3COM 3CR858-91 User Manual

OfficeConnect® Cable/DSL Router
User Guide

3CR858-91

http://www.3com.com/

Part No. DUA8589-1AAA01

Rev. 01

Published July 2004

3Com Corporation
350 Campus Drive,
Marlborough, MA
USA 01752-3064

Copyright © 2004, 3Com Corporation. All rights reserved. No part of this documentation may be reproduced
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CONTENTS

ABOUT THIS GUIDE

Naming Convention 7
Conventions 8

Feedback about this User Guide 8
Related Documentation 9

1 INTRODUCING THE ROUTER

OfficeConnect Cable/DSL Router 11
Router Advantages 13
Package Contents 13
Minimum System and Component Requirements 14
Front Panel 14
Rear Panel 16

2 HARDWARE INSTALLATION

Introduction 17

Safety Information 17

Positioning the Router 17

Using the Rubber Feet 18
Wall Mounting 18
Connecting the Router 18

3 SETTING UP YOUR COMPUTERS

Obtaining an IP Address Automatically 21

Windows 2000 21

Windows XP 23

Windows 95/98/ME 23

Macintosh 23
Disabling PPPoE and PPTP Client Software 24

Disabling Web Proxy 24

4 RUNNING THE SETUP WIZARD

Accessing the Wizard 25

Password 27
Time Zone 28
Connection Type 29
DNS 35
Hostname and MAC Address 36
LAN Settings 37
Configuration Summary 38

5 ROUTER CONFIGURATION

Navigating Through the Router Configuration Pages 39

Main Menu 39
LAN Settings 40
Internet Settings 42

Connection to ISP 43

DNS 49

Hostname & MAC 50
Firewall 50

SPI 51

Special Applications 54

Virtual Servers 56

Client IP Filters 57

MAC Address Filtering 62

DMZ 63
VPN 64

Adding an IPSec Connection 67

Adding an L2TP over IPSec Connection 68

Adding a PPTP Connection 70
SNMP 71
System Tools 72

Restart Router 73

Reset to Factory Defaults 73

Backup/Restore Settings 74

Upgrade 75

Admin Password 76
Time Zone 77

Advanced 79

NAT 79
Universal Plug and Play 80
WAN Ping Blocking 81
Remote Administration 81
Routing 82
DDNS 86

Status and Logs 87

Status 87
Traffic Metering 88
Logs 88

Support/Feedback 89

Support 89
Feedback 90

6 TROUBLESHOOTING

Basic Connection Checks 91
Browsing to the Router Configuration Screens 91
Connecting to the Internet 92
Forgotten Password and Reset to Factory Defaults 93
Alert LED 93
Power LED or Power Adapter OK LED Not Lit 94

Replacement Power Adapters 94
Recovering from Corrupted Software 95
Frequently Asked Questions 96

A IP ADDRESSING

The Internet Protocol Suite 99
Managing the Router over the Network 99

IP Addresses and Subnet Masks 99
How does a Device Obtain an IP Address and Subnet Mask? 101

DHCP Addressing 101

Static Addressing 101

Auto-IP Addressing 101

B ISP INFORMATION

C TECHNICAL SPECIFICATIONS

OfficeConnect Cable/DSL Router 105

Standards 105

D SAFETY INFORMATION

E OBTAINING SUPPORT FOR YOUR PRODUCT

Register Your Product to Gain Service Benefits 111
Purchase Value-Added Services 111
Troubleshoot Online 111
Access Software Downloads 112
Contact Us 112
Telephone Technical Support and Repair 112

F END USER SOFTWARE LICENSE AGREEMENT

GLOSSARY

REGULATORY NOTICES

INDEX

ABOUT THIS GUIDE

This guide describes how to install and configure the OfficeConnect
Cable/DSL Router (3CR858-91).

This guide is intended for use by those responsible for installing and
setting up network equipment; consequently, it assumes a basic working
knowledge of LANs (Local Area Networks) and Internet Routers.

If a release note is shipped with the Cable/DSL Router and contains
information that differs from the information in this guide, follow the
information in the release note.

Most user guides and release notes are available in Adobe Acrobat
Reader Portable Document Format (PDF) on the 3Com World Wide Web
site:

http://www.3com.com

Naming Convention Throughout this guide, the OfficeConnect Cable/DSL Router is referred to

as the “Router”.

Category 3 and Category 5 Twisted Pair Cables are referred to as Twisted
Pair Cables throughout this guide.

8 ABOUT THIS GUIDE

Conventions Ta bl e 1 and Tab l e 2 list conventions that are used throughout this guide.

Tab le 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.

Tab le 2 Text Conventions

Convention Description

The words “enter”
and “type”

When you see the word “enter” in this guide, you must type
something, and then press Return or Enter. Do not press
Return or Enter when an instruction simply says “type.”

Keyboard key names If you must press two or more keys simultaneously, the key

names are linked with a plus sign (+). Example:

Press Ctrl+Alt+Del

Words in italics Italics are used to:

■ Emphasize a point.

■ Denote a new term at the place where it is defined in the

text.

■ Identify menu names, menu commands, and software

button names. Examples:

From the Help menu, select Contents.

Click OK.

Feedback about this

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:

[e-mail]

Please include the following information when commenting:

■ Document title

■ Document part number (on the title page)

■ Page number (if appropriate)

Conventions 9

Example:

■ OfficeConnect Cable/DSL Router User Guide

■ Part Number DUA8589-1AAA01

■ Page 24

Do not use this e-mail address for technical support questions. For
information about contacting Technical Support, please refer to

Appendix E

“Obtaining Support for your Product”.

Related

Documentation

In addition to this guide, each Router document set includes one
Installation Guide. This guide contains the instructions you need to install
and configure your Router.

10 ABOUT THIS GUIDE

1

INTRODUCING THE ROUTER

Welcome to the world of networking with 3Com®. In the modern
business environment, communication and sharing information is crucial.
Computer networks have proved to be one of the fastest modes of
communication but, until recently, only large businesses could afford the
networking advantage.

OfficeConnect Cable/DSL Router

The OfficeConnect Cable/DSL Router is designed to provide a
cost-effective means of sharing a single broadband Internet connection
amongst several computers. The Router also includes an electronic
“firewall” that protects your network using Stateful Packet Inspection
(SPI) to detect intruders and prevent them from seeing your files or
damaging your computers. The Router can also prevent your users from
accessing Web sites which you find unsuitable. This completely equipped,
Cable/DSL Router also features Virtual Private Network (VPN) initiation
and termination, allowing encrypted links to other private networks.

The example in Figure 1
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.

shows a network without a Router where only

12 CHAPTER 1: INTRODUCING THE ROUTER

Figure 1 Example Network Without a Router

When you use the Router in your network (Figure 2), it becomes your
connection to the Internet. Connections can be made directly to the
Router, or to an OfficeConnect Switch or Hub, expanding the number of
computers you can have in your network.

Figure 2 Example Network Using a Cable/DSL Router

Router Advantages The advantages of the Router include:

■ Shared Internet connection for wired computers. The Cable/DSL

Router also provides shared internet connection

■ No need for a dedicated, “always on” computer serving as your

Internet connection

■ Cross-platform operation for compatibility with Windows, Unix and

Macintosh computers

■ Easy-to-use, Web-based setup and configuration

■ Provides centralization of all network address settings (DHCP)

■ Acts as a Virtual server to enable remote access to Web, FTP, and other

services on your network

■ Security - Firewall protection against Internet hacker attacks and

encryption to protect network traffic

Package Contents The Router kit includes the following items:

Router Advantages 13

■ One OfficeConnect Cable/DSL Router

■ One power adapter for use with the Router

■ Four rubber feet

■ One Ethernet cable

■ One CD-ROM containing the Router Discovery program and this User

Guide

■ Installation Guide

■ One Support and Safety Information Sheet

■ One Warranty Flyer

If any of these items are missing or damaged, please contact your retailer.

14 CHAPTER 1: INTRODUCING THE ROUTER

Minimum System and Component Requirements

Your Router requires that the computer(s) and components in your
network be configured with at least the following:

■ A computer with an operating system that supports TCP/IP

networking protocols (for example Windows 95/98/NT/Me/2000/XP,
Unix, Mac OS 8.5 or higher).

■ An Ethernet 10Mbps or 10/100 Mbps NIC for each computer to be

connected to the four-port switch on your Router.

■ A cable or DSL broadband connection to the Internet, with a suitable

modem. The modem must have an Ethernet port for connection to
your Router.

■ A Web browser that supports JavaScript, such as Netscape 4.7 or

higher, Internet Explorer 5.0 or higher, or Mozilla 1.2.1 or higher.

Front Panel The front panel of the Router contains a series of indicator lights (LEDs)

that help describe the state of various networking and connection
operations.

Figure 3 Router - Front Panel

231 4

1 Alert LED

Orange

Indicates a number of different conditions, as described below.

Off - The Router is operating normally.

Flashing quickly - Indicates one of the following conditions:

■ The Router has just been started up and is running a self-test routine,

or

■ The administrator has invoked the Reset to Factory Defaults

command, or

■ The system software is in the process of being upgraded

Front Panel 15

In each of these cases, wait until the Router has completed the current
operation and the alert LED is Off.

Flashing slowly - The Router has completed the Reset to Factory Defaults
process, and is waiting for you to reset the unit. To do this, remove
power, wait 10 seconds and then re-apply power. The Router will then
enter the start-up sequence and resume normal operation.

If you have used a cable to reset the unit to Factory Defaults, refer to

“Forgotten Password and Reset to Factory Defaults”

on page 93.

On for 2 seconds, and then off - The Router has detected and prevented

a hacker from attacking your network from the Internet.

Continuously on - A fault has been detected with your Router during the
start-up process. Refer to Chapter 6

“Troubleshooting”.

2Power LED

Green

Indicates that the Router is powered on.

3 Four LAN Status LEDs

Green (100Mbps link) / yellow (10Mbps link)

If the LED is on, the link between the port and the next piece of network
equipment is OK. If the LED is flashing, the link is OK and data is being
transmitted or received. If the LED is off, nothing is connected, the
connected device is switched off, or there is a problem with the
connection (refer to Chapter 6

“Troubleshooting”). The port will

automatically adjust to the correct speed and duplex.

4 Cable/DSL Status LED

Green (100Mbps link) / yellow (10Mbps link)

If the LED is on, the link between the Router and the cable or DSL modem
is OK. If the LED is flashing, the link is OK and data is being transmitted or
received. If the LED is off, nothing is connected, the modem is switched
off or there is a problem (refer to Chapter 6

“Troubleshooting”).

16 CHAPTER 1: INTRODUCING THE ROUTER

Rear Panel The rear panel (Figure 4) of the Router contains four LAN ports, one

Ethernet Cabler/DSL port, and a power adapter socket.

Figure 4 Router - Rear Panel

675 8

5 Power Adapter Socket

Only use the power adapter supplied with this Router. Do not use any
other adapter.

6 Ethernet Cable/DSL port

Use the supplied patch cable to connect the Router to the Ethernet port
on your cable or DSL modem. The port will automatically adjust to the
correct speed and duplex.

7 Four 10/100 LAN ports

Using suitable RJ-45 cable, you can connect your Router to a computer,
or to any other piece of equipment that has an Ethernet connection (for
example, a hub or a switch). The LAN ports are configured as MDIX, for
connection to a computer with a straight through RJ-45 cable.

8 Power Adapter OK LED

Green

Indicates that the power adapter is supplying power to the Router. If the
LED is off, there may be a problem with the power adapter or adapter
cable.

HARDWARE INSTALLATION

2

Introduction This chapter will guide you through a basic installation of the Router,

including:

■ “Positioning the Router”.

■ “Connecting the Router”.

Safety Information

Positioning the Router

WARNING: Please read the “Safety Information”
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.

You should place the Router in a location that:

■ is conveniently located for connection to the telephone socket.

■ allows convenient connection to the computers that will be connected

to the four LAN ports on the rear panel, if desired.

■ allows easy viewing of the front panel LED indicator lights, and access

to the rear panel connectors, if necessary.

When positioning your Router, ensure:

■ It is out of direct sunlight and away from sources of heat.

■ Cabling is away from power lines, fluorescent lighting fixtures, and

sources of electrical noise such as radios, transmitters and broadband

amplifiers.

section in Appendix D

18 CHAPTER 2: HARDWARE INSTALLATION

■ Water or moisture cannot enter the case of the unit.

■ Air flow around the unit and through the vents in the side of the case

is not restricted. 3Com recommends you provide a minimum of
25 mm (1 in.) clearance.

Using the Rubber

Feet

Use the four self-adhesive rubber feet to prevent your Router from
moving around on your desk or when stacking with flat top units. Only
stick the feet to the marked areas at each corner of the underside of your
Router.

Wall Mounting There are two slots on the underside of the Router that can be used for

wall mounting.

When wall mounting the unit, ensure that it is within reach of the power
outlet.

You will need two suitable screws to wall mount the unit. To do this:

1 Ensure that the wall you use is smooth, flat, dry and sturdy and make two

screw holes which are 150 mm (5.9 in.) apart.

2 Fix the screws into the wall, leaving their heads 3 mm (0.12 in.) clear of

the wall surface.

3 Remove any connections to the unit and locate it over the screw heads.

When in line, gently push the unit on to the wall and move it downwards
to secure.

When making connections, be careful not to push the unit up and off the
wall.

Connecting the Router

CAUTION: Only wall mount single units, do not wall mount stacked
units.

To power up your Router, and then connect it to your modem and to a
computer, do the following:

1 Plug the power adapter into the power adapter socket located on the

back panel of the Router.

2 Plug the power adapter into a standard electrical wall socket. Wait for the

Alert LED to stop flashing.

Connecting the Router 19

3 Ensure that your modem and computer are both switched on.

4 Use the supplied cable to connect the Router’s Ethernet Cable/DSL port to

the modem. Check that the Cable/DSL Status LED lights.

5 Connect your computer to one of the 10/100 LAN ports on the Router.

Check that the LAN Status LED for the port lights green.

See Figure 5

for an example configuration.

Figure 5 Connecting the Router

Alert

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20 CHAPTER 2: HARDWARE INSTALLATION

3

SETTING UP YOUR COMPUTERS

The Router has the ability to dynamically allocate network addresses to
the computers on your network, using DHCP. However, your computers
need to be configured correctly for this to take place. To change the
configuration of your computers to allow this, follow the instructions in
this chapter.

Obtaining an IP Address Automatically

Windows 2000 If you are using a Windows 2000-based computer, use the following

Follow the instructions for your particular operating system to ensure that
your computers are configured to obtain an IP address automatically.

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

TCP/IP and click on Properties.

should be displayed. Select Internet Protocol

22 CHAPTER 3: SETTING UP YOUR COMPUTERS

Figure 6 Local Area Properties Screen

6 Ensure that the options Obtain an IP Address automatically, and Obtain

DNS server address automatically are both selected as shown in Figure 7
Click OK.

.

Figure 7 Internet Protocol (TCP/IP) Properties Screen

7 Restart your computer.

Obtaining an IP Address Automatically 23

Windows XP If you are using a Windows XP computer, use the following procedure to

change your TCP/IP settings:

1 From the Windows Start menu, select Control Panel.

2 Click on Network and Internet Connections.

3 Click on the Network Connections icon.

4 Double click on LAN or High Speed Connection icon. A screen titled Local

Area Connection Status will appear.

5 Select Internet Protocol TCP/IP and click on Properties.

6 Ensure that the options Obtain an IP Address automatically, and Obtain

DNS servers automatically are both selected. Click OK.

7 Restart your computer.

Windows 95/98/ME If you are using a Windows 95/98/ME computer, use the following

procedure to change your TCP/IP settings:

1 From the Windows Start Menu, select Settings > Control Panel.

2 Double click on Network. Select the TCP/IP item for your network card

and click on Properties.

3 In the TCP/IP dialog, select the IP Address tab, and ensure that Obtain IP

address automatically is selected. Click OK.

Macintosh If you are using a Macintosh computer, use the following procedure to

change your TCP/IP settings:

1 From the desktop, select Apple Menu, Control Panels, and TCP/IP.

2 In the TCP/IP control panel, set Connect Via: to “Ethernet”.

3 In the TCP/IP control panel, set Configure: to “Using DHCP Server.”

4 Close the TCP/IP dialog box, and save your changes.

5 Restart your computer.

24 CHAPTER 3: SETTING UP YOUR COMPUTERS

Disabling PPPoE and PPTP Client Software

If you have PPPoE client software installed on your computer, you will
need to disable it. To do this:

1 From the Windows Start menu, select Settings > Control Panel.

2 Double click on Internet Options.

3 Select the Connections Tab. A screen similar to Figure 8

displayed.

4 Select the Never Dial a Connection option.

Figure 8 Internet Properties Screen

should be

Disabling Web Proxy

You may wish to remove the PPPoE client software from your computer
to free resources, as it is not required for use with the Router.

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

RUNNING THE SETUP WIZARD

Accessing the Wizard

The Router setup program is Web-based, which means that it is accessed
through your Web browser (Netscape Navigator or Internet Explorer).

To use the Setup Wizard:

1 Ensure that you have at least one computer connected to the Router.

Refer to Chapter 2

2 Launch your Web browser on the computer.

3 Enter the following URL in the location or address field of your browser:

http://192.168.1.1 (as shown in Figure 9

Figure 9 Web Browser Location Field (Factory Default)

for details on how to do this.

).

26 CHAPTER 4: RUNNING THE SETUP WIZARD

The Login screen displays (Figure 10).

Figure 10 Router Login Screen

4 Log in by typing the administrator password (the default password is

admin) in the System Password field, and clicking Log in.

Be sure to bookmark this screen for easy reference if you should want to
change the Router settings.

The Wizard will attempt to launch automatically, but if it fails, select
Setup Wizard from the main menu.

5 You will be guided step by step through a basic setup procedure,

described in the following sections. At any time, click Next to move to the
next screen, click Back to return to the previous screen, or click Cancel to
exit the Wizard.

Password Figure 11 Admin Password Screen

In the Admin Password screen (Figure 11)

1 Typ e t h e Current Password.

2 Type a new password in both the New Password and Confirm New

Password boxes.

Accessing the Wizard 27

3 Typ e i n a Login Timeout. This is the amount of time you want the Router

to remain inactive before it returns to the login screen.

3Com recommends entering a new password when setting up the Router
for the first time. The Router is shipped from the factory with a default
password, admin.

The Password is case sensitive. Write the new password down and keep it
in a safe place, so that you can change your settings in the future.

4 Click Next to display the Time Zone setup screen (Figure 12

).

28 CHAPTER 4: RUNNING THE SETUP WIZARD

Time Zone Figure 12 Time Zone Screen

The Router keeps time by connecting to a Simple Network Time Protocol
(SNTP) server. This allows the Router to synchronize the system clock to
the Internet. The synchonized clock in the Router is used to record the
security log. To set the time zone for your Router, do the following:

1 Select the Base Date and Base Time. The Router will use these settings if it

is unable to connect to the Internet or SNTP Server.

2 To enable SNTP, check the Using Time Server (NTP) check box.

3 Select a time zone from the Set Time Zone drop down list.

4 Enter the interval, in hours, at which to want the Router to resynchonize

with the SNTP Server, at the Synchonization Interval text box. The default
is every 24 hours.

5 Select a primary SNTP server, and if required a secondary SNTP server

from the appropriate drop down boxes.

6 If you want to enable aylight saving, check the Daylight Savings check

box.

7 Select the month and day that you want daylight savings to begin at Start

Time, and select the month and day that you want daylight davings to
end at End Time.

The Daylight Savings option advances the system clock by one hour
between the dates that you specify in the Start Time and End Time drop

Accessing the Wizard 29

down lists. It does not cause the system clock to be updated for daylight
savings time automatically.

8 Click Next to display the Connection Type screen.

Connection Type

Figure 13 Connection Type Screen

This Connection Type screen allows you to set up the Router 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:

■ Dynamic IP Address — see page 30.

■ PPPoE (typically DSL users only) — see page 31.

■ PPTP (some DSL users in Europe) — see page 32.

■ L2TP (supported by some ISPs) — see page 32.

■ Static IP Address — see page 34.

and click Next.

For further information on selecting a mode see “Internet Settings”

page 42

.

on

30 CHAPTER 4: RUNNING THE SETUP WIZARD

Dynamic IP Address Mode

Figure 14 Dynamic IP Screen

1 Some ISPs require a host name. If your ISP has this requirement, enter the

host name in the Host Name text box .

2 Either:

■ If your ISP requires an assigned MAC address, enter the values for a

MAC address. Or,

■ If the computer you are now using is the one that was previously

connected directly to the cable modem, select Clone.

3 Click Next. The DNS screen displays. Refer to “DNS”

on page 35.