3Com 3CRWE554G72 Network Card User Manual

OfficeConnect®
Wireless 11g Cable/DSL Gateway
User Guide
3CRWE554G72
http://www.3com.com/
Part No. DUA0055-4AAA01
Rev. 01
Published July 2003
3Com Corporation
5500 Bayfront Plaza
Santa Clara, California
95052-8145
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please contact 3Com and a copy will be provided to you.
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If you are a United States government agency, then this documentation and the software described herein are
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All technical data and computer software are commercial in nature and developed solely at private expense.
Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995) or
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CONTENTS
ABOUT THIS GUIDE
Naming Convention 7
Conventions 8
Feedback about this User Guide
Related Documentation 9
Product Registration 9
1
8
INTRODUCING THE GATEWAY
OfficeConnect Wireless 11g Cable/DSL Gateway
Gateway Advantages 13
Package Contents 13
Minimum System and Component Requirements
Front Panel 14
Rear Panel 16
2
HARDWARE INSTALLATION
Introduction 19
Safety Information 19
Positioning the Gateway 19
Using the Rubber Feet 20
Wall Mounting 20
Before you Install your Gateway
Powering Up the Gateway 22
Connecting the Gateway 22
3
21
SETTING UP YOUR COMPUTERS
Obtaining an IP Address Automatically
Windows 2000 25
Windows XP 27
Windows 95/98/ME 27
25
11
14
Macintosh 27
Disabling PPPoE and PPTP Client Software
Disabling Web Proxy 28
4
28
RUNNING THE SETUP WIZARD
Accessing the Wizard 29
Password 32
Time Zone 32
WAN Settings 33
LAN Settings 38
DHCP 38
Wireless Settings 39
Summary 40
5
GATEWAY CONFIGURATION
Navigating Through the Gateway Configuration Pages
Main Menu 41
Option Tabs 42
Welcome Screen 42
Notice Board 42
Password 43
Wizard 44
LAN Settings 44
Unit Configuration 44
DHCP Clients List 45
Wireless Settings 47
Configuration 47
Encryption 49
Configuring WPA Encryption 49
Configuring WEP Encryption 50
Connection Control 53
Client List 55
Profile 55
Internet Settings 57
Connection to ISP 58
Firewall 63
Virtual Servers 63
41
Special Applications
PC Privileges 67
URL Filter 69
Security 73
System Tools 75
Restart 75
Time Zone 76
Configuration 77
Upgrade 78
Status and Logs 78
Status 79
Usage 79
Logs 80
Support/Feedback 80
Support 81
Feedback 81
6
65
TROUBLESHOOTING
Basic Connection Checks 83
Browsing to the Gateway Configuration Screens 83
Connecting to the Internet 84
Forgotten Password and Reset to Factory Defaults 85
Wireless Networking 85
Replacement Power Adapters 87
Alert LED 88
Recovering from Corrupted Software 89
Frequently Asked Questions 90
A
USING DISCOVERY
Running the Discovery Application 93
Windows Installation (95/98/2000/Me/NT)
B
IP ADDRESSING
The Internet Protocol Suite 95
Managing the Gateway over the Network
IP Addresses and Subnet Masks 95
95
93
How does a Device Obtain an IP Address and Subnet Mask?
DHCP Addressing 97
Static Addressing 97
Auto-IP Addressing 97
C
97
TECHNICAL SPECIFICATIONS
Standards
100
D
SAFETY INFORMATION
E
END USER SOFTWARE LICENSE AGREEMENT
F
ISP INFORMATION
GLOSSARY
INDEX
REGULATORY NOTICES FOR THE WIRELESS 11G CABLE/DSL
GATEWAY
ABOUT THIS GUIDE
This guide describes how to install and configure the OfficeConnect
Wireless 11g Cable/DSL Gateway (3CRWE554G72).
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 gateway systems.
If a release note is shipped with the OfficeConnect Wireless 11g
Cable/DSL Gateway 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 Wireless 11g Cable/DSL
Gateway is referred to as the “Gateway”.
Category 3 and Category 5 Twisted Pair Cables are referred to as Twisted
Pair Cables throughout this guide.
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
Information that alerts you to potential loss of data or
potential damage to an application, system, or device.
Warning
Information that alerts you to potential personal
injury.
Table 2 Text Conventions
Convention
The words “enter”
and “type”
Keyboard key names
Words in italics
Description
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.”
If you must press two or more keys simultaneously, the key
names are linked with a plus sign (+). Example:
Press Ctrl+Alt+Del
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
User Guide
Your suggestions are very important to us. They will help make our
documentation more useful to you. Please e-mail comments about this
document to 3Com at:
pddtechpubs_comments@3com.com
Please include the following information when commenting:
■
Document title
■
Document part number (on the title page)
■
Page number (if appropriate)
Conventions
9
Example:
■
OfficeConnect Wireless 11g Cable/DSL Gateway User Guide
■
Part Number DUA0055-4AAA01
■
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
Documentation
Product Registration
In addition to this guide, each Gateway document set includes one
Installation Guide. This guide contains the instructions you need to install
and configure your Gateway.
You can now register your Gateway on the 3Com web site and receive
up-to-date information on your product:
http://www.3com.com/register/
10
ABOUT THIS GUIDE
1
INTRODUCING THE GATEWAY
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. The OfficeConnect® product range from 3Com
has changed all this, bringing networks to the small office.
The products that compose the OfficeConnect range give you, the small
office user, the same power, flexibility, and protection that has been
available only to large corporations. Now, you can network the
computers in your office, connect them all to a single Internet outlet, and
harness the combined power of all of your computers.
OfficeConnect
Wireless 11g
Cable/DSL Gateway
The OfficeConnect Wireless 11g Cable/DSL Gateway is designed to
provide a cost-effective means of sharing a single broadband Internet
connection amongst several wired and wireless computers. The Gateway
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 Gateway can also prevent your users from accessing Web
sites which you find unsuitable.
Figure 1 shows an example network without a Gateway. 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.
12
CHAPTER 1: INTRODUCING THE GATEWAY
Figure 1 Example Network Without a Gateway
When you use the Gateway in your network (Figure 2), it becomes your
connection to the Internet. Connections can be made directly to the
Gateway, 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 Cable/DSL Gateway
Gateway Advantages
Gateway
Advantages
Package Contents
13
The advantages of the Gateway 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
■
Filtered access of inappropriate Web sites using the built-in URL filter
The Gateway kit includes the following items:
■
One OfficeConnect Wireless 11g Cable/DSL Gateway
■
One power adapter for use with the Gateway
■
Four rubber feet
■
One Ethernet cable
■
One CD-ROM containing the Gateway Discovery program and this
User Guide
■
Installation Guide
■
One Support and Safety Information Sheet
■
One Warranty Flyer
If any of these items are missing or damaged, please contact your retailer.
14
CHAPTER 1: INTRODUCING THE GATEWAY
Minimum System
and Component
Requirements
Front Panel
Your Gateway 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 Gateway.
■
An 802.11b or 802.11g wireless NIC.
■
A cable modem or DSL modem with an Ethernet port (RJ-45
connector).
■
An active Internet access account.
■
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.
The front panel of the Gateway contains a series of indicator lights (LEDs)
that help describe the state of various networking and connection
operations.
Figure 3 Gateway - Front Panel
1
2
3
WLAN
Alert
4
5
LAN Status
Cable/DSL
3CRWE554G72
Enabled
OfficeConnect Wireless 11g Cable/DSL Gateway
1 Alert LED
Orange
Indicates a number of different conditions, as described below.
Off - The Gateway is operating normally.
Flashing quickly - Indicates one of the following conditions:
■
The Gateway has just been started up and is running a self-test
routine, or
Front Panel
■
The administrator has invoked the Reset to Factory Defaults
command, or
■
The system software is in the process of being upgraded
15
In each of these cases, wait until the Gateway has completed the current
operation and the alert LED is Off.
Flashing slowly - The Gateway has completed the Reset to Factory
Defaults process, and is waiting for you to reset the unit. To do this,
remove power, wait 10 seconds and then re-apply power. The Gateway
will then enter the start-up sequence and resume normal operation.
If you have used a cable to reset the unit to Factory Defaults, follow steps
5 to 7 in “Forgotten Password and Reset to Factory Defaults” on
page 85.
On for 2 seconds, and then off - The Gateway has detected and
prevented a hacker from attacking your network from the Internet.
Continuously on - A fault has been detected with your Gateway during
the start-up process. Refer to Chapter 6 “Troubleshooting”.
2 Power LED
Green
Indicates that the Gateway is powered on.
3 Wireless LAN (WLAN) Status LED
Yellow
If the LED is on it indicates that wireless networking is enabled. If the LED
is flashing, data is being transmitted or received. If the LED is off, the
Wireless LAN has been disabled in the Gateway, or there is a problem.
Refer to Chapter 6 “Troubleshooting”.
4 Four LAN Status LEDs
Green (100Mbps link) / yellow (10Mbps link)
If the LED is on, the link between the port and the next piece of network
equipment is OK. If the LED is flashing, the link is OK and data is being
transmitted or received. If the LED is off, nothing is connected, the
connected device is switched off, or there is a problem with the
connection (refer to Chapter 6 “Troubleshooting”). The port will
automatically adjust to the correct speed and duplex.
16
CHAPTER 1: INTRODUCING THE GATEWAY
5 Cable/DSL Status LED
Green (100Mbps link) / yellow (10Mbps link)
If the LED is on, the link between the Gateway and the cable or DSL
modem is OK. If the LED is flashing, the link is OK and data is being
transmitted or received. If the LED is off, nothing is connected, the
modem is switched off or there is a problem (refer to Chapter 6
“Troubleshooting”).
Rear Panel
The rear panel (Figure 4) of the Gateway contains four LAN ports, one
Ethernet Cable/DSL port, a power adapter OK LED, and a power adapter
socket.
Figure 4 Gateway - Rear Panel
6
7
8
OK
9
10
Ethernet
Cable/
DSL
4
6
LAN
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 Power Adapter Socket
Only use the power adapter supplied with this Gateway. Do not use any
other adapter.
8 Power Adapter OK LED
Green
Indicates that the power adapter is supplying power to the Gateway. If
the LED is off, there may be a problem with the power adapter or adapter
cable.
9 Ethernet Cable/DSL port
Use the supplied patch cable to connect the Gateway to the Ethernet
port on your cable or DSL modem. The port will automatically adjust to
the correct speed and duplex, and will set itself to MDI or MDIX
Rear Panel
17
depending on the device to which they are connected and the type of
cable used.
10 Four 10/100 LAN ports
Using suitable RJ-45 cable, you can connect your Gateway to a computer,
or to any other piece of equipment that has an Ethernet connection (for
example, a hub or a switch). The LAN ports will automatically set
themselves to MDI or MDIX depending on the device to which they are
connected and the type of cable used.
18
CHAPTER 1: INTRODUCING THE GATEWAY
2
Introduction
HARDWARE INSTALLATION
This chapter will guide you through a basic installation of the Gateway,
including:
■
Connecting the Gateway to the Internet.
■
Connecting the Gateway to your network.
■
Setting up your computers for networking with the Gateway.
Safety Information
WARNING: Please read the “Safety Information” section in Appendix D
before you start.
VORSICHT: Bitte lesen Sie den Abschnitt “Wichtige Sicherheitshinweise”
sorgfältig durch, bevor Sie das Gerät einschalten.
AVERTISSEMENT: Veuillez lire attentivement la section “Consignes
importantes de sécurité” avant de mettre en route.
Positioning the
Gateway
You should place the Gateway in a location that:
■
is conveniently located for connection to the cable or DSL modem that
will be used to connect to the Internet.
■
is centrally located to the wireless computers that will connect to the
Gateway. 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.
20
CHAPTER 2: HARDWARE INSTALLATION
When positioning your Gateway, ensure:
Using the Rubber
Feet
Wall Mounting
■
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.
Use the four self-adhesive rubber feet to prevent your Gateway from
moving around on your desk or when stacking with other flat top
OfficeConnect units. Only stick the feet to the marked areas at each
corner of the underside of your Gateway.
There are two slots on the underside of the Gateway that can be used for
wall mounting.
When wall mounting the unit, ensure that it is within reach of the power
outlet.
You will need two suitable screws to wall mount the unit. To do this:
1 Ensure that the wall you use is smooth, flat, dry and sturdy and make two
screw holes which are 150 mm (5.9 in.) apart.
2 Fix the screws into the wall, leaving their heads 3 mm (0.12 in.) clear of
the wall surface.
3 Remove any connections to the unit and locate it over the screw heads.
When in line, gently push the unit on to the wall and move it downwards
to secure.
When making connections, be careful not to push the unit up and off the
wall.
CAUTION: Only wall mount single units, do not wall mount stacked
units.
Before you Install your Gateway
Before you Install
your Gateway
21
Before you install and configure your Gateway, you need the following
additional information. If you do not have this information, contact your
Internet Service Provider (ISP). Space is provided below for you to record
this information.
If you have a DSL connection and your ISP allocates IP information
dynamically over PPPoE, you need a User Name and Password:
PPPoE User Name
: ______________________
PPPoE Password
: ______________________
PPPoE Service Name
: ______________________
If you have a DSL connection and your ISP allocates IP information
dynamically over PPTP, you need a User Name, Password and PPTP Server
Address:
PPTP User Name
: ______________________
PPTP Password
: ______________________
PPTP Server Address
: ____.____.____.____
You only need a PPPoE Service Name if your ISP requires one. Do not
enter anything if your ISP does not require this information.
If your ISP allocates fixed or static IP information, you need the following
information:
IP Address
: ____.____.____.____
Subnet Mask
: ____.____.____.____
Default Gateway address : ____.____.____.____
DNS address
: ____.____.____.____
22
CHAPTER 2: HARDWARE INSTALLATION
If your ISP allocates IP information dynamically over a protocol other than
PPPoE, you do not need any further information. This configuration is
typical of cable connections.
Powering Up the
Gateway
To power up the Gateway:
1 Plug the power adapter into the power adapter socket located on the
back panel of the Gateway.
2 Plug the power adapter into a standard electrical wall socket.
Connecting the
Gateway
The first step for installing your Gateway is to physically connect it to a
cable or DSL modem and then connect it to a computer in order to be
able to access the Internet. See Figure 5:
Figure 5 Connecting the Gateway
Power
Supply Unit
Your existing
Cable/DSL Modem
net
Inter
3Com OfficeConnect
Wireless 11g Cable/DSL
Gateway
Wireless
Users
Your PC
To use your Gateway to connect to the Internet through an external cable
or DSL modem:
1 Insert one end of the supplied Ethernet (RJ-45 Category 5) cable into the
Cable/DSL port on the rear panel of the Gateway.
2 Insert the other end of the cable into the RJ-45 port on your cable or DSL
modem. Check that the Cable/DSL status LED lights on the Gateway.
3 Connect the cable or DSL modem to the Internet.
Connecting the Gateway
23
4 Connect your computer to one of the four LAN ports on the Gateway
using a twisted pair cable. Check that the corresponding LAN status LED
on the Gateway lights.
You have now completed the hardware installation of your Gateway.
Next you need to set up your computers so that they can make use of the
Gateway to communicate with the Internet.
3Com recommends that you perform the initial Gateway configuration
from a computer that is directly connected to one of the LAN ports.
If you configure the Gateway from a wireless computer, note that you
may lose contact with the Gateway if you change the wireless
configuration.
To communicate wirelessly with your Gateway, your wireless NIC should
be set as follows:
■
Encryption — none
■
Service Area Name/SSID — 3Com
■
Channel — 11
24
CHAPTER 2: HARDWARE INSTALLATION
3
SETTING UP YOUR COMPUTERS
The Gateway 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. If your computers are configured with fixed or static
addresses and you do not wish to change this, then you should use the
Discovery program on the Gateway CD-ROM to detect and configure
your Gateway. Refer to Appendix A for information on using the
Discovery program.
Obtaining an IP
Address
Automatically
Windows 2000
If you are using a Windows 2000-based computer, use the following
procedure to change your TCP/IP settings:
1 From the Windows Start Menu, select Settings > Control Panel.
2 Double click on Network and Dial-Up Connections.
3 Double click on Local Area Connection.
4 Click on Properties.
5 A screen similar to Figure 6 should be displayed. Select Internet Protocol
TCP/IP and click on Properties.
26
CHAPTER 3: SETTING UP YOUR COMPUTERS
Figure 6 Local Area Properties Screen
6 Ensure that the options Obtain an IP Address automatically, and Obtain
DNS server address automatically are both selected as shown in Figure 7.
Click OK.
Figure 7 Internet Protocol (TCP/IP) Properties Screen
7 Restart your computer.
Obtaining an IP Address Automatically
27
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.
28
CHAPTER 3: SETTING UP YOUR COMPUTERS
Disabling PPPoE
and PPTP Client
Software
If you have PPPoE or PPTP client software installed on your computer, you
will need to disable it. To do this:
1 From the Windows Start menu, select Settings > Control Panel.
2 Double click on Internet Options.
3 Select the Connections Tab. A screen similar to Figure 8 should be
displayed.
4 Select the Never Dial a Connection option.
Figure 8 Internet Properties Screen
You may wish to remove the PPPoE client software from your computer
to free resources, as it is not required for use with the Gateway.
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.
4
Accessing the
Wizard
RUNNING THE SETUP WIZARD
The Gateway 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 9). The Login screen displays.
Figure 9 Web Browser Location Field (Factory Default)
4 To log in as an administrator, enter the password (the default setting is
admin) in the System Password field and click Log in (Figure 10).
30
CHAPTER 4: RUNNING THE SETUP WIZARD
Figure 10 Gateway Login Screen
5 If the password is correct, the Country Selection screen will appear. Select
the country you wish to configure the Gateway for, then click Apply.
(Figure 11)
Figure 11 Country Selection Screen
6 When you have selected a country either:
■
The Welcome screen will appear (Figure 12). Select the Wizard tab
and click Wizard.
or
Accessing the Wizard
■
If your Gateway has not been configured before, the Wizard will
launch automatically (refer to Figure 13).
7 Click Next.
8 You will be guided step by step through a basic setup procedure.
Figure 12 Welcome Screen
Figure 13 Wizard Screen
31
32
CHAPTER 4: RUNNING THE SETUP WIZARD
Password
Figure 14 Change Administration Password Screen
When the Change Administration Password screen (Figure 14) appears,
type the Old Password, then a new password in both the New Password
and Confirm Password boxes.
3Com recommends entering a new password when setting up the
Gateway for the first time. The Gateway is shipped from the factory with
a default password, admin.
1. Password is case sensitive.
2. Write the new password down and keep it in a safe place, so that you
can change your settings in the future.
Click Next to display the Time Zone setup screen (Figure 15).
Time Zone
Figure 15 Time Zone Screen
Select your time zone from the pull-down menu, check the daylight
savings option if required, and then click Next.
Accessing the Wizard
33
The Daylight Savings option advances the system clock by one hour. It
does not cause the system clock to be updated for daylight savings time
automatically.
WAN Settings
Figure 16 Internet Settings Screen
This Internet Addressing Mode window allows you to set up the Gateway
for the type of Internet connection you have. Before setting up your
Internet connection mode, have the modem setting information from
your ISP ready.
Select an Internet Addressing mode from the following:
■
PPPoE is required (typically DSL users only) see page 34
■
ISP provides configuration dynamically (via DHCP) see page 35
■
ISP has provided a static IP address see page 36
■
PPTP is required (some DSL users in Europe) see page 37
and click Next.
For further information on selecting a mode see “Internet Settings” on
page 57.
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CHAPTER 4: RUNNING THE SETUP WIZARD
PPPoE Mode
Figure 17 PPPoE Screen
To setup the gateway for use with a PPP over Ethernet (PPPoE)
connection, use the following procedure:
1 Enter your PPP over Ethernet user name in the PPPoE User Name text box.
2 Enter your PPP over Ethernet password in the PPPoE Password text box.
3 Enter your PPP over Ethernet service name in the PPPoE Service Name text
box.
This is optional. Not all ISPs require a PPPoE service name.
Do not enter anything in this box if your ISP does not require a service
name.
4 Check all of your settings, and then click Next. Refer to “LAN Settings”
on page 38 for more information.
Accessing the Wizard
35
Dynamic IP Address Mode
To setup the Gateway for use with a dynamic IP address connection:
1 Select the ISP provides configuration dynamically (via DHCP) and then
click Next. See Figure 16.
Figure 18 Hostname Screen
2 Some ISPs require a host name. If your ISP has this requirement, enter the
host name in the Host Name text box (Figure 18) and click Next. The
Clone MAC Address screen displays.
Figure 19 Clone MAC Address Screen
3 If your ISP requires an assigned MAC address, select Yes, I would like to
enter a MAC address manually and enter the values for a MAC address if
required (Figure 19). If the computer you are now using is the one that
was previously connected directly to the cable modem, choose Yes,
please clone the MAC address from the PC I’m currently using.
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CHAPTER 4: RUNNING THE SETUP WIZARD
Static IP Mode
To setup the Gateway for use with a static IP address connection, use the
following procedure:
1 Select ISP has provided a static IP address, (see Figure 16) and then click
Next. Figure 20 displays.
Figure 20 Static IP Mode Screen
2 Enter your IP Address in the IP Address text box.
3 Enter your subnet mask in the Subnet Mask text box.
4 Enter your ISP gateway address in the Internet (ISP) Gateway Address text
box.
5 Enter your primary DNS address in the Primary DNS Address text box.
6 Enter your secondary DNS address in the Secondary DNS Address text
box.
This step is optional. Not all ISPs require a secondary DNS address.
7 Check all of your settings, and then click Next.
Accessing the Wizard
37
PPTP Mode
Figure 21 PPTP Mode Screen
To setup the gateway for use with a PPTP connection, use the following
procedure:
1 Enter your PPTP server address in the PPTP Server Address text box.
2 Enter your PPTP user name in the PPTP User Name text box.
3 Enter your PPTP password in the PPTP Password text box.
4 Enter your Primary DNS Address and Secondary DNS address.
Your ISP may provide you with primary and secondary DNS addresses. If
they have been provided, enter the addresses in the appropriate text
boxes. If not, leave 0.0.0.0 in the boxes.
5 Check all of your settings, and then click Next. Figure 22 displays.
Figure 22 PPTP IP Settings
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CHAPTER 4: RUNNING THE SETUP WIZARD
6 IP settings must be used when establishing a PPTP connection. Fill in the
Initial IP Address and the Initial Subnet Mask fields if your ISP has
provided you with these settings. Alternatively, if the PPTP server is
located in your DSL modem, click Suggest to select an IP address on the
same subnet as the PPTP server.
LAN Settings
Figure 23 LAN IP Address Screen
This screen displays a suggested LAN IP address and subnet mask of the
Gateway. It also allows you to change the IP address and subnet mask.
DHCP
The Gateway contains a Dynamic Host Configuration (DHCP) server that
can automatically configure the TCP/IP settings of every computer on
your network.
Figure 24 DHCP Server Setup Screen
To activate the DHCP Server option, select Enable the DHCP server with
the following settings: and specify the IP pool range. The largest available
continuous IP pool will be automatically entered; if this is not appropriate,
Accessing the Wizard
39
make your required changes. To disable DHCP, select Do not enable the
DHCP server. Click Next when you have finished.
Wireless Settings
Figure 25 Wireless Configuration Screen
This screen displays the Channel and Service Area Name. It also allows
you to change these settings. There are a maximum of 14 channels, the
number available to you is dependent on the country you reside in.
Selecting Clear Channel Select allows the Gateway to automatically select
an available channel when first powered on.
The Service Area Name default for 3Com products is “3Com”. Up to 32
(case sensitive) characters can be entered for the Service Area Name.
3Com strongly recommends that you change the SSID to something
other than the default.
If you are configuring the Gateway from a wireless computer any
changes you make to the wireless configuration will result in
communication between the Gateway and your computer being lost. This
is why 3Com strongly recommends that you configure the Gateway from
a wired computer.
It is very important that you set up your wireless clients to use the same
Service Area Name or SSID as the one you use on this screen. If your
clients use a different Service Area Name then they will not be able to
communicate with the Gateway.
The choice of channel is less important as Clients will generally search all
of the available channels. You should however make a note of the
40
CHAPTER 4: RUNNING THE SETUP WIZARD
channel you select as this may be useful if you experience problems with
your clients.
Summary
Figure 26 Configuration Summary Screen
When you complete the Setup Wizard, a configuration summary will
display. Verify the configuration information of the Gateway and then
click Finish to save your settings. 3Com recommends that you print this
page for your records.
If you have made changes to the LAN Settings or wireless configuration
options, you may need to reconfigure the computer you are using in
order to make contact with the Gateway again.
Your Gateway is now configured and ready for use.
For information on improving your Wireless network security see
“Wireless Settings” on page 47.
See Chapter 5 for a detailed description of the Gateway configuration
screens.
5
GATEWAY CONFIGURATION
Navigating
Through the
Gateway
Configuration
Pages
Main Menu
This chapter describes all the screens available through the Gateway
configuration pages, and is provided as a reference. To get to the
configuration pages, browse to the Gateway by entering the URL in the
location bar of your browser. The default URL is http://192.168.1.1
but if you changed the Gateway LAN IP address during initial
configuration, use the new IP address instead. When you have browsed
to the Gateway, log in using your system password (default admin).
At the left side of all screens is a main menu, as shown in Figure 27 on
page 42. When you click on a topic from the main menu, that page will
appear in the main part of the screen.
■
Welcome — displays the firmware version of the Gateway, allows you
to change your password, and launch the Wizard
■
LAN Settings — allows you to configure IP address and subnet mask
information, set up DHCP server parameters, and display the DHCP
client list.
■
Wireless Settings — enables /disables access from wireless computers,
and provides facilities for improving the security of the wireless
network.
■
Internet Settings — sets up Internet addressing modes such as PPPoE
and PPTP connections, allows you to clone the Gateway’s MAC
address, and set up dynamic IP address allocation and static IP address
settings.
■
Firewall — allows configuration of the Gateway’s firewall features:
Virtual Servers, Special Applications, PCs Privileges, URL Filtering and
Security options
■
System Tools — allows the administrator to perform maintenance
activities on the Gateway.
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CHAPTER 5: GATEWAY CONFIGURATION
Option Tabs
■
Status and Logs — displays the current status and activity logs of the
Gateway.
■
Support/Feedback — contains a comprehensive online help system
and allows you to provide 3Com with feedback on your Gateway.
Each corresponding menu page may also provide sub-sections which are
accessed through the use of tabs (see Figure 27 for example). To access a
sub-section, simply click on the required tab.
Getting Help
On every screen, a Help button is available which provides access to the
context-sensitive online help system. Click Help for further assistance and
guidance relating to the current screen.
Welcome Screen
Notice Board
The Welcome section allows you to view the Notice board and to change
your Password. You can also gain access to the Configuration Wizard.
(See “Accessing the Wizard” on page 29 for details).
Figure 27 Notice Board Screen
The Notice Board is used to display configuration warning messages. For
example, you would be warned if you had disabled wireless networking
or wireless encryption.
Welcome Screen
Password
43
Figure 28 Password Screen
Changing the Administration Password
You can change the password to prevent unauthorized access to the
Administration System. To do this:
1 Enter the current password in the Old Password field
2 Enter the new password in the New Password field
3 Enter the new password again in the Confirm Password field
4 Click Apply to save the new password
The password is case sensitive.
If you have forgotten your password you need to reset the Gateway. See
“Forgotten Password and Reset to Factory Defaults” on page 85
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CHAPTER 5: GATEWAY CONFIGURATION
Wizard
Figure 29 Wizard Screen
Click WIZARD... to launch the configuration wizard. Refer to Chapter 4
for information on how to run the wizard.
LAN Settings
Unit Configuration
The LAN Settings menu provides the following options:
Figure 30 Unit Configuration Screen
LAN Settings
45
The LAN Settings screen is used to specify the LAN IP address of your
Gateway, and to configure the DHCP server.
1 Select Unit Configuration and then specify the Gateway IP Address and
Subnet Mask in the LAN Settings field. 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 Enable
check box.
3 Clicking Auto Range will automatically choose the largest available range
of addresses for your network.
4 Check all of your settings, and then click Apply.
The DHCP server will give out addresses to both wired and wireless
clients.
DHCP Clients List
Figure 31 DHCP Clients List Screen
The DHCP Clients List provides details on the devices that have received IP
addresses from the Gateway. The list is only created when the Gateway 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
46
CHAPTER 5: GATEWAY CONFIGURATION
■
client’s network card.
■
Client Type — Whether the client is connected to the Gateway by
wired or wireless connection.
■
Fix — This box is checked if the IP address is fixed to the MAC address
of the client’s network card. Clients that have fixed addresses will get
the same IP address each time they connect.
Check the box to fix an association. Uncheck the box to remove the
fixed association.
As you connect more devices, the client list will grow to a maximum
number of 253 clients.
The release button allows the lease time for the IP address that has been
issued to a device to be cleared. The lease time is set at 12 hours. If a PC
has been switched off, using the Release button would allow the 12 hour
lease time to be cleared. The IP address would then be available for
another device if there were no other IP addresses available.
Adding Fixed DHCP Mappings
You can add Fixed Mappings so that the Gateway allocates an IP address
chosen by you when it encounters a particular device.
You only need to create Fixed Mappings for devices that need a specific IP
address. For devices that do not need a specific IP address, the Gateway
will automatically allocate addresses.
To add a Fixed Mapping:
1 Click New. The DHCP Fixed Mapping Setup screen will be displayed.
2 Enter the MAC Address for which you want to create a Fixed Mapping in
the MAC Address of Client box.
The MAC Address must be entered as 6 hexadecimal pairs, e.g.
12-34-56-78-90-ab.
3 Enter the IP Address that you want to reserve in the IP Address for client
box.
4 Click Add to add the Fixed Mapping or Close to close the window
without adding the Fixed Mapping.
The Fixed DHCP Mapping will be displayed in the DHCP Clients list as a
Fixed Association.
Wireless Settings
47
Wireless Settings
To improve the security of your wireless network, 3Com recommends
that you:
1. Change the SSID from its default value - see page 48
2. Enable Encryption - see page 49
3. Enable Connection Control - see page 53
Configuration
Figure 32 Configuration Screen
Enable Wireless Networking
Allows you to enable/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 Gateway.
Channel Selection
The Channel Selector allows you to specify which Channel the Gateway
will transmit and receive on. If another access point or gateway nearby is
using the same Channel as you, there will be a reduction in the
performance of your network. If this seems to be the case, you should
select a different channel number. Usually the Wireless computers will
scan to find the correct channel, but if they don't you must configure
them to use the same Channel number as the Gateway.
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CHAPTER 5: GATEWAY CONFIGURATION
Choose the Clear Channel Select option to automatically choose the
clearest channel. The Gateway will check for the clearest channel
whenever it is rebooted, powered up, and when the Clear Channel Select
option is first applied.
Valid channels are country dependent. See “Channels” on page 121 for
a list of channels approved by each country.
Service Area Name/SSID
This allows you to name your Wireless network. The field will accept any
alphanumeric string and has a maximum length of 32 characters. Your
Wireless computers must be configured with exactly the same name or
you will not establish a connection. The Service Area Name may also be
referred to as “ESSID” depending on your networking vendor. By default
the Gateway uses the name “3Com”. 3Com recommends that you
change the default name.
In order that your wireless computers can connect to the Gateway, you
must:
■
Use Infrastructure Mode not Adhoc Mode.
■
Have the same Service Area Name as the Gateway.
■
Have the same Channel number as the Gateway.
■
Use the same encryption type and keys as the Gateway.
■
Ensure that the PC is included in the authorized Wireless PCs list if
Connection Control is enabled. See page 53.
Enable Broadcast SSID
This feature can be used to improve the security of your wireless network.
When the tickbox is checked, the Gateway will broadcast the Service
Area Name/SSID of your wireless network. This will allow unauthorized
clients from detecting your SSID and attempting to connect to your
network.
If you have a wireless client that can detect all the available SSIDs in your
area, your client will not list the Gateway SSID unless this feature is
enabled. The clients will still be able to connect, provided that they are
supplied with the SSID.
Wireless Settings
49
3Com recommends that you install your wireless network with this
feature enabled and then disable it once you have set up the Gateway
and wireless clients.
Encryption
When setting up wireless networks, it is important to remember that with
encryption disabled, anyone with a Wireless PC can eavesdrop on your
network. 3Com recommends that you get the network working with
encryption disabled first and then enable it as the last step. This will
simplify setting up your network.
The Gateway supports two types of encryption:
■
WPA — Wi-Fi Protected Access (WPA) is a 256 bit encryption method
with keys that change over time.
■
WEP — Wireless Equivalent Privacy (WEP) is a 64 bit or 128 bit
encryption method with user configurable fixed keys.
WPA provides a higher level of security, provided by its longer key and
dynamic changes made to the key over time. 3Com recommends that
you use WPA with any clients which support it.
If you enable encryption on the Gateway, you must reconfigure your
wireless PCs to use exactly the same Encryption Type and Keys otherwise
the devices will not understand each other.
The encryption methods used by the Gateway secure data transmitted
through wireless communications between the Gateway and its wireless
clients. Enabling encryption has no security effect on data transmitted
through wired (Ethernet) connections or through your connections to the
Internet.
Configuring WPA
Encryption
The only configuration that is needed for WPA is to enter the pre-shared
key. This key is used to start the dialog between the Gateway and the
client. During this dialog, a new key is agreed, making it more difficult to
eavesdrop on wireless networks encrypted using WPA, than those
encrypted using WEP. The pre-shared key can be entered as a 256 bit
series of hexadecimal digits or as a pass-phrase.
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CHAPTER 5: GATEWAY CONFIGURATION
Figure 33 Encryption Keys Screen showing WPA configuration
To enter the pre-shared key as hexadecimal digits:
1 Select Enabled - Manual Pre-shared Key from the WPA Encryption Type
drop-down box.
2 Enter a pair of hexadecimal digits in each of the 32 Key fields. Each field
can contain a hexadecimal number from 00 to ff, for example 1a.
3 Click Apply to generate the key.
To enter the pre-shared key as a pass-phrase:
1 Select Enabled - Pre-Shared Passphrase from the WPA Encryption Type
drop-down box.
2 Enter a phrase of between 8 and 63 characters in length in the
Passphrase field. This passphrase will be used to generate a 256 bit key.
3 Click Apply to generate the key.
Configuring WEP
Encryption
There are two levels of WEP encryption available, 64 bit (sometimes
referred to as 40 bit) and 128 bit. Use the WEP Encryption Type box to
select the desired level.
Wireless Settings
51
Encryption Keys
Figure 34 Encryption Keys Screen showing WEP configuration
A Key is a hexadecimal (0-9, A-F) number used to encrypt and decrypt the
data. There can be up to 4 keys and each key can be as long as 26 digits.
The Gateway also offers a number of methods for converting plain text
into hex keys. The text is much easier to remember than hex keys but it
relies on your wireless adapters also supporting this feature. Different
manufacturers have developed different ways of converting plain text
and so interoperability is not guaranteed. If you are experiencing
difficulty, the Manual Hex Key method is supported by most vendors.
There are four methods available to generate the encryption keys:
■
Manual Key Entry - This method allows you to manually enter hex
keys. Virtually all manufacturers support this scheme. Enter a two digit
hexadecimal number in every box. Hexadecimal numbers are formed
from 0-9 and A-F.
■
3Com Encryption String - This method is supported by 3Com Wireless
products. The string can contain any alphanumeric characters and
must be between 6 and 30 characters long. A single string will
automatically generate 4 unique keys for 64 or 128 bit WEP.
■
ASCII - This method is supported by some adapter cards running
under Windows XP. The string must be exactly 5 characters for 64 bit
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CHAPTER 5: GATEWAY CONFIGURATION
WEP and 13 characters for 128 bit WEP. You must enter a separate
string for each of the 4 Keys. You can leave a string blank provided
this Key is not selected as the Active Transmit Key.
■
Passphrase - This is another common method and similar to the 3Com
Encryption string. In 64 bit WEP, the passphrase will generate 4
different keys. However, in 128 bit WEP, this method only generates 1
key which is replicated for all 4 keys. The passphrase can be up to 31
characters long and may contain any alphanumeric characters.
Select the key generation method you wish to use from the drop down
list. If you have other wireless products choose the scheme that is
compatible with these, then enter the appropriate information.
If you encounter any difficulty when you enable WEP ensure that you
check that each key on your wireless computer is exactly the same as
each key on your Gateway. In other words, Key number 1 on the Wireless
computer must have the same Hex number as Key number 1 on the
Gateway, Key 2 on the Wireless computer must match Key 2 on the
Gateway and so on.
The Active Transmit Key selects which of the 4 Keys the Gateway uses
when it transmits. You can change the selected key periodically to
increase the security of your network.
Some wireless adapters have only one key available on their WEP
configuration page. If this is the case ensure it is the same as Key 1 on the
Gateway and that it is selected as the active transmit key.
Wireless Settings
Connection Control
53
Figure 35 Connection Control Screen
A higher level of security can be achieved for your wireless network if you
use both encryption and you specify only certain wireless computers can
connect to the Gateway. By default, any wireless computer that has the
same Service Area Name/SSID, channel and encryption settings as the
Gateway can connect to it.
Select Only Authorized Wireless PCs can connect to the Gateway to
enable and configure this feature.
If you enable this feature from a Wireless PC, it will automatically be
added to the Authorized Wireless PC list.
Authorized Wireless PCs
Figure 36 Connection Control Detail Screen
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CHAPTER 5: GATEWAY CONFIGURATION
To create a list of Wireless computers that can access the Gateway:
1 Press New. The screen shown in Figure 36 opens.
2 Select the MAC addresses of the Wireless PCs for which you want to
allow access.
To select multiple MAC addresses, hold down the Ctrl key while clicking
on the addresses.
The drop down list on the Connection Control window will contain the
MAC addresses of all Wireless PCs that are in range, currently operating,
and have the same Service Area Name/SSID, channel and encryption
settings as the Gateway. You will find this screen easier to use if you set
up and make a note of all of your wireless PC's on your network first. You
may also add the entries manually if you know the MAC address.
To add a MAC address that is not in the list, enter the MAC address in
the appropriate fields. A MAC address consists of 12 characters. Valid
characters are '0-9', and 'A-F'.
3 Press Add.
Click Close to discard all changes.
Modifying a MAC Address
1 Click on the MAC address to be modified in the table (Figure 37).
2 Modify the MAC address.
3 Press Apply to accept the changes.
Figure 37 MAC Address Table
Click Close to discard all changes.
Deleting a MAC Address
The connection rights for a Wireless PC listed in the table can be removed
by pressing Delete for that entry in the table.
Wireless Settings
55
Once an entry has been deleted it cannot be undone. Please wait 30
seconds for changes to take effect.
Client List
Figure 38 Client List Screen
The Wireless Client List provides details on the devices that are connected
to the Wireless LAN. The list is only created when Wireless Networking is
enabled. For each device that is connected to the Wireless LAN, the MAC
address and Connection Speed of that device is displayed. As you
connect more devices to the Wireless LAN, the client list will grow to a
maximum of 32 (the maximum number of wireless devices that the
Gateway can support).
Profile
Figure 39 Profile Screen
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CHAPTER 5: GATEWAY CONFIGURATION
Some 3Com Wireless Network Adapters allow you to import Wireless
configurations via a ‘profile’. The Gateway can generate a profile so that
you do not need to configure your Wireless PCs manually.
The profile contains three items as follows:
■
Service Area Name/SSID of the Gateway
This is configured on the Configuration tab under the Wireless
Settings option.
■
Encryption settings from the Gateway
This is configured on the Encryption tab under the Wireless Settings
option.
■
Profile Name
This is used to identify the profile once it has been imported into the
Wireless Network Adapter configuration software.
To set up a profile (once the Service Area Name/SSID and Encryption
settings have been configured in the Gateway):
1 Enter a Profile Name (up to 25 alphanumeric characters) and then click
Save Profile.
2 Your browser will then prompt you to enter a file name and folder
location in which to save the profile. Once the profile has been saved it
can be copied on to another PC and imported into the 3Com Wireless
Network Adapter.
For instructions on how to import a profile, refer to the User Guide that
accompanies your 3Com Wireless Network Adapter(s).
If, once the profile is imported, the Wireless Network Adapter cannot
connect to the Gateway, check that:
■
the adapter is within range of the Gateway
if Connection Control has been enabled in the Gateway, the MAC
address of the Wireless Network Adapter must be included in the list of
authorized Wireless PCs.
Internet Settings
Internet Settings
57
Before you can configure the Gateway, you need to know the IP
information allocation method used by your ISP. There are four different
ways that ISPs can allocate IP information, as described below:
1 Static IP Address (DSL or Cable)
The ISP provides the IP addressing information for you to enter manually.
To configure the Gateway you will need to know the following:
■
IP Address
■
Subnet Mask
■
ISP Gateway
■
DNS address(es)
2 Dynamic IP Address (DSL or Cable)
Dynamic IP addressing (or DHCP) automatically assigns the Gateway IP
information. This method is popular with Cable providers. This method is
also used if your modem has a built in DHCP server.
3 PPPoE (DSL only)
If the installation instructions that accompany your modem ask you to
install a PPPoE client on your PC, then select this option. To configure the
Gateway you will need to know the following:
■
Username
■
Password
■
Service Name (if required by your ISP)
When you install the Gateway, you will not need to use the PPPoE
software on your PC.
4 PPTP (DSL or Cable)
PPTP is only used by some European providers. If the installation
instructions that accompany your modem ask you to setup a dialup
connection using a PPTP VPN tunnel then select this option. To configure
the Gateway you will need to know the following:
■
Username
■
Password
■
VPN Server address (usually your modem)
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CHAPTER 5: GATEWAY CONFIGURATION
When you install the Gateway, you will not need to use the dialup VPN
on your PC anymore.
Connection to ISP
Figure 40 Connection to ISP Screen
Before beginning this section, ensure you have the required information
from your ISP. (See “Before you Install your Gateway” on page 21.)
Select Internet Settings from the main menu to display Connection to ISP
(Figure 40). Choose an IP Allocation Mode from the drop down box.
Select an IP Allocation Mode from the following:
■
Static IP address (to be specified manually) see page 59
■
Dynamic IP address (automatically allocated) see page 60
■
PPPoE (used by DSL providers only) see page 61
■
PPTP (used by some European providers) see page 62
Internet Settings
59
Static IP Address
Figure 41 Connection Parameters Screen - Static IP
To setup the Gateway for use with a Static IP address connection:
1 Select Static IP Address (to be specified manually) in the IP Allocation
Mode field (Figure 41).
2 Enter your IP Address in the IP Address text box.
This information, along with the rest of the information in this screen,
should be provided to you by your ISP. If the information is already
entered, your ISP has pre-configured your Gateway, and you should go to
step 7.
3 Enter your subnet mask in the Subnet Mask text box.
4 Enter your ISP Gateway address in the ISP Gateway Address text box.
5 Enter your primary DNS address in the Primary DNS Address text box.
6 Enter your secondary DNS address in the Secondary DNS Address text
box.
This step is optional. Not all ISPs require a secondary DNS address.
7 Check all of your settings, and then click Apply.
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CHAPTER 5: GATEWAY CONFIGURATION
Dynamic IP Address
Figure 42 Connection Parameters Screen - Dynamic IP
If this mode is selected, your IP Address, Subnet Mask, and DNS Address
will be obtained automatically from your ISP. They are not displayed on
this screen, but may be viewed on the Status screen (click on Status and
Logs on the left hand menu bar).
To setup the Gateway for use with a dynamic IP address connection:
1 Select Dynamic IP Address (automatically allocated) in the IP Allocation
Mode field. (Figure 42)
2 Enter your Primary DNS Address and Secondary DNS address.
Your ISP may provide you with primary and secondary DNS addresses. If
they have been provided, enter the addresses in the appropriate text
boxes. If not, leave 0.0.0.0 in the boxes.
3 Enter the Host Name (optional).
Some ISPs require a host name. If your ISP has this requirement, enter the
host name in the Host Name text box.
4 If you use ‘Cable’, your ISP may use your MAC address to authenticate
you. If this is the case, you will need to ‘Clone’ your MAC address. There
are three options:
■
Use the Gateway’s original Internet MAC address - This field is
selected by default and is automatically filled in with the MAC address
of the Gateway.
Internet Settings
61
■
Use this PC’s MAC address - This field is automatically filled in with the
MAC address of the PC you are using to configure the Gateway. You
should use this address only if you were previously using this
computer to connect directly to your modem.
■
Enter a new MAC address manually - Use this option if you want to
specify a new MAC address. Enter the new MAC address.
5 Check all settings and click Apply.
PPP over Ethernet
Figure 43 PPPoE Setup Screen
To setup the Gateway for use with a PPP over Ethernet connection, use
the following procedure:
1 Select PPP over Ethernet in the IP Allocation Mode field. (Figure 43)
2 Enter your Primary DNS Address and Secondary DNS address.
Your ISP may provide you with primary and secondary DNS addresses. If
they have been provided, enter the addresses in the appropriate text
boxes. If not, leave 0.0.0.0 in the boxes.
3 Enter the Host Name (optional).
Some ISPs require a host name. If your ISP has this requirement, enter the
host name in the Host Name text box.
4 Enter your PPP over Ethernet user name in the PPPoE User Name text box.
5 Enter a password in the PPPoE Password text box.
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CHAPTER 5: GATEWAY CONFIGURATION
6 Enter your PPP over Ethernet service name in the PPPoE Service Name text
box. Not all ISPs require a PPPoE service name. Only enter a service name
if your ISP requires this.
7 Select an idle time from the Maximum Idle Time drop-down list.
This value will correspond to the amount of idle time (no Internet activity)
that will pass before the Gateway automatically ends your PPP over
Ethernet session.
Since the Gateway contains its own PPPoE client, you no longer need to
run PPPoE client software on your computer to access the Internet.
PPTP
Figure 44 PPTP Setup Screen
To setup the Gateway for use with a PPTP connection, use the following
procedure:
1 Select PPTP (used by some European providers) in the IP Allocation Mode
field. (Figure 44)
2 Enter your PPTP server address in the PPTP Server Address text box (this is
typically the address of your modem).
3 Enter your PPTP user name in the PPTP User Name text box.
4 Enter your password in the PPTP Password text box.
Firewall
63
5 Enter your Primary DNS Address and Secondary DNS address.
Your ISP may provide you with primary and secondary DNS addresses. If
they have been provided, enter the addresses in the appropriate text
boxes. If not, leave 0.0.0.0 in the boxes.
6 Select an idle time from the Maximum Idle Time drop-down list.
This value will correspond to the amount of idle time (no Internet activity)
that will pass before the Gateway automatically ends your PPTP session.
7 IP settings must be used when establishing a PPTP connection. Fill in the
Initial IP Address and the Initial Subnet Mask fields if your ISP has
provided you with these settings. Alternatively, if the PPTP server is
located in your DSL modem, click Suggest to select an IP address on the
same subnet as the PPTP server.
Firewall
Virtual Servers
On the main frame of the Firewall setup screen is a menu with five tabs:
Virtual Servers, Special Applications, PCs Privileges, URL Filter, and
Security.
Selecting the Firewall option on the main menu displays the Virtual
Servers setup screen. (Figure 45)
Virtual DMZ
Figure 45 Virtual Servers Screen
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CHAPTER 5: GATEWAY CONFIGURATION
DMZ (De-Militarized Zone) Host is a computer without the protection of
the firewall. This feature allows a single computer to be exposed to
unrestricted 2-way communication from outside of your network. This
feature should be used only if the Virtual Server or Special Applications
options do not provide the level of access needed for certain applications.
To configure one of your computers as a DMZ host, enter the last digit(s)
of the IP address of the computer in the IP Address of DMZ Host text box,
and then click Apply.
Virtual Server
Activating and configuring a virtual server allows one or more of the
computers on your network to function as a public server. For example,
one of your computers could be configured as an FTP server, allowing
others outside of your office network to download files of your choosing.
Or, if you have created a Web site, you can configure one of your
computers as a Web server, so that others can view your Web site.
To configure a virtual server:
1 Click New on the right side of the screen to open the Virtual Server
Settings dialogue box. (Figure 46)
2 Enter the last digit(s) of the IP address of the computer in the Server IP
Address text box.
3 Select the Service from the pull-down list. (Figure 46)
Figure 46 Virtual Servers Settings Screen
Firewall
65
Or select Custom to specify a suitable name for the service and then enter
the port numbers required for that service. (Figure 47)
Figure 47 Custom Setup Screen
4 Click Add to save the settings.
The port numbers are specified using a comma-separated list, with
hyphens to denote port number ranges. So for example, entering 2, 3,
5-7 would cause ports 2, 3, 5, 6, and 7 to be activated.
Special Applications
Figure 48 Special Applications Screen
Select Special Applications tab to display Authorized Application setup
screen. (Figure 48)
Some software applications require special or multiple connections to the
Internet and these would normally be blocked by the firewall. For
example Internet Telephony or Video conferences require multiple
connections.
So that these special applications can work properly and are not blocked,
the firewall needs to be told about them. In each instance there will be a
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CHAPTER 5: GATEWAY CONFIGURATION
trigger port and incoming port(s), where traffic on the trigger port tells
the firewall to open the incoming ports.
Each defined Special Application only supports a single computer user,
and up to 10 Special Applications can be defined. Any incoming ports
opened by a Special Application trigger will be closed after five minutes
of inactivity.
To configure special applications:
1 Click New.
2 Select the applications from the pull-down list. (Figure 49)
Figure 49 Special Application Settings Screen
Or select Other to specify a suitable name for the special application and
then enter a value in the Trigger Port and Incoming Ports text boxes
(Figure 49). These values correspond to the outbound port numbers
issued by the application.
The port numbers are specified using a comma-separated list, with
hyphens to denote port number ranges. So for example, entering 2, 3,
5-7 would cause ports 2, 3, 5, 6, and 7 to be activated.
The Gateway will automatically allow FTP and NetMeeting sessions. You
do not need to configure these as Special Applications.
Firewall
67
Figure 50 Other Applications Setup Screen
3 Click Add to save your settings.
Only one computer on your network can use the special application at
any one time.
PC Privileges
Figure 51 PC Privileges Screen
Select PC Privileges to display the PC Privilege setup screen (Figure 51).
Access from the local network to the Internet can be controlled on a
computer-by-computer basis. In the default configuration the Gateway
will allow all connected computers unlimited access to the Internet.
PC Privileges allows you to assign different access rights for different
computers on your network.
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CHAPTER 5: GATEWAY CONFIGURATION
To use access control for all computers:
1 Click PCs access authorized services only.
2 Select All PCs to setup the access rights for all computers connected to
the Gateway.
3 Select authorized services by clicking in the appropriate check box(es)
(Figure 52).
Figure 52 All PCs Setup Screen
In addition to the four authorized services listed, you can choose to allow
or block access to other services. You can either:
■
Allow all other services with exceptions, or
■
Block all other services with exceptions
4 To do this, select Allow or Block from the drop down menu and enter the
exceptions into the text box.
The port numbers are specified using a comma-separated list, with
hyphens to denote port number ranges. So for example, entering 2, 3,
5-7 would cause ports 2, 3, 5, 6, and 7 to be activated.
For example, to block access to all services except Web (80) and a service
that uses ports 2,3,5,6 and 7:
1. Tick the Web(80) check box.
2. Select ‘Block’ all other services.
3. Enter ‘2, 3, 5-7’ in the ‘except (specify ports) box. See Figure 53.
Firewall
69
Figure 53 PC Privileges Setup Screen Example
5 Click Modify to save the settings or Close to discard them.
To assign different access rights for different computers:
1 If not already selected, click PCs access authorized services only.
2 Click New to display the PC Privileges setting screen.
3 Enter the last digit(s) of the IP address of the computer in the PC’s IP
Address text box.
4 Select authorized services by clicking in the appropriate check box(es).
In addition to the four authorized services listed, you can choose to allow
or block access to other services. You can either:
■
Allow all other services with exceptions, or
■
Block all other services with exceptions
See step 4 of the previous section for more details.
5 Click Add to save the settings.
URL Filter
Select URL Filter to control your clients’ access to Web sites. The
Gateway’s URL Filter has three settings:
■
Disabled — Users can browse all Web sites. None will be filtered.
■
Deny List — Users can browse all Web sites apart from those sites
listed in the deny list and those whose URLs contain keywords listed in
the deny list. See “Deny List” on page 70.
■
Allow List — Users are unable to browse any Web sites except of
those listed in the allow list and those whose URLs contain keywords
listed in the allow list. See “Allow List” on page 71.
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CHAPTER 5: GATEWAY CONFIGURATION
Deny List
To allow users access to all Web sites except for those you choose to
block, choose Deny List in the URL Filter Type drop-down box (Figure 54).
Figure 54 URL Filter Screen showing Deny List
To filter a specific site, enter the URL for that site. For example, to stop
your users from browsing a site called www.badsite.com, enter
www.badsite.com or badsite.com in one of the fields.
If badsite.com has multiple sub-domains, such as this.badsite.com and
that.badsite.com then you can either:
■
Block them individually by entering this.badsite.com in one field
and that.badsite.com in another.
or
■
Block them by entering the keyword badsite.com into one of the
fields. This will block all URLs containing the string badsite.com. As
well as blocking this.badsite.com and that.badsite.com,
the keyword badsite.com would block searches that mentioned
badsite.com in their domain name, for example
www.notabadsite.com.
To filter a generic keyword enter it into one of the fields. You should
exercise caution when choosing a keyword as many keywords are
Firewall
71
contained within other words. For example, filtering the word sex would
filter the following example URLs:
■
www.sussex.com
■
www.thisexample.com
You can filter up to 30 keywords and URLs.
Computers that should not be subject to URL filtering can be excluded by
ticking the Bypass URL Filter checkbox in the PC Privileges setup screen.
See “PC Privileges” on page 67.
Allow List
To stop users from accessing any Web sites that you have not specifically
allowed, choose Allow List in the URL Filter Type drop-down box
(Figure 55).
Figure 55 URL Filter Screen showing Allow List
To allow a specific site, enter the URL for that site. For example, to let
your users browse a site called www.goodsite.com, enter
www.goodsite.com or goodsite.com in one of the fields.
If goodsite.com has multiple sub-domains, such as
this.goodsite.com and that.goodsite.com then you can
either:
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CHAPTER 5: GATEWAY CONFIGURATION
■
Allow them individually by entering this.goodsite.com in one
field and that.goodsite.com in another.
or
■
Allow them by entering the keyword goodsite.com into one of the
fields. This will allow all URLs containing the string goodsite.com.
As well as allowing this.goodsite.com and
that.goodsite.com, the keyword goodsite.com would allow
sites that had the string goodsite.com in their URL, for example
xxxgoodsite.com.
To filter a generic keyword enter it into one of the fields. You should
exercise caution when choosing a keyword as sites that you may wish to
block may be allowed if you choose too general a keyword.
The Gateway filters all traffic from domains that have been blocked using
the URL filter. If need to access an external mail server, FTP server or other
named device outside your network, you must list it in one of the allow
fields.
You can filter up to 30 keywords and URLs.
Computers that should not be subject to URL filtering can be excluded by
ticking the Bypass URL Filter checkbox in the PC Privileges setup screen.
See “PC Privileges” on page 67.
Firewall
Security
73
Select Security to display the Security screen (Figure 56).
Figure 56 Security Screen
The Internet connects millions of computer users throughout the world.
The vast majority of the computer users on the Internet are friendly and
have no intention of breaking into, stealing from, or damaging your
network. However, there are hackers who may try to break into your
network.
Enable universal plug and play Universal plug and play allows
compatible software to read and change some the Gateway’s firewall
settings. This reduces the configuration required but lessens your control
of the Gateway’s firewall.
3Com recommends that you leave this feature disabled for maximum
security.
Allow PING from the Internet PING is a utility, which is used to
determine whether a device is active at the specified IP address. PING is
normally used to test the physical connection between two devices, to
ensure that everything is working correctly.
By default the Gateway has PING disabled in order to make the device
more difficult to find on the Internet and less prone to attack.
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CHAPTER 5: GATEWAY CONFIGURATION
This feature is enabled by clicking on the check box so that a tick can be
seen and then select Apply.
3Com recommends that you leave this disabled.
Enabling Remote Administration
It is possible to administer the Gateway remotely. This can be set to one
of four different levels using the following options:
1 Disable Remote Administration - This option is set as default.
2 Enable administration from a single Internet Host - Only the specified IP
address can manage the Gateway. Any other users will be rejected.
3 Enable administration from a whole subnet - This option allows a
number of users within a subnet to administer the Gateway.
4 Enable administration from any Internet Host - This options allows any
host to access the administration pages.
To remotely administer your Gateway, enter
http://xxx.xxx.xxx.xxx:8000 in the location bar of the browser
running on the remote computer, where xxx.xxx.xxx.xxx is the Internet IP
address of the Gateway. You may then login using the administration
password.
Your Internet IP address can be found at the bottom of the screen. See
Figure 56.
System Tools
System Tools
75
The main frame of the System Tools screen includes four administration
items: Restart, Time Zone, Configuration, and Upgrade (Figure 57).
Restart
Figure 57 Restart Screen
If your Gateway is not operating correctly, you can choose to restart the
Gateway by selecting Restart the Gateway, simulating the effect of
power cycling the unit. No configuration information will be lost but the
log files will be erased. This function may be of use if you are
experiencing problems and you wish to re-establish your Internet
connection. Any network users who are currently accessing the Internet
will have their access interrupted whilst the restart takes place, and they
may need to reboot their computers when the restart has completed and
the Gateway is operational again.
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CHAPTER 5: GATEWAY CONFIGURATION
Time Zone
Figure 58 Time Zone Screen
Choose the time zone that is closest to your actual location. The time
zone setting is used by the system clock when displaying the correct time
in the log files.
If you use Daylight saving tick the Enable Daylight savings box, and then
click Apply (Figure 58).
The Gateway reads the correct time from NTP servers on the Internet and
sets its system clock accordingly. The Daylight Savings option merely
advances the system clock by one hour. It does not cause the system
clock to be updated for daylight savings time automatically.
System Tools
Configuration
77
Figure 59 Configuration Screen
Select the Configuration tab to display the Configuration screen
(Figure 59).
Backup Configuration
Click BACKUP to save the current Gateway configuration. You will be
prompted to download and save a file to disk.
Restore Configuration Data
If you want to reinstate the configuration settings previously saved to a
file, press Browse to locate the backup file on your computer, and then
click RESTORE to copy the data into the Gateway's memory.
The password will remain unchanged.
Reset to Factory Default
If you want to reset the settings on your Gateway to those that were
loaded at the factory, click RESET. You will lose all your configuration
changes. The Gateway LAN IP address will revert to 192.168.1.1, and the
DHCP server on the LAN will be enabled. You may need to reconfigure
and restart your computer to re-establish communication with the
Gateway.
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CHAPTER 5: GATEWAY CONFIGURATION
Upgrade
Figure 60 Upgrade Screen
The Upgrade facility allows you to install on the Gateway any new
releases of system software that 3Com may make available. To install
new software, you first need to download the software from the 3Com
support web site to a folder on your computer. Once you have done this,
select Browse to tell your web browser where this file is on your
computer, and then click Apply. The file will be copied to the Gateway,
and once this has completed, the Gateway will restart. Although the
upgrade process has been designed to preserve your configuration
settings, it is recommended that you make a backup of the configuration
beforehand, in case the upgrade process fails for any reason (for
example, the connection between the computer and the Gateway is lost
while the new software is being copied to the Gateway).
The upgrade procedure can take up to two minutes, and is complete
when the Alert LED has stopped flashing and is permanently off. Make
sure that you do not interrupt power to the Gateway during the upgrade
procedure; if you do, the software may be corrupted and the Gateway
may not start up properly afterwards. If the Alert LED comes on
continuously after a failed upgrade, refer to Chapter 6,
“Troubleshooting”.
Status and Logs
Selecting Status and Logs from the main menu displays the Status, Usage,
and Logs screens in your Web browser window.
Status and Logs
Status
79
The Status screen displays a tabular representation of your network and
Internet connection. (Figure 61)
Figure 61 Status Screen
Usage
Usage displays an approximate count of the traffic since the Gateway was
last reset. (Figure 62)
The counts are approximate and should be used as a guide only. Contact
your ISP for accurate logging information.
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CHAPTER 5: GATEWAY CONFIGURATION
Figure 62 Usage Screen
Logs
Logs will allow you to view both the normal events, and security threats
logged by the Gateway.
Figure 63 Logs Screen
You may be asked to refer to the information on the Status and Logs
screens if you contact your supplier for technical support.
Support/Feedback
Selecting Support/Feedback from the main menu displays the Support
and Feedback screens.
Support/Feedback
Support
81
Figure 64 Support Screen
Selecting the Support option on the main menu displays the support links
screen, which contains a list of Internet links that provide information and
support concerning the Gateway (Figure 64).
Feedback
Figure 65 Feedback Screen
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CHAPTER 5: GATEWAY CONFIGURATION
Selecting the Feedback option displays the Feedback screen and allows
you to provide feedback to 3Com on the operation of your Gateway
(Figure 65). This screen should not be used to obtain technical support.
6
Basic Connection
Checks
Browsing to the
Gateway
Configuration
Screens
TROUBLESHOOTING
■
Check that the Gateway is connected to your computers and to the
cable/DSL modem, and that all the equipment is powered on. Check
that the LAN Status and Cable/DSL Status LEDs on the Gateway are
illuminated, and that any corresponding LEDs on the cable/DSL
modem and 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.
If you have connected your Gateway and computers together but cannot
browse to the Gateway configuration screens, check the following:
■
Confirm that the physical connection between your computer and the
Gateway 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 Gateway to ensure that your computer receives an
IP address.
■
When entering the address of the Gateway 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
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CHAPTER 6: TROUBLESHOOTING
Connections tab and click on the LAN Settings button at the bottom.
Make sure that the Proxy Server option is unchecked.
Connecting to the
Internet
■
If you cannot browse to the Gateway, use the winipcfg utility in
Windows 95/98/ME to verify that your computer has received the
correct address information from the Gateway. 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 Gateway 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
Gateway. Under Windows 2000, use the ipconfig command-line
utility to perform the same functions.
■
If you still cannot browse to the Gateway, then use the Discovery
program on the accompanying CD-ROM as described in Appendix A.
If you can browse to the Gateway configuration screens but cannot
access sites on the Internet, check the following:
■
Confirm that the physical connection between the Gateway and the
cable/DSL modem is OK, and that the link status LEDs on both
Gateway and modem are illuminated.
■
Confirm that the connection between the modem and the cable/DSL
interface is OK.
■
Ensure that you have entered the correct information into the
Gateway configuration screens as required by your Internet Service
Provider. Use the “Internet Settings” screen to verify this.
■
For DSL users, check that the PPPoE or PPTP user name, password and
service name are correct, if these are required. Only enter a PPPoE
service name if your ISP requires one.
■
For cable users, check whether your ISP requires a fixed MAC
(Ethernet) address. If so, use the Clone MAC Address feature in the
Gateway to ensure that the correct MAC address is presented, as
described on page 60.
■
For cable users, check whether your ISP requires a fixed Host Name. If
so, enter the required Host Name in the Internet Settings screen.
■
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.
Forgotten Password and Reset to Factory Defaults
Forgotten
Password and Reset
to Factory Defaults
85
If you can browse to the Gateway configuration screen but cannot log on
because you do not know or have forgotten the password, follow the
steps below to reset the Gateway 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
Gateway 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 Gateway.
2 Disconnect all your computers and the cable/DSL modem from the
Gateway.
3 Using a straight through Ethernet cable, connect the Ethernet Cable/DSL
port on the rear of the Gateway to any one of the LAN ports.
4 Re-apply power to the Gateway. The Alert LED will flash as the Gateway
starts up, and after approximately 30 seconds will start to flash more
slowly (typically 2 seconds on, 2 seconds off). Once the Alert LED has
started to flash slowly, remove power from the Gateway.
5 Remove the cable connecting the Cable/DSL port to the LAN port, and
reconnect one of your computers to one of the Gateway LAN ports.
6 Re-apply power to the Gateway, 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.
7 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
Infrastructure mode and not Ad Hoc mode. The Gateway contains an
Access Point that is designed to operate in Infrastructure mode. Ad
Hoc mode is not supported by the Gateway.
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CHAPTER 6: TROUBLESHOOTING
■
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 Gateway Wireless LED, it should be lit if
wireless is enabled and will flash when there is wireless activity. If not
lit go to “Wireless Settings” on page 47 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 Gateway. 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 Gateway. The
Gateway can simultaneously support WPA and WEP encryption, but
can only support one configuration of each.
■
Ensure that you have the Wireless computer enabled in the list of
allowed MAC addresses if you are using Wireless Connection control
on the Gateway.
■
If you are having difficulty connecting or are operating at a low speed
try changing the antenna positions on the rear of the Gateway. For
more effective coverage you can try reorientating your antennae.
Place one antenna vertically and one horizontally to improve coverage.
Additionally consider moving the wireless computer closer to the
Gateway 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 Gateway, or trying a
different channel on the Gateway.
■
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
Gateway 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 Gateway to establish
whether this problem exists.
■
Most wireless computer Adapters will scan the channels for the
wireless Gateway. If a wireless computer has not located the Gateway
then try initiating a search manually if the client software supports this
feature or manually set the channel on your wireless computer to
Power LED or Power Adapter OK LED Not Lit
87
correspond to the Gateway channel number. Please refer to your
Wireless computer adapter documentation and vendor to do this.
Power LED or
Power Adapter OK
LED Not Lit
■
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 Gateway the better the
speed. If you are not achieving the speed you had anticipated then try
moving the antenna on the Gateway or moving the Wireless
computer closer to the Gateway. In an ideal network the Gateway
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.
■
Check that your Gateway is receiving power by looking at the status
of the Power LED on the front panel and the Power Adapter OK LED
on the rear panel:
■
■
■
■
Replacement Power
Adapters
If both LEDs are lit green then the unit is receiving power.
If both LEDs are unlit then no power is being supplied to the unit.
Check that the power adapter is plugged into a working mains
outlet and that the mains outlet is supplying power. If the mains
socket is supplying power then the power adapter or power
adapter connection may be faulty. See “Replacement Power
Adapters” below.
If the Power Adapter OK LED is lit but the Power LED is unlit then
there may be a fault with your unit. Contact 3Com Technical
Support.
Check that you are using the correct power adapter for your Gateway.
You should only use the power adapter supplied with your Gateway.
If both the Power Adapter OK LED and Power LED are off, check your
power adapter connection. If the mains outlet is working and is capable
of supplying power to other devices, contact 3Com Technical Support
and ask for a replacement power adapter. Please quote the power
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CHAPTER 6: TROUBLESHOOTING
adapter part number shown on the OfficeConnect power adapter you
are using.
Alternatively, quote the part number for your region:
Table 3 Power Adapter Part Numbers
Alert LED
Part Number
Region
3C16740A
US and Canada
3C16741A
UK
3C16742A
Europe and Middle East
3C16743A
Japan
3C16744A
Australasia (except Japan and Korea)
3C16745A
South Africa
3C16747A
Korea
3C16748A
Argentina
The Alert LED will flash when the Gateway unit is first powered up while
the system software checks the hardware for proper operation. Once the
Gateway has started normal operation, the Alert LED will go out.
■
If the Alert LED does not go out following start up, but illuminates
continuously, this indicates that the software has detected a possible
fault with the hardware. Remove power from the Gateway, wait 10
seconds and then re-apply power. If the Alert LED comes on
continuously again, then a fault has been detected. Locate the copy of
the Gateway software on the accompanying CD-ROM or 3Com web
site (http://www.3com.com) and upload it to the Gateway to see if
this clears the fault (refer to “Recovering from Corrupted Software”
below). If this does not fix the problem, contact your supplier for
further advice.
■
During normal operation, you may notice the Alert LED lighting briefly
from time to time. This indicates that the Gateway has detected a
hacker attack from the Internet and has prevented it from harming
your network. You need take no specific action on this, unless you
decide that these attacks are happening frequently in which case you
may wish to discuss this with your ISP. The Gateway logs such attacks,
and this information is available through the Status and Logs screens.
Recovering from Corrupted Software
Recovering from
Corrupted Software
89
If the Alert LED remains permanently on following power-up, it is possible
that the system software has become corrupted. In this condition, the
Gateway will enter a “recovery” state; DHCP is disabled, 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 Gateway unit in this state.
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 Gateway and disconnect the Cable/DSL modem
and all your computers, except for the one computer with the software
image.
2 You will need to reconfigure this computer with the following static IP
address information:
■
IP address: 192.168.1.2
■
Subnet mask: 255.255.255.0
■
Default Gateway address: 192.168.1.1
3 Restart the computer, and re-apply power to the Gateway.
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 Microcode Recovery utility in the Gateway.
5 Follow the on-screen instructions. Enter the path and filename of the
software image file.
6 When the upload has completed, the Gateway will restart, run the
self-test and, if successful, resume normal operation. The Alert LED will
go out.
7 Refer to the Installation Guide to reconnect your Gateway to the
Cable/DSL modem and the computers in your network. Do not forget to
reconfigure the computer you used for the software upload.
If the Gateway does not resume normal operation following the upload,
it may be faulty. Contact your supplier for advice.
90
CHAPTER 6: TROUBLESHOOTING
Frequently Asked
Questions
How do I reset the Gateway to Factory Defaults?
See “Forgotten Password and Reset to Factory Defaults” on
page 85.
How many computers on the LAN does the Gateway support?
A maximum of 253 computers on the LAN are supported.
How many wireless clients does the Wireless Cable/DSL Gateway
support?
A maximum of 128 wireless clients are supported.
There are only 4 LAN ports on the Gateway. 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 Gateway. 3Com wireless access points and OfficeConnect
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 Gateway support virtual private networks (VPNs)?
The Gateway 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 Gateway?
Updates to the Gateway software are posted on the 3Com support
web site, accessible by visiting:
http://www.3com.com
What other online resources are there?
The 3Com Knowledgebase at:
http://knowledgebase.3com.com
Frequently Asked Questions
91
is a database of technical information covering all 3Com products.
It is updated daily with information from 3Com technical support
services, and it is available 24 hours a day, 7 days a week.
92
CHAPTER 6: TROUBLESHOOTING
A
Running the
Discovery
Application
USING DISCOVERY
3Com provides a user friendly Discovery application for detecting the
Gateway on the network.
Windows Installation
(95/98/2000/Me/NT)
1 Insert the Gateway CD-ROM in the CD-ROM drive on your computer. A
menu will appear; select Gateway Discovery.
Discovery will find the Gateway even if it is unconfigured or
misconfigured.
Figure 66 Discovery Welcome Screen
2 When the Welcome screen is displayed click on Next and wait until the
application discovers the Gateways connected to your LAN.
94
APPENDIX A: USING DISCOVERY
Figure 67 Discovered Gateway Screen
3 Figure 68 shows an example Discovered Devices screen. Highlight the
Wireless Cable/DSL Gateway by clicking on it, and press Next.
Figure 68 Discovery Finish Screen
4 Click on Finish to launch a web browser and display the login page for
the Gateway.
B
IP ADDRESSING
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
Gateway over the
Network
To manage a device over the network, the Gateway must be correctly
configured with the following IP information:
IP Addresses and
Subnet Masks
■
An IP address
■
A Subnet Mask
Each device on your network must have a unique IP address to operate
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.
96
APPENDIX B: 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
Gateway, you will probably only encounter two types of IP Address and
subnet mask structures.
Type One
In a small network, the IP address of ‘192.168.100.8’ is split into two
parts:
■
Part one (‘192.168.100’) identifies the network on which the device
resides.
■
Part two (‘.8’) identifies the device within the network.
This type of IP Address operates on a subnet mask of ‘255.255.255.0’.
See Table 4 for an example about how a network with three computers
and a Gateway might be configured.
Table 4 IP Addressing and Subnet Masking
Device
IP Address
Subnet Mask
PC 1
192.168.100.8
255.255.255.0
PC 2
192.168.100.33
255.255.255.0
PC 3
192.168.100.188
255.255.255.0
Gateway
192.168.100.72
255.255.255.0
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.
How does a Device Obtain an IP Address and Subnet Mask?
97
This type of IP Address operates on a subnet mask of ‘255.255.0.0’.
See Table 5 for an example about how a network (only four computers
represented) and a Gateway might be configured.
Table 5 IP Addressing and Subnet Masking
How does a Device
Obtain an IP
Address and Subnet
Mask?
DHCP Addressing
Device
IP Address
Subnet Mask
PC 1
192.168.100.8
255.255.0.0
PC 2
192.168.201.30
255.255.0.0
PC 3
192.168.113.155
255.255.0.0
PC 4
192.168.002.230
255.255.0.0
Gateway
192.168.002.72
255.255.0.0
There are three different ways to obtain an IP address and the subnet
mask. These are:
■
Dynamic Host Configuration Protocol (DHCP) Addressing
■
Static Addressing
■
Automatic Addressing (Auto-IP Addressing)
The Gateway 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
Auto-IP 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.
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
98
APPENDIX B: 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.
C
TECHNICAL SPECIFICATIONS
This section lists the technical specifications for the OfficeConnect
Wireless 11g Cable/DSL Gateway.
Wireless 11g
Cable/DSL Gateway
Interfaces
Cable/DSL modem connection — 10Mbps/100Mbps dual speed Ethernet
port (10BASE-T/100BASE-TX)
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, OFDM
100
APPENDIX C: TECHNICAL SPECIFICATIONS
Encryption: 40/64 bit WEP, 128 bit WEP, WPA
Maximum clients: 128
O/P Power 18dBm
Operating Temperature
0 °C to 40 °C (32 °F to 105 °F)
Power
7VA, 23.9 BThU/hr
Humidity
0 % to 90 % (non-condensing) humidity
Dimensions
■
Width = 220 mm (8.7 in.)
■
Depth = 135 mm (5.3 in.)
■
Height = 24 mm (1 in.)
Weight
Approximately 500 g (1.1 lbs)
Standards
Functional:
ISO 8802/3
IEEE 802.3
IEEE 802.11b, 802.11g, Wi-Fi
Safety:
UL60950
CSA 22.2 #60950
IEC 60950
EN 60950
EMC:
EN 55022 Class B
EN 55024
CISPR 22
FCC Part 15 Class B*
ICES-003 Class B
CNS 13438 Class A
ETSI EN 301 489–17
Radio
CFR 47 FCC Part 15.207, 15.209, 15.247 and 15.249.
ETS 300 328 (2.4 GHz ISM band wide band transmission
101
systems.
RSS-210
Environmental: EN 60068 (IEC 68)
*See “FCC Statement” on page 121 for conditions of operation.
System Requirements
Operating Systems
The Gateway 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 Gateway complies to the IEEE 802.3i, u and x specifications.
Wireless Performance
The Gateway has been designed to conform to the Wi-Fi interoperability
test standard.
Cable Specifications
The Gateway 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).
102
APPENDIX C: TECHNICAL SPECIFICATIONS
D
SAFETY INFORMATION
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 Gateway 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: Only stack the Gateway with other OfficeConnect units.
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 Gateway. If you have a physical problem with the unit
that cannot be solved with problem solving actions in this guide,
contact your supplier.
104
APPENDIX D: SAFETY INFORMATION
WARNING: Disconnect the power adapter before moving the unit.
WARNING: RJ-45 ports. These are shielded RJ-45 data sockets. They
cannot be used as telephone sockets. Only connect RJ-45 data
connectors to these sockets.
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 Gateway 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.
VORTSICHT: Stapeln Sie das Geräts nur mit anderen OfficeConnect
Gerätes zusammen.
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.
105
VORSICHT: Es sind keine von dem Benutzer zu ersetzende oder zu
wartende Teile in dem Gerät vorhanden. Wenn Sie ein Problem mit
dem Gateway 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 Gateway 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: Seulement entasser le moyer avec les autres moyeux
OfficeConnects.
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.
106
APPENDIX D: SAFETY INFORMATION
AVERTISSEMENT: L’appareil fonctionne à une tension extrêmement
basse de sécurité qui est conforme à la norme CEI 60950. Ces
conditions ne sont maintenues que si l'équipement auquel il est
raccordé fonctionne dans les mêmes conditions.
AVERTISSEMENT: Il n’y a pas de parties remplaceables par les
utilisateurs ou entretenues par les utilisateurs à l’intérieur du moyeu. Si
vous avez un problème physique avec le moyeu qui ne peut pas être
résolu avec les actions de la résolution des problèmes dans ce guide,
contacter votre fournisseur.
AVERTISSEMENT: Débranchez l'adaptateur électrique avant de retirer
cet appareil.
AVERTISSEMENT: Ports RJ-45. Il s'agit de prises femelles blindées de
données RJ-45. Vous ne pouvez pas les utiliser comme prise de
téléphone. Branchez uniquement des connecteurs de données RJ-45 sur
ces prises femelles.
E
END USER SOFTWARE LICENSE
AGREEMENT
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END USER SOFTWARE LICENSE AGREEMENT
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APPENDIX E: END USER SOFTWARE LICENSE AGREEMENT
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F
Information
Regarding Popular
ISPs
ISP INFORMATION
WAN Types
Characteristics
Popular ISPs
Dynamic IP
Cable modem ISP, non-hostname
based. Need to clone the MAC
address in the Advanced tab of
the Internet Settings page.
MediaOne, RoadRunner,
Optimum Online, Time Warner,
Charter, Adelphia, Metrocast.
(Clone MAC)
Dynamic IP
(Hostname)
PPPoE
(DSL)
PPTP
Cable ISP, Requires Hostname to @Home Network, Cogoco,
authenticate ie. cx213818-B.
ComCast, Cox, Excite, Rogers,
Need to enter the hostname in the Shaw, Insight, Videotron
Internet Settings page.
Usually special software installed
on PC, MacPOET/WinPOET,
EnterNet 300. The Gateway has
this software built in and you can
remove it from your PC. You will
need to enter the user name and
password that your ISP provided
to you in the PPPoE page of the
Gateway. Leave the service name
blank unless your ISP requires it.
Bell*, Century Tel, Citizens,
Primus, Prodigy, Snet, Sprint FC,
Verizon, First World, Brightnet,
Earthlink, Ameritech, Covad,
Mindspring, Sympatico DSL,
USwest, Owest, SNet
Cable or DSL, always on. Some
European ISPs require a PPTP
tunnel to authenticate their
network.
KPN (Netherlands), Austria
Telecom
110
APPENDIX F: ISP INFORMATION
Static
(DSL)
Static
(Cable)
DSL Modem, always on. Need to
enter ALL IP information from ISP
in the Static IP address section of
the Internet Settings page.
CableSpeed, Cnet, Direct Link,
Drizzle, DSL Extreme, Earthlink
Wireless, Fast Point, Flashcom,
GTE-WhirlWind, Heavenet, HSA
Corp, I-55, InterAccess, LinkLine,
Mission, Nauticom, NAS, Omitel,
Onterra, Phatpipe, Rhythms,
Speakeasy, Sterling, XO, Zyan
Cable Modem, Always on, ISP
Cox Cable, Sprint, US Cable,
assigns specific IP information
Cable-Cable
which needs to be entered on the
“Fixed IP” page of the Gateway.
*Bell includes Bell Advantage, Bell Canada, Bell South, PacBell and
Southwestern Bell.
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 gateway uses. (see also Infrastructure mode.)
Auto-negotiation
Some devices in the OfficeConnect range support auto-negotiation.
Auto-negotiation is where two devices sharing a link, automatically
112
GLOSSARY
configure to use the best common speed. The order of preference (best
first) is: 100BASE-TX full duplex, 100BASE-TX half duplex, 10BASE-T full
duplex, and 10BASE-T half duplex. Auto-negotiation is defined in the IEEE
802.3 standard for Ethernet and is an operation that takes place in a few
milliseconds.
Bandwidth
The information capacity, measured in bits per second, that a channel can
transmit. The bandwidth of Ethernet is 10 Mbps, the bandwidth of Fast
Ethernet is 100 Mbps. The bandwidth for 802.11b wireless is 11Mbps.
Category 3 Cables
One of five grades of Twisted Pair (TP) cabling defined by the EIA/TIA-586
standard. Category 3 is voice grade cable and can only be used in
Ethernet networks (10BASE-T) to transmit data at speeds of up to 10
Mbps.
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 OfficeConnect Wireless Cable/DSL
gateway 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 Gateway 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
GLOSSARY
113
IP addresses (such as 192.34.45.8). A DNS server keeps a database of
host computers and their respective domain names and IP addresses, so
that when a domain name is requested (as in typing “3com.com” into
your Internet browser), the user is sent to the proper IP address. The DNS
server address used by the computers on your home network is the
location of the DNS server your ISP has assigned.
DSL modem
Encryption
ESSID
Ethernet
Ethernet Address
Fast Ethernet
DSL stands for digital subscriber line. A DSL modem uses your existing
phone lines to send and receive data at high speeds.
A method for providing a level of security to wireless data transmissions.
The OfficeConnect Cable/DSL Gateway and Wireless Cable/DSL Gateway
uses two levels of encryption; 40/64 bit and 128 bit. 128 bit is a more
powerful level of encryption than 40/64 bit.
Extended Service Set Identifier. The ESSID is a unique identifier for your
wireless network. You must have the same ESSID entered into the
gateway and each of it's wireless clients.
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.
See MAC address.
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.
Gateway
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.
Half Duplex
A system that allows packets to transmitted and received, but not at the
same time. Contrast with full duplex.
114
GLOSSARY
Hub
A device that regenerates LAN traffic so that the transmission distance of
that signal can be extended. Hubs are similar to repeaters, in that they
connect LANs of the same type; however they connect more LANs than a
repeater and are generally more sophisticated.
IEEE
Institute of Electrical and Electronics Engineers. This American
organization was founded in 1963 and sets standards for computers and
communications.
IETF
Internet Engineering Task Force. An organization responsible for
providing engineering solutions for TCP/IP networks. In the network
management area, this group is responsible for the development of the
SNMP protocol.
Infrastructure mode
Infrastructure mode is the wireless configuration supported by the
Gateway. 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 Gateway. (see also Ad Hoc mode)
IP
IP Address
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.
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).
GLOSSARY
115
MAC
Media Access Control. A protocol specified by the IEEE for determining
which devices have access to a network at any one time.
MAC Address
Media Access Control Address. Also called the hardware or physical
address. A layer 2 address associated with a particular network device.
Most devices that connect to a LAN have a MAC address assigned to
them as they are used to identify other devices in a network. MAC
addresses are 6 bytes long.
NAT
Network
Network Interface
Card (NIC)
Protocol
Network Address Translation. NAT enables all the computers on your
network to share one IP address. The NAT capability of the Gateway
allows you to access the Internet from any computer on your home
network without having to purchase more IP addresses from your ISP.
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.
A circuit board installed into a piece of computing equipment, for
example, a computer, that enables you to connect it to the network. A
NIC is also known as an adapter or adapter card.
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”.
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.
116
GLOSSARY
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
play
Universal plug and play is a system which allows compatible applications
to read some of their settings from the Gateway. This allows them to
automatically configure some, or all, of their settings and need less user
configuration.
URL Filter
A URL Filter is a feature of a firewall that allows it to stop its clients form
browsing inappropriate Web sites.
GLOSSARY
117
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
Wireless LAN Service
Area
Wizard
WLAN
WPA
The term used to describe a desktop or mobile PC that is wirelessly
connected to your wireless network
Another term for ESSID (Extended Service Set Identifier)
A Windows application that automates a procedure such as installation
or configuration.
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).
Wi-Fi Protected Access. A dynamically changing encryption mechanism
for wireless networking. Encryption strength is 256 bit.
118
GLOSSARY
INDEX
A
Access Rights 69
Addresses
IP 95
Administration Password 32, 43
Automatic Addressing 97
C
Cable Specifications 101
Channels 121
Clone MAC address 60
Configuration
backup 77
restore 77
Conventions
notice icons, About This Guide 8
text, About This Guide 8
Country Selection 30
D
DHCP 35, 38, 45, 97
DHCP Server 27
Discovery Application 93
DMZ 63
DNS 26, 36, 37, 60, 61, 63
primary 36, 37, 59
secondary 36, 37, 59
Dynamic 57
Dynamic IP Address 35, 57, 63
F
Firewall 63
Forgotten Password 85
G
Gateway 13
I
Internet
addresses 95
Internet Addressing Mode 33
Internet Settings 57
dynamic IP address 57
PPPoE 57
PPTP 57
static IP address 57
IP Address 21, 36, 38, 45, 95
IP Allocation 58
ISP Connection 58
ISP Gateway Address 36
L
LAN 38, 44
LED 14
Login 94
Logs 80
M
MAC Address 35, 46
deleting 54
modifying 54
N
Network
addresses 95
Networking
wireless 85
NIC
wireless 14
P
Password 29, 43
PC Privileges 67
PING 73
PPPoE 21, 28, 34, 57, 61
PPTP 21, 57, 62
Profile 55
120
INDEX
R
Remote Administration 74
Reset to Factory Defaults 77, 85
Restart 75
S
Safety Information 19
Security 73
Setup Wizard 29, 44
Special Applications 65
Specifications
technical 99
Static Addressing 97
Static IP Address 57, 59
Status 79
Subnet Mask 36, 38, 95
Summary 40
Support Information 80
Support Links 81
T
TCP/IP 25, 27, 38, 95
Technical
specifications 99
standards 99
Time Zone 32, 76
U
Unit Configuration 44
Upgrade 78
URL Filter 69
V
Virtual Servers 63, 64
W
WAN 33
Web Proxy 28
Wireless
authorized PCs 53
channel selection 47
client list 55
configuration 47
connection control 53
encryption 49
LED 15
networking 85
NIC 14
service area name 48
settings 39, 47
REGULATORY NOTICES FOR THE
WIRELESS 11G CABLE/DSL
GATEWAY
Channels
Use of the Wireless Cable/DSL Gateway 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, 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
Argentina, Brazil, Canada, Columbia, Mexico, Taiwan, United States
10 - 13
France*, Jordan
5-7
Israel
1-14
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
122
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation.
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:
3CRWE554G72
Description:
Wireless 11g Cable/DSL Gateway
to which this declaration relates, is in conformity with the following
standards or other normative documents:
■
ANSI C63.4-1992 Methods of Measurement
123
■
Federal Communications Commission 47 CFR Part 15, subpart B
15.107 (a)Class B Conducted Limits
15.109 (a)Class B Radiated Emissions Limits
■
15.107 (e)Class B Conducted Limits
15.109 (g)Class B Radiated Emissions Limits
Exposure to Radio Frequency Radiation: The radiated output power of the
3Com OfficeConnect Wireless Cable/DSL Gateway is far below the FCC
radio frequency exposure limits. Nevertheless, the 3Com OfficeConnect
Wireless Cable/DSL Gateway 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.
CSA Statement
This Class B digital apparatus meets all requirements of the Canadian
Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du
Règlement sur le matériel brouilleur du Canada.
BSMI Statement
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.
124
RF Exposure
Compliance
Statement (U.S.)
CAUTION: The 3Com OfficeConnect Wireless Cable/DSL Gateway 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
OfficeConnect Wireless Cable/DSL Gateway 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.
Potential RF
Interference
(Canada)
CAUTION: To prevent radio interference to the licensed service, this
device is intended to be operated indoors and away from windows to
provide maximum shielding. Equipment (or it's transmit antenna) that is
installed outdoors is subject to licensing.
3Com Corporation, Corporate Headquarters,
Copyright © 2003 3Com Corporation. All rights reserved.
5500 Great America Parkway, Santa Clara,
3Com and OfficeConnect are registered trademarks of
CA 95052-8145, USA.
3Com Corporation. All other company and product names
may be trademarks of their respective companies.
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.
DUA0055-4AAA01
Rev. 01