Rule Screen
2 Enter a name and comment for the schedule rule in the Name and
Comment fields.
3 Specify the schedule rules for the required days and times - note that all
times should be in 24 hour format.
4 Click Apply.
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Firewall
59
MAC Address Figure 47 MAC Address Filtering Screen
Filtering
The MAC Address Filter is a powerful security feature that allows you to
specify which computers are allowed on the Wireless network. Any
wireless computers attempting to access the network that are not
specified in the filter list will be denied access.
To Enable or Disable this feature, select the appropriate Enable MAC
Address Filtering radio button, and click Apply.
When you enable this feature, you must enter the MAC address of each
client on your network to allow network access.
Alternatively, you can copy the MAC address by selecting the name of the
computer from the DHCP Clients List, and then location in the MAC
Address Filter table, and then click Copy To.
Click Apply to save the settings.
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CHAPTER 5: ROUTER CONFIGURATION
DMZ Figure 48 DMZ Screen
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.
Use this feature on a temporary basis. The computer in the DMZ is not
protected from hacker attacks.
To put a computer in the DMZ, enter the last digits of its LAN IP address in
the Static IP field. Put the IP address (if known) that will be accessing the
DMZ PC into the Public IP field, so that only the computer on the Internet
at this address can access this PC without firewall protection. If the IP
address is not known, or if more than one PC on the Internet will need to
access this PC, then set the Public IP to 0.0.0.0.
Click Apply.
Advanced From the Advanced screen, you can configure:
■
■
■
NAT (Network Address Translation)
Universal Plug and Play
WAN Ping Blocking
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Firewall
61
■
Remote Admin
Figure 49 Advanced Screen
NAT Enable
Before you enable 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
used by advanced users, and 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.
Universal Plug and Play
Universal Plug and Play is a technology that offers seamless operation of
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
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CHAPTER 5: ROUTER CONFIGURATION
Router ships with the Universal Plug and Play feature disabled. If you are
using any applications that are Universal Plug and Play compliant, and
wish to take advantage of the Universal Plug and Play features, you can
enable this feature. Simply select Enable in the UPnP Enabling section of
the Utilities page. Click Apply to save the change.
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
response from the IP address, a hacker can determine that something of
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, select Block ICMP Ping and click Apply; the
router will not respond to an ICMP ping from the Internet.
Remote Administration
Before you enable this function, ensure that you have set the
Administration Password.
Remote Administration allows you to make changes to your Router’s
settings from anywhere on the Internet. You can choose to either:
■
Click the check box to enable any PC on the network to remotely
manage your Router
■
Enter one specific IP address that can remotely manage your router.
This is more secure, as only the specified IP address will be able to
manage the Router
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SNMP
63
SNMP
SNMP (Simple Network Management Protocol) allows remote
management of your router by a PC that has an SNMP management
agent installed.
SNMP Community Figure 50 SNMP Community Screen
To Configure SNMP:
1 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.
2 In the Access column, select Read to allow the management agent to
collect data (for example, bandwidth usage) from your router. Select
Write to allow the management agent to change the configuration of
your router.
3 Check the appropriate Valid checkbox to enable the communication
channel.
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CHAPTER 5: ROUTER CONFIGURATION
SNMP Trap Figure 51 SNMP Trap Screen
You can configure your router to send status messages to the SNMP
management agent if a problem occurs on the network. To configure
traps:
1 In the IP Address field, enter the IP address of the PC to which you want
your router to send status messages.
2 In the Community field, enter the name of the SNMP communication
channel to which you want your router to send status messages.
3 Set the Version field to match the version of trap messaging that your
SNMP management agent supports. The router supports V1 and V2c trap
messaging.
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System Tools
65
System Tools
These pages lets you manage different parameters of the router and
perform certain administrative functions.
Restart Router Figure 52 Restart Router Screen
Sometimes it may be necessary to Restart or Reboot the Router.
Restarting or Rebooting the Router will not delete any of your
configuration settings.
Click Restart to Restart or Reboot the Router.
Reset to Factory Figure 53 Reset to Factory Default Screen
Default
Using this option will reset all of the settings in the Router to the factory
(default) settings. It is recommended that you backup your settings
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CHAPTER 5: ROUTER CONFIGURATION
before you restore all of the defaults. To restore the factory default
settings, click Reset.
Backup/Restore Figure 54 Backup/Restore Settings Screen
Settings
You can save your current configuration by using this feature. Saving your
configuration will allow you to restore it later if your settings are lost or
changed. It is recommended that you backup your current configuration
before performing a firmware update.
This option will allow you to restore a previously saved configuration.
Please select the configuration file and click Restore.
Upgrade Figure 55 Upgrade Screen
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System Tools
67
From time to time 3Com may release new versions of the Routers
firmware. Firmware updates contain improvements and fixes to problems
that may have existed.
Please download the firmware file to your PC first, and then click Browse
and select the firmware file. Click Upgrade to upload the firmware to the
Router.
Admin Password Figure 56 Admin Password Screen
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 into the router in the
future. It is also recommended that you set a password if you plan to use
the Remote management feature of this Router.
To change the password:
1 Enter the current password into the Type in current password field.
2 Enter the new password into the Type in new Password and Confirm new
Password fields.
3 Click Apply.
The login timeout option allows you to set the period of time that you
can be logged into the Router's setup interface. The timer starts when
there is no activity. For example, you have made some changes in the
setup interface, then left your computer alone without clicking "Logout".
Assuming the timeout is set to 5 minutes, then 5 minutes after you leave,
the login session will expire. You will have to login to the router again to
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CHAPTER 5: ROUTER CONFIGURATION
make any more changes. The login timeout option is for security
purposes and the default is set to 5 minutes. As a note, only one
computer can be logged into the Router's web management interface at
one time.
Time and Time Zone Figure 57 Time and 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 synchronized clock in the Router is used to record the
security log and control client filtering. Select the time zone that you
reside in. If you reside in an area that observes Daylight Saving, then place
a checkmark in the box next to "Enable Daylight Saving". The system
clock may not update immediately. Allow at least 15 minutes for the
router to contact the time servers on the Internet and get a response. You
cannot set the clock yourself.
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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Status and Logs
69
Status and Logs
You can use the Status pages to view version numbers for your router’s
software and hardware and check the status of connections to WAN,
LAN and WLAN interfaces.
ADSL Status Figure 58 ADSL Status Screen
This screen shows modem status and statistics
Logs Figure 59 Logs Screen
This screen shows any attempts that have been made to gain access to
your network as well as the system activities.
Click Refresh to update the display.
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CHAPTER 5: ROUTER CONFIGURATION
Click Clear to clear the log (note that all current entries will be erased).
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.
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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 and DSL LEDs 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 link 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 Gateway 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 (e.g.
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
Connections tab and click on the LAN Settings button at the bottom.
Make sure that the Proxy Server option is unchecked.
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CHAPTER 6: TROUBLESHOOTING
■
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 is
192.168.1.1 (the address of the Gateway). 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
telephone line is OK, and that the DSL LED on the Router is
illuminated.
■
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.
■
■
Check that the PPPoE or PPPoA user name and password are correct.
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.
ForgottenPassword If you can browse to the Router configuration screen but cannot log on
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 this would be convenient.
1 Remove power from the Router.
2 Disconnect all your computers and the telephone line from the Router.
3 Re-apply power to the Router, and wait for it to finish booting up.
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Wireless Networking
73
4 Press and hold the Reset button on the rear panel (see “Rear Panel” on
page 15) for 5 seconds.
5 The Router will restart, and when the start-up sequence has completed,
browse to:
http://192.168.1.1
and run the configuration wizard. You may need to restart your computer
before you attempt this.
6 When the configuration wizard has completed, you may reconnect your
network as it was before.
Wireless
Networking
■
Ensure that you have an 802.11b or 802.11g wireless adapter for
each wireless computer, and that it is correctly installed and
configured. Verify that each Wireless computer has either Windows
95 or higher or MAC OS 8.5 or higher.
■
Verify that your wireless computers are configured to work in
Access Point that is designed to operate in Infrastructure mode. Ad
Hoc mode is not supported by the Router.
■
■
If you have a wired and a wireless NIC in the same computer, ensure
that the wired NIC is disabled.
Check the status of the Router Wireless LED, it should be lit if wireless
is enabled and will flash when there is wireless activity. If not lit go to
“Wireless” on page 39 and enable wireless networking.
■
■
Ensure that the TCP/IP settings for all devices are correct.
Ensure that the Wireless Clients are using the same SSID or Service
Area Name as the Router. The SSID is case-sensitive
■
■
■
Ensure that the encryption method and level that you use on your
clients are the same as those configured on the Router. The Router
cannot simultaneously support WPA and WEP encryption.
Ensure that you have the Wireless computer enabled in the list of
allowed MAC addresses if you are using MAC Address Filtering on the
Router.
If you are having difficulty connecting or are operating at a low speed
try changing the antenna positions on the rear of the Router. For more
effective coverage you can try reorientating your antennae. Place one
antenna vertically and one horizontally to improve coverage.
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74
CHAPTER 6: TROUBLESHOOTING
Additionally consider moving the wireless computer closer to the
Router to confirm that the building structure or fittings are not
adversely affecting the connectivity. If this resolves the problem
consider relocating the Wireless computer or the Router, or trying a
different channel on the Router.
■
Sources of interference: The 2.4Ghz ISM band is used for 802.11b and
802.11g. This is generally a licence free band for low power
applications, and you may have other devices at your location that
operate in this frequency band. You should take care to ensure that
there are no devices like microwave ovens for example close to the
Router or wireless computers as this could affect receiver sensitivity
and reduce the performance of your network. If you are unsure try
relocating both the wireless computers and the Router to establish
whether this problem exists.
■
Most wireless computer Adapters will scan the channels for the
wireless Router. If a wireless computer has not located the Router then
try initiating a search manually if the client software supports this
feature or manually set the channel on your wireless computer to
correspond to the Router channel number. Please refer to your
Wireless computer adapter documentation and vendor to do this.
■
Speed of connection: The 802.11b and 802.11g standards will
automatically choose the best speed depending on the quality of your
connection. As the signal quality weakens then the speed falls back to
a lower speed. The speeds supported by 802.11g are 54 Mbps,
48 Mbps, 36 Mbps, 24 Mbps, 18 Mbps, 12 Mbps, and 6 Mbps. The
speeds supported by 802.11b are 11 Mbps, 5.5 Mbps, 2 Mbps and
1 Mbps. In general the closer you are to the Router the better the
speed. If you are not achieving the speed you had anticipated then try
moving the antenna on the Router or moving the Wireless computer
closer to the Router. In an ideal network the Router should be located
in the centre of the network with Wireless computers distributed
around it. Applications are generally available with the computer
wireless card to carry out a site survey. Use this application to find the
optimal siting for your wireless computer. Consult your Computer
Card documentation and vendor for more details.
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.
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Frequently Asked Questions
75
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 the telephone line and all
your computers, except for the one computer with the software image.
2 You will need to reconfigure this computer to obtain an IP address
automatically (see “Obtaining an IP Address Automatically” on page 23)
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.
7 Refer to the Installation Guide to reconnect your Router to the telephone
line and 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?
See “Forgotten Password and Reset to Factory Defaults” on
page 72.
How many computers on the LAN does the Router support?
A maximum of 253 computers on the LAN are supported.
How many wireless clients does the Router support?
A maximum of 128 wireless clients are supported.
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76
CHAPTER 6: TROUBLESHOOTING
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 supports VPN passthrough, which allows VPN clients on
the LAN to communicate with VPN hosts on the Internet. It is also
possible to set up VPN hosts on your LAN that clients elsewhere on
the Internet can connect to, but this is not a recommended
configuration.
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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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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78
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 3 for an example about how a network with three computers
and a Router might be configured.
Table 3 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?
79
This type of IP Address operates on a subnet mask of ‘255.255.0.0’.
See Table 4 for an example about how a network (only four computers
represented) and a Router might be configured.
Table 4 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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80
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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TECHNICAL SPECIFICATIONS
B
This section lists the technical specifications for the OfficeConnect ADSL
Wireless 11g Firewall Router.
OfficeConnectADSL Interfaces
Wireless 11g
DSL connection
Firewall Router
LAN connection — four 10Mbps/100Mbps dual speed Ethernet ports
(10BASE-T/100BASE-TX)
WLAN Interfaces
Standard IEEE 802.11g, Direct Sequence Spread Spectrum (DSSS)
Transmission rate: 54Mbps, automatic fallback to 48, 36, 24, 18, 12, or
6 Mbps
Maximum channels: 14
Range up to 304.8m (1000ft)
Frequency: (US/Canada/Europe) 2.400-2.4835 GHz
Sensitivity: 6, 12, 18, 24, 36, 48 Mbps: -85 dBm;
54 Mbps -66 dBm typical
Modulation: CCK, BPSK, QPSK, OFDM
Encryption: 40/64 bit WEP, 128 bit WEP, WPA
Maximum clients: 128
O/P Power: 18dBm
Standard IEEE 802.11b, Direct Sequence Spread Spectrum (DSSS)
Transmission rate: 11bps, automatic fallback to 5.5, 2, or 1 Mbps
Maximum channels: 14
Range up to 304.8m (1000ft)
Frequency: (US/Canada/Europe) 2.400-2.4835 GHz
Sensitivity: 1, 2, 5.5 Mbps: -85 dBm; 11 Mbps -82 dBm typical
Modulation: CCK, BPSK, QPSK
Encryption: 40/64 bit WEP, 128 bit WEP, WPA
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82
APPENDIX B: TECHNICAL SPECIFICATIONS
Maximum clients: 128
O/P Power 16dBm
Operating Temperature
0 °C to 40 °C (32 °F to 105 °F)
Power
8VA, 25 BThU/hr
Humidity
0 % to 90 % (non-condensing) humidity
Dimensions
■
■
■
Width = 220 mm (8.7 in.)
Depth = 133 mm (5.2 in.)
Height = 38 mm (1.5 in.)
Weight
Approximately 550 g (1.1 lbs)
Standards Functional:
ISO 8802/3
IEEE 802.3
IEEE 802.11b, 802.11g
Safety:
EMC:
EN 60950
EN 55022 Class B
EN 55024
FCC Part 15 Class B*
Radio
ETS 300 328 (2.4 GHz ISM band wide band transmission
systems.
Environmental: EN 60068 (IEC 68)
*See “FCC Statement” on page 105 for conditions of operation.
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OfficeConnect ADSL Wireless 11g Firewall Router
83
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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84
APPENDIX B: TECHNICAL SPECIFICATIONS
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SAFETY INFORMATION
C
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: The Router generates and uses radio frequency (rf) energy. In
some environments, the use of rf energy is not permitted. The user
should seek local advice on whether or not rf energy is permitted within
the area of intended use.
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.
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86
APPENDIX C: SAFETY INFORMATION
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.
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: Der Router erzeugt und verwendet Funkfrequenz (RF). In
manchen Umgebungen ist die Verwendung von Funkfrequenz nicht
gestattet. Erkundigen Sie sich bei den zuständigen Stellen, ob die
Verwendung von Funkfrequenz in dem Bereich, in dem der Bluetooth
Access Point eingesetzt werden soll, erlaubt ist.
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.
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87
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.
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: La Router fournit et utilise de l'énergie
radioélectrique (radio fréquence -rf). L'utilisation de l'énergie
radioélectrique est interdite dans certains environnements. L'utilisateur
devra se renseigner sur l'autorisation de cette énergie dans la zone
prévue.
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
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88
APPENDIX C: SAFETY INFORMATION
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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END USER SOFTWARE LICENSE
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APPENDIX D: END USER SOFTWARE LICENSE AGREEMENT
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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, 350 Campus Drive, Marlborough, MA. USA 01752-3064
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OBTAINING SUPPORT FOR YOUR
PRODUCT
D
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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92
APPENDIX D: 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
Support and Repair
To obtain telephone support as part of your warranty and other service
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
93
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 5977 7991
Philippines
1235 61 266 2602 or
1800 1 888 9469
10800 61 00137 or
021 6350 1590 or
00800 0638 3266
800 6161 463
P. R. of China
Indonesia
Japan
Singapore
S. Korea
Taiwan
080 333 3308
00801 611 261
Malaysia
1800 801 777
New Zealand
Pakistan
0800 446 398
+61 2 9937 5083
Thailand
001 800 611 2000
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
01407 3387
1800 945 3794
199 161346
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.
Italy
You can also obtain support in this region using the following URL:
http://emea.3com.com/support/email.html
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94
APPENDIX D: 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
Guatemala
Haiti
Honduras
Jamaica
Martinique
Mexico
Nicaragua
Panama
Paraguay
Peru
Puerto Rico
Salvador
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
0800 13 3COM
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
Trinidad and Tobago
Uruguay
Venezuela
Virgin Islands
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
Published 16th July 2003
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GLOSSARY
802.11b The IEEE specification for wireless Ethernet which allows speeds of up to
11 Mbps. The standard provides for 1, 2, 5.5 and 11 Mbps data rates.
The rates will switch automatically depending on range and environment.
802.11g The IEEE specification for wireless Ethernet which allows speeds of up to
54 Mbps. The standard provides for 6, 12, 24, 36, 48 and 54 Mbps data
rates. The rates will switch automatically depending on range and
environment.
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.
Ad Hoc mode Ad Hoc mode is a configuration supported by most wireless clients. It is
used to connect a peer to peer network together without the use of an
access point. It offers lower performance than infrastructure mode, which
is the mode the router uses. (see also Infrastructure mode.)
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
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96
GLOSSARY
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.
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.
Channel Similar to any radio device, the Wireless Cable/DSL router allows you to
choose different radio channels in the wireless spectrum. A channel is a
particular frequency within the 2.4GHz spectrum within which the Router
operates.
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.
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
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GLOSSARY
97
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.
ESSID Extended Service Set Identifier. The ESSID is a unique identifier for your
wireless network. You must have the same ESSID entered into the router
and each of it's wireless clients.
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.
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98
GLOSSARY
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
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.
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GLOSSARY
99
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.
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.
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.
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100
GLOSSARY
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.
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.
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.
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GLOSSARY
101
URL Filter A URL Filter is a feature of a firewall that allows it to stop its clients form
browsing inappropriate Web sites.
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.
WECA Wireless Ethernet Compatibility Alliance. An industry group formed to
certify cross vendor interoperability and compatibility of 802.11b and
802.11g wireless networking products and to promote the standard for
enterprise, small business and home environments. (see also 802.11b,
802.11g, Wi-Fi)
WEP Wired Equivalent Privacy. A shared key encryption mechanism for wireless
networking. Encryption strength is 40/64 bit or 128 bit.
Wi-Fi Wireless Fidelity. This is the certification granted by WECA to products
that meet their interoperability criteria. (see also 802.11b, WECA)
Wireless Client The term used to describe a desktop or mobile PC that is wirelessly
connected to your wireless network
Wireless LAN Service Another term for ESSID (Extended Service Set Identifier)
Area
Wizard A Windows application that automates a procedure such as installation
or configuration.
WLAN Wireless Local Area Network. A WLAN is a group of computers and
devices connected together by wireless in a relatively small area (such as a
house or office).
WPA Wi-Fi Protected Access. A dynamically changing encryption mechanism
for wireless networking. Encryption strength is 256 bit.
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102
GLOSSARY
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INDEX
P
A
Password 27
PPPoE 26, 30, 31
Addresses
IP 77
Automatic Addressing 79
R
C
Cable Specifications 83
Channels 105
S
Conventions
Setup Wizard 27
Specifications
notice icons, About This Guide
text, About This Guide
8
8
D
Static Addressing 79
Subnet Mask 77
Summary 33
DHCP 38, 79
DHCP Server 25
DNS 24
T
TCP/IP 23, 25, 77
Technical
F
specifications 81
standards 81
I
W
Internet
Web Proxy 26
Wireless
IP Address 37, 77
LED 15
networking 73
NIC 14
L
LED 14
N
Network
addresses 77
Networking
wireless 73
NIC
wireless 14
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104
INDEX
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REGULATORY NOTICES FOR THE
OFFICECONNECT ADSL WIRELESS
Channels
Use of the OfficeConnect ADSL Wireless 11g Firewall Router is only
authorized for the channels approved by each country. For proper
installation, login to the management interface and select your country
from the drop down list. Table 5 below details the channels permitted by
the local regulatory agencies:
Table 5 Channels
Channels
Country
1 - 13
Australia, Austria, Bahrain, Belarus, Belgium, Chile, China, Costa
Rica, Croatia, Cyprus, Czech Republic, Denmark, Finland, France*,
Germany, Greece, Hong Kong, Hungary, Iceland, India, Indonesia,
Ireland, Israel, Italy, Liechtenstein, Lithuania, Luxembourg, Malaysia,
Netherlands, New Zealand, Norway, Paraguay, Peru, Philippines,
Poland, Portugal, Russia, Saudi Arabia, Singapore, Slovenia, South
Africa, South Korea, Spain, Sweden, Switzerland, Thailand, Turkey,
United Kingdom, Uruguay, Venezuela.
1 - 11
10 - 13
1-14
Argentina, Brazil, Canada, Columbia, Mexico, Taiwan, United States
France*, Jordan
Japan
* The channels available for use in France depend on the region in which
you are located.
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.
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106
However, there is no guarantee that interference will not occur in a
particular installation.
Information to the
User
If this equipment does cause interference to radio or television reception,
which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the
following measures:
■
■
■
■
Reorient the receiving antenna.
Relocate the equipment with respect to the receiver.
Move the equipment away from the receiver.
Plug the equipment into a different outlet so that equipment and
receiver are on different branch circuits.
■
Consult the dealer or an experienced radio/television technician for
help.
The user may find the following booklet prepared by the Federal
Communications Commission helpful:
How to Identify and Resolve Radio-TV Interference Problems
This booklet is available from the U.S. Government Printing Office,
Washington, DC 20402, Stock No. 004-000-00345-4. In order to meet
FCC emissions limits, this equipment must be used only with cables which
comply with IEEE 802.3.
FCC Declaration of
Conformity
We declare under our sole responsibility that the
Model:
Description:
3CRWE754G72-A/B OfficeConnect ADSL Wireless 11g Firewall 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
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107
■
15.107 (e)Class B Conducted Limits
15.109 (g)Class B Radiated Emissions Limits
Exposure to Radio Frequency Radiation: The radiated output power of the
3Com ADSL 11g Wireless Router is far below the FCC radio frequency
exposure limits. Nevertheless, the 3Com OfficeConnect ADSL Wireless
11g Firewall Router shall be used in such manner that the potential for
human contact during normal operation is minimized. The distance
between the antennas and the user should not be less than 20 cm.
CE Statement
(Europe)
This product complies with the European Low Voltage Directive
73/23/EEC, EMC Directive 89/336/EEC as amended by European Directive
93/68/EEC and the Radio and Telecommunications Terminal Equipment
Directive 99/5/EC.
FCC
CAUTION: To assure continued compliance, any changes or
modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate this equipment.
RF Exposure
Compliance
Statement (U.S.)
CAUTION: The 3Com OfficeConnect ADSL Wireless 11g Firewall Router
has been certified as a mobile computing device as per FCC Section
2.1091. In order to comply with the FCC RF exposure requirements, the
3Com ADSL 11g Wireless Router must only be installed with approved
antennas and a minimum separation distance of 20 cm (8 in) must be
maintained from the antenna to any nearby persons.
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108
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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.
DUA0075-4AAA01
Rev. 01
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|