Linksys BEFSR41, BEFSRU31 User Manual

Instant Broadband™ Series

EtherFast

Cable/DSLRouters

Use this User Guide to install the following Linksys product(s):

BEFSR41 ver. 2 EtherFast Cable/DSL Router with 10/100 4-Port Switch BEFSRU31 EtherFast Cable/DSL Router with USB Port and 10/100

3-Port Switch

BEFSR11 ver. 2 EtherFast 1-Port Cable/DSL Router

User Guide

COPYRIGHT & TRADEMARKS Copyright © 2002 Linksys, All Rights Reserved. Instant Broadband is a registered trademark of Linksys. Microsoft, Windows, and the Windows logo are registered trademarks of Microsoft Corporation. All other trademarks and brand names are the property of their respective proprietors.

LIMITED WARRANTY Linksys guarantees that every Instant Broadband EtherFast Cable/DSL Router will be free from physical defects in material and workmanship for one year from the date of purchase, when used within the limits set forth in the Specification section of this User Guide. If the product proves defective during this warranty period, call Linksys Customer Support in order to obtain a Return Authorization number. BE SURE TO HAVE YOUR PROOF OF PURCHASE ON HAND WHEN CALLING. When returning a product, mark the Return Authorization number clearly on the outside of the package and include a copy of your original proof of purchase. RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF PURCHASE. All customers located outside of the United States of America and Canada shall be held responsible for shipping and handling charges.

IN NO EVENT SHALL LINKSYS’ LIABILITY EXCEED THE PRICE PAID FOR THE PRODUCT FROM DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THE PRODUCT, ITS ACCOMPANYING SOFTWARE, OR ITS DOCUMENTATION. LINKSYS OFFERS NO REFUNDS FOR ITS PRODUCTS. Linksys makes no warranty or representation, expressed, implied, or statutory, with respect to its products or the contents or use of this documentation and all accompanying software, and specifically disclaims its quality, performance, merchantability, or fitness for any particular purpose. Linksys reserves the right to revise or update its products, software, or documentation without obligation to notify any individual or entity. Please direct all inquiries to:

Linksys P.O. Box 18558, Irvine, CA 92623. FCC STATEMENT

The Instant Broadband EtherFast Cable/DSL Router has been tested and complies with the specifications for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used according to the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which is found 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 or relocate the receiving antenna

• Increase the separation between the equipment or devices

• Connect the equipment to an outlet other than the receiver’s

• Consult a dealer or an experienced radio/TV technician for assistance

UG-BEFSR11/41/U31-011220C-JL

Instant Broadband™Series

EtherFast®Cable/DSL Routers

Configuring Your Network with the Cable/DSL Router 33

Configuring PCs to Connect to the Cable/DSL Router 33 Configuring the Cable/DSL Router 35

The Cable/DSL Router’s Web-based Utility 38

Quick and Easy Router Administration 38 Setup 39 Password 41 Status 42 DHCP 43 Log 44 Security 45 Help 47 IP Filtering 49 IP Forwarding 51 Dynamic Routing 53 Static Routing 54 DMZ Hosting 56 MAC Address Cloning 57

Troubleshooting 58

Common Problems 58 Frequently Asked Questions 60

Glossary 64

Appendix 77

How to Ping Your ISP’s E-mail & Web Addresses 77 Installing the TCP/IP Protocol 80 Twisted-Pair Cabling 82 Crimping Your Own Network Cables 83 4-Port Router Specifications 84 4-Port Environmental Specifications 84 1-Port Router Specifications 85 1-Port Environmental Specifications 85 3-Port Router Specifications 86 3-Port Environmental Specifications 86 Customer Support 87

Table of Contents

Introduction 1

The Linksys EtherFast Cable/DSL Router 1 Features 1 Package Contents for the 4-Port Router (BEFSR41) 2 System Requirements 2 Package Contents for the 1-Port Router (BEFSR11) 3 System Requirements 3 Package Contents for the 3-Port Router (BEFSRU31) 4 System Requirements 4

Getting to Know the 4-Port EtherFast Cable/DSL Router 5

The 4-Port Router’s Rear Panel 5 The 4-Port Router’s Front Panel LEDs 6

Getting to Know the 1-Port EtherFast Cable/DSL Router 8

The 1-Port Router’s Rear Panel 8 The 1-Port Router’s Front Panel LEDs 9

Getting to Know the 3-Port EtherFast Cable/DSL Router 11

The 3-Port Router’s Rear Panel 11 The 3-Port Router’s Front Panel LEDs 13

Connecting the Cable/DSL Router to Your Network 15

Overview 15 LANs and WANs 15 IP Addresses: A Quick Lesson 16 Connecting Your Hardware Together & Booting Up 18 Uplinking: Connecting More Devices to Your Router 20

Installing the BEFSRU31’s USB Port Drivers 21

Installing the Windows 98 Driver 21 Installing the Windows 2000 Driver 25 Installing the Windows Millennium Driver 29 Installing the Windows XP Driver 31

EtherFast®Cable/DSL Routers

Package Contents for the 4-Port Router (BEFSR41)• One

• One EtherFast Cable/DSL Router with 10/100 4-Port Switch

• One Power Adapter

• One User Guide

• One Tech Helper CD-ROM

• One Quick Installation and Registration Card (not shown)

System Requirements

• One RJ-45 broadband Inter net connection through a cable or DSL modem

• One PC with a 10 Mbps or 10/100 Mbps Ether net card or adapter installed

• TCP/IP network protocol installed on each PC

• UTP CAT 5 network cables with RJ-45 connectors

• Inter net Explorer 4.0 and higher or Netscape Navigator 4.0 and higher

(Version 5.5 for Internet Explorer and Version 4.7 for Netscape Navigator highly recommended for optimal results)

Instant Broadband™Series

Introduction

The Linksys EtherFast®Cable/DSL Router

Congratulations on the purchase of the EtherFast Cable/DSL Router from Linksys! The EtherFast Cable/DSL Router is the perfect solution for connecting a network of PCs to a high-speed broadband Internet connection and to an Ethernet network backbone. Configurable as a DHCP server for your network, the EtherFast Cable/DSL Router is the only visible network device on the Internet. The Router also serves as your Internet NAT firewall, protecting your network’s PCs from being accessed by external users. All incoming data packets are monitored and filtered. The Router can also be configured to block internal users’access to the Internet with IP Filtering, as well as to play Internet games, video-conference, and much more.

Now all of your PCs can enjoy lightning-fast broadband Internet connections and share internal network data. Link them all together and netw ork faster than you ever thought possible.

Features

• Connect a Broadband Modem to an Ether net Network Backbone

• Equipped With a 3 or 4-Port 10/100 Switch (BEFSRU31 & BEFSR41 ver. 2

only)

• Connects Up to 254 PCs to the Inter net with Just One IP Address

• NAT Firewall Protects Your PCs From Outside Intruders on the Internet

• Configurable Through a PC’s Web Browser Using Netscape Navigator 4.0 or

Internet Explorer 4.0 or Higher

• Suppor ts IPSec Pass-Through for Virtual Private Networking (VPNs)*

• Administer Your Router Remotely Over the Internet

• 10/100 Switch Speeds Up Your Gaming and Multimedia Connections

(BEFSRU31 & BEFSR41 ver. 2 only)

• Configurable as a DHCP Server on Your Network

• Compatible with Virtually All Standard Internet Applications

• Administrators Can Block Specific Inter nal Users’ Internet Access

• DMZ Hosting Feature Enables Internet Multimedia Applications

Such as Video-Conferencing and Internet Gaming

*Limited IPSec Support

EtherFast®Cable/DSL Routers

Instant Broadband™Series

Package Contents for the 1-Port Router (BEFSR11) Package Contents for the 1-Port Router (BEFSR11)

• One EtherFast 10/100 1-Port Cable/DSL Router

• One Power Adapter

• One User Guide

• One Tech Helper CD-ROM

• One Quick Installation and Registration Card (not shown)

System Requirements

• One RJ-45 broadband Inter net connection through a cable or DSL modem

• One PC with a 10/100 Mbps Ether net card or adapter installed

• TCP/IP network protocol installed on each PC

• UTP CAT 5 network cables with RJ-45 connectors

• One hub or switch for multiple computers

• Inter net Explorer 4.0 and higher or Netscape Navigator 4.0 and higher

(Version 5.5 for Internet Explorer and Version 4.7 for Netscape Navigator highly recommended for optimal results)

Package Contents for the 3-Port Router (BEFSRU31)

• One EtherFast Cable/DSL Router with USB Port & 10/100 3-Port Switch

• One USB Cable (not shown)

• One 3.5" Floppy Disk for USB Setup (not shown)

• One Power Adapter

• One User Guide

• One Tech Helper CD-ROM

• One Quick Installation and Registration Card (not shown)

System Requirements

• One RJ-45 broadband Inter net connection through a cable or DSL modem

• One PC with a 10/100 Mbps Ether net card or adapter installed, or a PC with

a USB port

• TCP/IP network protocol installed on each PC

• UTP CAT 5 network cables with RJ-45 connectors

• Inter net Explorer 4.0 and higher or Netscape Navigator 4.0 and higher

(Version 5.5 for Internet Explorer and Version 4.7 for Netscape Navigator highly recommended for optimal results)

EtherFast®Cable/DSL Routers

Instant Broadband™Series

4-Port Router’s Front Panel LEDs

The LAN Indicators

Power Green. The Power LED lights up when the Router is powered

on.

Link/Act Gr een. The Link/Act LED ser ves two purposes. If the LED

is continuously lit, the Router is successfully connected to a device through the corresponding port (1, 2, 3 or 4). If the LED is flickering, the Router is actively sending or recei ving data over that port.

Full/Col Green. The Full/Col LED also ser ves two purposes. If this

LED is lit up continuously, the connection made through the corresponding port is r unning in Full Duplex mode. If the LED flickers, the connection is experiencing collisions. Infrequent collisions are normal.

If this LED flickers too often, there may be a problem with your connection. See the Troubleshooting section if you encounter this problem.

100 Orange. The 100 LED lights up when a successful 100 Mbps

connection is made through the corresponding port.

If this LED does not light up, then your connection speed is 10 Mbps.

Getting to Know the 4-Port EtherFast®Cable/DSL Router

The 4-Port Router’s Rear Panel

Your Router’s ports, where network cables are connected, are located on the rear panel of your Router.

The 4-Port Router’s Ports

WAN The WAN (Wide Area Network) port is where you

connect your cable or DSL modem.

Ports 1-4 These four LAN (Local Area Network) ports con-

nect to network devices, such as PCs, print servers, and remote hard drives. If Port 1 is being used, the Uplink port will not work because these two shared ports have internally shared wiring.

Uplink The Uplink port is used to expand your network by

connecting to another switch or hub. Uplinking to a switch or a hub is done by simply running a cable from the Uplink por t to the other device. See the

Uplinking: Connecting More Devices to the Router section for more on uplinking.

If the Uplink port is being used, Port 1 will not work.

Powe r The Power port is where you will connect the

power adapter.

EtherFast®Cable/DSL Routers

Instant Broadband™Series

Getting to Know the 1-Port EtherFast Cable/DSLRouter

The One-Port Router’s Rear Panel

The rear panel of the Router is where all of the Router’s cabling connections are made, and where you can reset or configure the Router’s LAN port.

The One-Port Router’s Ports

WAN The WAN (Wide Area Network) port is where you

connect your cable or DSL modem.

LAN The LAN (Local Area Network) port is where you

connect your Router to a PC, hub, or switch. If you have more than one PC, connect an Ethernet hub or switch to your Router, and then connect your PCs to that hub or switch.

Power The Power port is where you will connect the

power adapter.

The WAN Indicators

Link Green. The Link LED lights up when a successful connec-

tion is made between the Router and your broadband device or network.

Act Green. The Act LED flickers when the Router is sending or

receiving data over the broadband WAN port (to the Internet).

Diag Red. The Diag LED lights up when the Router goes through

its self-diagnosis mode during every boot-up. It will turn off upon successful completion of the diagnosis.

If this LED stays on for an abnormally long period of time, see the Troubleshooting section.

The Reset Button*The Reset button can be used in one of two ways.

1. If your Router is having prob lems connecting to the Internet, press the Reset

button for just a moment with a paper clip or a pencil tip. This clears up an y jammed connections, and is similar to pressing the Reset button on your PC to reboot it.

2. If you are experiencing extreme problems with your Router and have tried all other troubleshooting measures, press the Reset Button and hold it down until the red Diag LED on the front panel tur ns on and off completely.

This will restore factory defaults and clear all of the Router’s settings, including the IP addresses you entered.

* The Reset Button is located on the front panel of the 4-Port Router, and the rear panels of the 3-

Port Router and the 1-Port Router.

EtherFast®Cable/DSL Routers

is continuously lit, the Router is successfully connected to a device through the LAN port. If the LED is flickering, the Router is actively sending or receiving data through the LAN port.

Full/Col Green. The Full/Col LED also ser ves two purposes. If this

LED remains lit, a LAN port connection is being successfully maintained. If the LED flickers, the connection is experiencing collisions. Infrequent collisions are normal.

If this LED flickers too often, there may be a problem with your connection. See the Troubleshooting section if you encounter this problem.

10/100 Orange. The 10/100 LED lights up when a successful

100Mbps connection is made through the corresponding port.

If a connection is running at 10Mbps, the 10/100 LED will not light up.

The WAN Indicators

Link Green. The Link LED lights up when a successful connec-

tion is made between the Router and your broadband device or network.

Act Green. The Act LED flickers when the Router is sending or

receiving data over the broadband WAN port.

Diag Red. The Diag LED lights up when the Router goes through

its self-diagnostic mode. It will turn off upon successful completion of the diagnosis.

If this LED stays on for an abnormally long period of time, see the Troubleshooting section.

Instant Broadband™Series

Buttons & Switches

The Reset Button Details on the Reset button are found in the Getting

to Know the 4-Port EtherF ast Cable/DSL Router

section.

The Crossover Switch

When“uplinking,” or connecting two pieces of network hardware together, such as a hub and a switch, a general rule of thumb is to plug one end of a network cable into a straight-through port, and the other end into a crossover port. Standard ports are straight-through ports, and uplink por ts are crossover ports.

The 1Port

The LAN Indicators

Power Green. The Power LED lights up green when the Router is

powered on.

Link/Act Green. The Link/Act LED serves two purposes. If the LED

NNoottee::

The diagram above is for reference purposes only. Every network is different. If you do not make a connection to a hub or switch by using the settings above, change the position of the Crossover Switch.

The 1-Port Router’s Front Panel LEDs

This USB icon denotes the presence of a USB port or connector.

Your 3-Port Router comes with a USB cable that has two different types of connectors. Type A, the master connector, is shaped like a rectangle and plugs into your PC’s USB por t. Type B, the slave connector, resembles a square and connects to the USB port on the rear panel of your Router.

EtherFast®Cable/DSL Routers

Instant Broadband™Series

Getting to Know the 3-Port EtherFast Cable/DSLRouter

The 3-Port Router’s Rear Panel Ports

The 3-Port Router’s Ports

Ports 1-3 These three LAN ports connect to your PCs, hubs,

switches, print servers, or any other device with an Ethernet port.

Uplink The Uplink port connects to another hub or switch

for port expansion when you run out of open ports for your network devices. Since the Uplink port and the standard port right next to it share internal wiring, you can only use one of the two ports at a time.

WAN This WAN port connects to your cable or DSL

modem. Your modem connection will not work

from any other port.

Power The Power port is where you will connect the pow er

adapter.

USB The USB port (Type B - slave) can connect to a

USB-ready PC or a USB hub. This allows you to enjoy an immediate, plug-and-play connection without even installing a network adapter for your PC. To work with USB ports, your PC must be running Windows 98, 2000, Millennium, or XP.

USB Compatibility with Your PC

To use the USB port on the 3-Port Router, you must have Windows 98, 2000, Millennium, or XP installed on your PC. USB cannot run in a Windows 95 or NT environment.

Also, your PC must hav e a USB port installed and enabled. Some PCs may have a disabled USB port. If your port doesn’t seem to be working, there may be jumpers on the motherboard or a menu option in the BIOS to enable a PC’s USB por t.

Other motherboards have USB interfaces, but no ports. You can install your own USB port and attach it to your PC’s motherboard using hardware purchased at retail computer stores. See your PC’s User Guide for instr uctions.

USB Type A

USB Type B

USB ports do not work on PCs running

Windows 95 or Windows NT.

EtherFast®Cable/DSL Routers

USB The USB LED lights up when the USB port is successfully

connected to a PC, USB hub, or other USB device.

The WAN Indicators

Link Green. The Link LED lights up when a successful connec-

tion is made between the Router and your broadband device or network.

Act Green. The Act LED flickers when the Router is sending or

receiving data over the broadband WAN port.

Diag Red. The Diag LED lights up when the Router goes through

its self-diagnostic mode. It will turn off upon successful completion of the diagnosis.

If this LED stays on for an abnormally long period of time, see the Troubleshooting section.

Instant Broadband™Series

Buttons

The Reset Button Details on the Reset button are found in the Getting

to Know the 4-Port EtherF ast Cable/DSL Router

section.

The 3-Port Router’s Front Panel LEDs

The LAN Indicators

Power Green. The Power LED lights up g reen when the Router is

powered on.

Link/Act Green. The Link/Act LED serves two purposes. If the LED

is continuously lit, the Router is successfully connected to a device through the corresponding RJ-45 port (1, 2, or 3). If the LED flickers, then that port is sending or receiving data to and from the network.

Full/Col Green. The Full/Col LED also ser ves two purposes. If this

LED is continuously lit, the connection made through the corresponding port is successfully running in Full Duplex mode. If the LED is flickering, the connection is experiencing collisions. Infrequent collisions are normal.

If this LED flickers too often, there may be a problem with your connection. See the Troubleshooting section if you have problems.

100 Orange. The 100 LED lights up when a successful 100Mbps

connection is made through the corresponding port. If this LED does not light up, then your connection speed is 10 Mbps.

EtherFast®Cable/DSL Routers

Instant Broadband™Series

Your Router’s firewall (NAT) protects your network of PCs with security so users on the public, Internet side cannot “see” your PCs. This is how your internal LAN, or network, remains private.

Remember that your Router’s por ts connect to two sides: your 10/100 LAN port(s) and the Internet WAN port. The LAN port(s) transmit data at 10 Mbps or 100 Mbps, whereas the broadband port, or WAN port, transmits data at 10 Mbps, because 10Mbps is currently the maximum speed for cable and DSL service.

IP Addressing: A Quick Lesson

What’s an IP Address?

IP stands for Internet Protocol. Every device on an IP-based network, including PCs, print servers, and routers, requires an IP address to identify its “location,” or address, on the network. Since the Internet is simply one huge global network, every PC that logs on to the Internet also needs an IP address.

There are two ways of assigning an IP address to your network devices.

Static IP Addresses

A static IP address is a fixed IP address that you assign manually to a PC or other device on the network. Since a static IP address remains valid until you disable it, static IP addressing insures that the device assigned it will always have that same IP address. Static IP addresses are commonly used with network devices such as server PCs or print servers.

If you use your Router to share your cable or DSL Internet connection, contact your ISP to find out if they have assigned a static IP address to your account. If so, you will need that static IP address when configuring your Router.

Connecting the Cable/DSL Router to Your Network

Overview

Unlike a hub or a switch, the Cable/DSL Router’s setup consists of more than simply plugging hardware together. Since the Router acts as a DHCP server, you will have to set some values for the Router and also configure your networked PCs to accept the IP addresses that the Router assigns them.

You will need the following data from your Internet Service Provider (ISP) to install the Cable/DSL Router:

•Your broadband-configured PCs’ Computer Name and Workgroup Name

• Your broadband-configured PCs’fixed

Internet IP Address

• Your Subnet Mask

•Your Default Gateway

•Your Primary DNS Server IP address(es)

The installation technician from your ISP should hav e left this information with you after installing your broadband connection. If not, you can call your ISP to request the data.

Once you have the above values, you can begin the installation and setup of your EtherFast Cable/DSL Router.

LANs and WANs

Simply put, a router is a network device that connects two networks together.

In this instance, your EtherFast Cable/DSL Router connects your Local Ar ea

Network (LAN), or the group of PCs in your home or of fice, to the Wide Area Network (WAN), that is, the Internet. Your Router processes and regulates the

data that travels between these two networks.

Think of your Router as a network device with two sides: the first side is made up of your private Local Area Network (LAN) of PCs, which this User Guide sometimes calls the “internal LAN.” The other, public side is the Internet, or the Wide Area Network (WAN), outside of your home or office.

}

Only if applicable

Since your Router is a device that connects two networks, it needs two IP addresses—one for the LAN side, and one for the WAN side. In this User Guide, you’ll see references to the “WAN IP address” and the “LAN IP address.”

Since the Router has firewall security (NAT), the only IP address that can be seen from the Internet for your network is the Router’s WAN IP address.

However, even this WAN IP address for the Router can be blocked, so that your Router and network seem invisible to the Internet—see the Blocking

WAN Requests description under IP Filtering.

EtherFast®Cable/DSL Routers

Connecting Your Hardware Together and Booting Up

1. Before you begin, make sure that all of your hardware is powered off,

including your Router, PCs, hubs, switches, and the cable or DSL modem.

2. A.If you have the 4-Port Cable/DSL Router, connect one end of a network cable to one of the LAN ports (labeled 1, 2, 3, or 4) on the back of the Router, and the other end into a standard port on a network de vice, e.g., a PC, print server, hub, or switch. See the Twisted-Pair Cabling section for details on network cabling.

Repeat the above step to connect more PCs or network devices to the Router.

2. B. If you are connecting the 1-Port Router to just one PC, plug one end of a network cable into the Router’s LAN port and the other end into the PC’s network adapter port. Set the Crossover Switch to straight-through mode

(

|| ). If the straight-through mode does not light up a Link LED, see the

chart in the Getting to Know the 1-Port EtherFast Cable/DSL Router section.

If you are connecting the 1-Port Router to a hub or switch, plug one end of a network cable into the Router’s LAN port, and the other end into to a standard port on your network’s hub or switch. Set the LAN port’s Crosso v er

Switch to its straight-through ( || ) mode. Please refer to the chart in the

Getting to Know the 1-Port EtherFast Cable/DSL Router section.

If your hub or switch has no more standard ports available, connect the

Router using its LAN port to the Uplink por t on the hub or switch. Set the Crossover Switch to straight-through mode ( || ) for this set-up.

2. C. If you have the 3-Port Cable/DSL Router, connect one end of a net- work cable from the one of the Router’s LAN ports (labeled 1, 2, or 3) to a port on a PC, hub, switch, or other network device.

The 3-Port Router features one USB plug-and-play port that connects instantly to any USB-ready PC or hub. This allows you to connect to and access your Router without even installing any network cards.

A standard port is any port other than the WAN port

and the Uplink port. It’s a straight-through port.

Instant Broadband™Series

Dynamic IP Addresses

A dynamic IP address is automatically assigned to a device on the network, such as PCs and print servers. These IP addresses are called “dynamic” because they are only temporarily assigned to the PC or device. After a certain time period, they expire and may change.

If a PC logs on to the network (or the Internet) and its dynamic IP address has expired, the DHCP server will assign it a new dynamic IP address.

DHCP (Dynamic Host Configuration Protocol) Servers

PCs and other network devices using dynamic IP addressing are assigned a ne w IP address by a DHCP server. DHCP frees you from having to assign IP addresses manually every time a new user is added to your network.

DHCP servers can either be a designated PC on the network or another netw ork device, such as the Cable/DSL Router.

By factory default, a DHCP server (LAN side) is enabled on your Router. If you already have a DHCP server running on your network, you must disable one of the two DHCP servers. If you run more than one DHCP server on your network, you will experience network errors, such as conflicting IP addresses. To disable DHCP on your Router, see the section on DHCP in The Cable/DSL

Router’ s Web-based Utility.

Even if you assign a static IP ad dress to a PC, other PCs can still use DHCP’s dynamic IP addressing,as long as the static IP is not within DHCP range of the LAN IP Address.

If the dynamic IP addressing fails to provide a dynamic IP address for any reason, please refer to the Troubleshooting Section.

3. Connect the network cable from your cable or DSL modem to the WAN

port on your Router’s rear panel. This is the only port that will w ork for y our modem connection.

4. Connect the power adapter to the Powe r port on the rear panel of the

Router, and then plug the power adapter into a power outlet.

•The Power LED on the front panel will light up green as soon as the power

adapter is connected properly.

• The Diag LED will light up red for a few seconds when the Router goes

through its self-diagnostic test. This LED will turn off when the self-test is complete.

5. Power on the cable or DSL modem.

6. Press the Reset button on the Router’s front panel with a paper clip or a pencil. Hold the button in until the Diag LED lights up and then turns off. This will restore the Router’s factory default settings.

The Router’s hardware installation is now complete.

Continue to the next section to configure

the Router with your PCs.

Technical Checkpoint:

Did you remember to check for Link LEDs for all your connections?

If all of your Link LEDs are not lighting up, make sure that all your cables are securely plugged in, and that all of your hardware is powered on properly.

EtherFast®Cable/DSL Routers

Uplinking: Connecting More Devices to Your Router

If your Router’s LAN ports are all full and you still have PCs and/or devices to connect, connect a hub or a switch to your Router.

To do so, use the Router’s Uplinkport to connect to a standard port on a hub or switch. If you have a PC/device connected to the port right next to the Uplink port (on the 3- and 4-Port Routers), disconnect that PC/device and plug it into an open port on the new hub or switch.

Since the Uplink port shares internal wiring with the port right next to it, you can only use only one of these two ports at a time: these ports are called shared ports.

If your new hub or switch also has an Uplink por t, it too can be uplinked when you next run out of ports, and so on.

Use the Router’s Uplink port to connect to a standard port on a hub or switch. This leaves you with new, open ports on the hub or switch, to which you can add more PCs and/or network devices.

See your nearest Linksys retailer or visit www.linksys.com for complete product lines of 10/100 Mbps hubs and switches.

Instant Broadband™Series

Note: It is highly recommended that you plug your Router into a power strip with surge protection.

EtherFast®Cable/DSL Routers

3. Select “Search for the best driver for your device (Recommended).”

Click the Next button.

4. Select “Floppy disk drives” and click the Next button to start the search

for your driver.

Instant Broadband™Series

Installing the BEFSRU31’s USB Port Drivers

Use the enclosed USB cable to connect your PC to the Router: the Type A end connects to your PC’s USB por t, while Type B connects to the Router’s USB port. Now that all of your Router’s hardware is connected together, you must enable the PC that will connect to the Router through its USB port.

Since your USB connection acts as a network adapter for your PC, there’s no need for you to install a network adapter for that PC. Just follow the directions below to enable your PC’s USB connection to the Router:

• If you are running Windows 98, continue on this page, below.

• For other Windows operating systems, please refer to the appropriate section

as listed in the Table of Contents.

You can also connect your Router’s USB port to other USB devices besides USB-ready PCs, such as USB hubs.

Installing the Windows 98 Driver

1. With the router connected to your PC’s USB port, start up your PC in Windows 98 and insert the driver disk.

2. Windows will display a message saying that it has detected new hardware.

Click the Next button.

After you finish this configuration, make sure that TCP/IP is installed on your PC(s). For instructions on installing TCP/IP, see the Installing the TCP/IP Protocol section in the Appendix.

EtherFast®Cable/DSL Routers

7. Windows will notify you that it has completed copying the driver files to

your PC. Click the Finish button.

8. Windows will ask you if you want to restart your PC. Click the Yes button

so your new installation will take effect.

If it does not ask you, click the Start button, and select Shut Down. Then select Restart and click the Ye s button.

Your USB installation is now complete.

Go to the Configuring Your Network with the

Cable/DSL Router section to configure your

network to work with the Router.

Instant Broadband™Series

5. A new window will appear, saying that Windows is now ready to install the best driver for this device. Click the Next button to continue.

6. Windows will begin copying the files to your PC. Do not click the Cancel button or press the Esc key during this process.

If Windows asks for your Windows operating system files before copying, direct your PC to the location of those files, e.g, c:\windows\options\cabs, or D:\Win98 (assuming that your CD-ROM drive is named D).

EtherFast®Cable/DSL Routers

Instant Broadband™Series

3. When Windows asks you where to search for driver files, select “Floppy

disk drives” and click the Next button.

4. Windows will show a message saying that it has found the driver files.

Click the Next button.

Installing the Windows 2000 Driver

1. With the Router connected to your PC’s USB port, start up your PC in Windows 2000 and insert your driver disk. Windows will show a message notifying you that the PC has found new hardware. Windows’ Hardware Wizard will show a message to say that it is ready to start installing the driver files to your PC. Click the Next button.

2. Select “Search for a suitable driver for my device (Recommended)” and

click the Next button.

EtherFast®Cable/DSL Routers

7. Windows will display a message saying that it has finished installing the

driver files on your PC. Click the Finish button to complete the installation.

8. Go to the Start button, and select the Settings option. Then select the

Network and Dial-up Connections option, and click the Local Area Connection icon. Click the Properties button to display the screen below. Highlight Internet Protocol (TCP/IP) as shown below, and click on the Properties button. Make sure that TCP/IP is set to Obtain an IP Address

Automatically.

Instant Broadband™Series

5. When the Digital Signature Not Found screen appears, Windows will ask you if you want to continue with the installation. Click the Yes button.

6. Click the Next button for Windows to copy the driver f iles to your PC.

EtherFast®Cable/DSL Routers

Instant Broadband™Series

Installing the Windows Millennium Driver

1. With the router connected to your PC’s USB port, start up your PC in Windows Millennium, and insert your driver disk.

2. Windows will notify you that new hardware has been detected (shown above). Select “Automatic search for a better drive (Recommended),” and click the Next button.

3. Windows will display a message saying that it has finished installing the driver files on your PC. Click the Finish button.

4. Windows will ask you to restart your PC. Click the Yes button.

5. When your PC is finished restarting, click the Start button, and select Settings, Control Panel, and Network. Make sure that TCP/IP is installed for your PC as shown on the screen below. If TCP/IP is not installed, please go to the Installing the TCP/IP Protocol section in the Appendix for instructions on installation.

Your USB installation is now complete.

Go to the Configuring Your Network with the

Cable/DSL Router section to configure your

network to work with the Router.

EtherFast®Cable/DSL Routers

Instant Broadband™Series

Installing the Windows XP Driver

1. With the router connected to your PC’s USB port, start up your PC in Windows XP, and inser t your driver disk.

2. Windows will notify you that new hardware has been detected (shown above). Select “Install from a list or specific location (Advanced),” and click the Next button.

3. Select “Search for the best driver in these locations.” Then select “Include

this location in the search:” and enter “A:\” in the location field. Click the Next button.

4. When the Hardware Installation screen appears, click Continue An ywa y.

4. Windows will display a message saying that it has finished installing the

driver files on your PC. Click the Finish button.

5. Click the Start button and then Control Panel. Double-click Network Connections and then Local Area Connection. Click Properties. Check for Internet Protocol (TCP/IP) to make sure that TCP/IP is installed on your PC. If TCP/IP is not installed, please refer to your Windows XP user guide.

Your USB installation is now complete.

Continue on to the next page to configure

your network to work with the Router.

EtherFast®Cable/DSL Routers

Instant Broadband™Series

4. Click the Properties button, and then choose the IP Address tab. Select

Obtain an IP address automatically. Click the OK button.

You have now completed the PC’s client settings, so it can connect to the Router.

5. Click the OK button. Windows may ask for original Windows installation

files. Direct your PC to the location of the files, e.g., D:\win98, D:\win9x, D:\win95, or c:\windows\options\cabs.

6. Windows will ask you to restart the PC. Click the Yes button.

7. Repeat these steps for each PC on your network.

When all of your PCs are configured,

the TCP/IPsetup and configuration are complete.

Continue to the next section

to complete your network setup.

Configuring Your Network with the Cable/DSLRouter

Configuring PCs to Connect to the Cable/DSL Router

Now you may have to configure your other PCs to accept the IP addresses that your Router will provide. If you have not set a static IP or dynamic IP address, please follow the directions below. Otherwise, skip to the next section titled Configuring Your Cab le/DSL Router. Note: Make sure that a network card or adapter has been successfully installed in each PC you plan on configuring before continuing.

1. Click the Start button. Select Settings and then Control Panel.

2. Double-click the Network icon.

3. In the Configuration window, select the TCP/IP protocol line associated

with your network card/adapter. If there is no TCP/IP protocol line listed for your card/adapter, go to the Installing the TCP/IP Protocol section in the Appendix to install the TCP/IP protocol now.

Note: These instructions apply only to Windows 95, Windows 98, and Windows ME machines. For TCP/IP setup under Windows NT or 2000, see your Windows manual.

EtherFast®Cable/DSL Routers

Instant Broadband™Series

3. The Cable/DSL Router’s Setup page will appear.

4. Configure the following values:

Host Name & Domain Name These f ields allow you to give the Router a Host and Domain name. Some ISPs require these names as identification. You may have to check with your ISP to see if your broadband Internet service has been configured with Host and Domain names. In most cases, leaving these two fields blank will still work.

LAN IP Address These values refer to your internal network settings. Unless you hav e specific internal needs, there should be no reason to change these values. For the internal LAN side, the Router’s default values are as follows:

• Private IP Address: 192.168.1.1

• Subnet Mask: 255.255.255.0

Now that your TCP/IP setup is complete, you can begin configuring your Router.

1. Open your web browser and type http://192.168.1.1 in the browser’s

Address field. This number is the Router’s default IP address. Press the Enter key.

2. A username and password promptwill appear. Leave the User Name field empty and type “admin,” which is the default password, into the Password box. Click the OK button.

IIMMPPOORRTTAANNTT!!

If you have previously enabled any

IInntteerrnneett--sshhaarriinngg pprrooxxyy

sseerrvveerr ssooffttwwaarree

on any of your PCs, you must disable it now.

Some examples of Internet-sharing software are Internet LanBridge, Wingate, and Sygate. To disable your Internet-sharing software:

• If you are running Netscape Navigator: Click

EEddiitt

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AAddvvaanncceedd

PPrrooxxiieess

>. Click

DDiirreecctt CCoonnnneeccttiioonn ttoo tthhee IInntteerrnneett

• If you are running Internet Explorer, click

SSttaarrtt

SSeettttiinnggss

CCoonnttrrooll

PPaanneell

IInntteerrnneett OOppttiioonnss

CCoonnnneeccttiioonnss

LLAANN SSeettttiinnggss

. Remove

the checks from all three boxes. Click the

OOKK

button to continue.

Also, you must disable any

IInntteerrnneett lloogg--oonn ssooffttwwaarree

(such as Ivasion

Winpoet or Enternet 300) and any

ffiirreewwaallll ssooffttwwaarree

(such as ZoneAlarm

and Watchdog) on all of your PCs.

Configuring the Cable/DSL Router

NNoottee::

Your screen may vary slightly from the screen shown here.

Instant Broadband™Series

WAN IP Address These values refer to the external network (the Internet) you connect to every time you access your Internet connection.

Most broadband ISPs assign their clients to a different IP address each time they log on. If this is the case with your ISP, select Obtain an IP Address Automatically and go to Step 5.

If your ISP assigns you a fixed, static IP address, select Specify an IP

Address and enter the appropriate values into the IP Address, Subnet Mask, Default Gateway Address and DNS (Required) f ields as provided

by your ISP.

5. When you have properly configured the Setup window, click the Apply but- ton, and then click the Continue button.

6. Select the DHCP tab. For more information on this feature, refer to the appropriate section under The Cable/DSL Router’s Web-based Utility.

7. DHCP is already enabled on your Router by factory default. By leaving the

setting on Enable, the Router is configured to automatically assign IP addresses to each of your PCs.

If you already have a DHCP server on your netw ork, select Disable for the DHCP Server option. If you do so, you must use your existing DHCP server’s LAN IP address, or you may need to assign your Router a new static LAN IP address.

In the Number of DHCP Users field, you may enter the number of PCs you plan on networking to the Router. If you add more PCs to your network in the future, don’t forget to change this value.

8. Click the Apply button and then click the Continue button.

9. Reset the power on the cable or DSL modem, and restart the PC so

the new Router settings will take effect.

Your Cable/DSL Router is now configured on your network.

If you want to learn more about the Router’s Web-based Utility,

proceed to the next section.

EtherFast®Cable/DSL Routers

3837

The Cable/DSLRouter’s Webbased Utility

Quick & Easy Router Administration

The EtherFast Cable/DSL Router uses a web browser-based administrative Utility that is programmed into a chipset. All administrative tasks for the Router are performed through this Setup Utility. The Utility can be accessed through any PC on the network by typing http://192.168.1.1 into the web browser’s Address field (even if that PC does not yet have Internet access), as shown below.

After entering the address value into the web browser, a password request page will pop up. Leave the User Name field blank and type “admin” into the Password field. Then click the OK button.

In this section, you’ll find brief descriptions of each web page in the Utility and each page’s key functions. More detailed explanations and instructions can be found by clicking each page’s Help button in your Router’s Setup Utility.

To apply any of the settings you change on a page, click the Apply button, and then click the Continue button. To clear any values you’ve entered on any page, click the Cancel button.

Note: If you need to enable PPPoE support, choose PPPoE. If you do enable PPPoE, remember to remove any existing PPPoE applications already on any of your PCs. More information on PPPoE can be found under the Setup heading in the next section.

EtherFast®Cable/DSL Routers

Instant Broadband™Series

• WAN IP Address This is the IP address that your Router has, when seen

from the external WAN, or the Internet.

• Subnet Mask This is the Router’s Subnet Mask, as seen by external users on the Internet (including your ISP). If you select Obtain an IP Address

Automatically, your ISP will assign these values.

• Default Gateway Address Your ISP will provide you with the Default

Gateway IP Address. If you select Obtain an IP Address Automatically, your ISP will assign these values.

• DNS (Domain Name System) IP Address Your ISP will provide you with at least one DNS Server IP Address. If you select Obtain an IP Address

Automatically, these values will be assigned by your ISP.

• PPPoE (Point-to-Point Protocol over Ethernet) Some DSL-based ISPs

use PPPoE to establish communications with their end-users. If you are using a DSL line, check with your ISP to see if they use PPPoE. If they do use PPPoE, you must enable it. To enable PPPoE:

1. Click on the PPPoE option in the Login section of the Setup screen.

2. Enter the User Name you use to log on to your Internet connection.

3. Enter your corresponding Password.

• Connect on Demand If you aren’t activel y using the Internet, you can configure your Router to cut your connection with your ISP after a certain period of time. If you have been disconnected due to inactivity, Connect on Demand enables your Router to automatically re-establish your connection as soon as you attempt to access the Internet again. If you wish to activate

Connect on Demand, choose the Enable option.

• Max Idle Time Max Idle Time is the number of minutes that passes before

the Router drops your Internet connection, due to inactivity. If you want your Internet connection to remain on at all times, enter zero (0) in this field and click the Apply button. Otherwise, enter in the number of minutes you want to elapse before your Internet access disconnects.

• Keep Alive Option This option keeps your PPPoE-enabled Internet access connected indefinitely, even when it sits idle. It keeps the connection alive by sending out a few data packets periodically, so your Internet service thinks that the connection is still active. To use this option, click the box next to Keep Aliv e to select it, and click the Apply button.

You can check whether the values you entered for the above

settings are correct by testing your Internet access.

Setup

The Basic Setup screen is the first screen you see when you access the Setup Utility. If you have already installed and set up your Router, you have already seen this screen and properly configured all of the screen’s values.

• Host Name & Domain Name These fields allow you to supply a host and

domain name for the Router. Some ISPs require these names as identification. You may have to check with your ISP to see if your Broadband Internet service has been conf igured with a host and domain name. In most cases, leaving these fields blank will work.

• Firmware Version This entry shows the version and date of the f irmware

you are using. Future versions of the Router’s f ir mware will be posted and available for download on the Linksys website at www.linksys.com.

• LAN IP Address and Subnet Mask The values for the Router’s IP Address

and Subnet Mask are shown here. The default value is 192.168.1.1 for the IP address and 255.255.255.0 for the Subnet Mask.

NNoottee::

The Setup page in this picture may differ slightly from the one you see.

Password

It is strongly recommended that you set a password for the Router. When you first power up the Router, there is no default Password setting assigned.

If you leave the password field blank, all users on your network will be able to access the Router simply by entering the unit’s IP address into their web browser’s location window.

If you select the Restore Factory Default option and click the Apply button, you will clear all of the Router’s settings.

Do not restore the factory defaults unless you are having difficulties with the Router and have exhausted all other troub leshooting measures. Once the Router is reset, you will have to re-enter all of your configuration data.

Status

EtherFast®Cable/DSL Routers

Instant Broadband™Series

This tab displays the current status of the Router; it reflects the data and selections you’ve entered under the Setup tab.

All of the information provided on this screen is read-only. To make changes, select the Setup tab.

• Host Name This field shows the name of your Router. This entry is neces-

sary for some ISPs.

• Firmware Version This f ield shows the installed version and date of the

fir mware. Version dates are slightly more accurate than version numbers.

• Login This field shows whether you have enabled the use of the Router’s

PPPoE (Point-to-Point Protocol over Ethernet) support.

• LAN These f ields display the current IP Address and Subnet Mask of the Router, as seen by users on your internal network. DHCP Server shows the status of the Router's DHCP server function, which is either enabled or disabled.

Status

Password

EtherFast®Cable/DSL Routers

not be greater than 253. In order to determine the DHCP IP Address range, add the starting IP address (e.g. 100) to the number of DHCP users. By default as shown, add 100 to 50, and the range is 192.168.1.100 to

192.168.1.150.

• DHCP Clients Table Click the DHCP Clients Table button to show the

current DHCP Client data. (This data is stored in temporary memor y and changes periodically.)

The Log feature pro vides you with a log of all incoming and outgoing URLs or IP addresses for your Internet connection. The Logviewer keeps track of all incoming and outgoing activity that can be saved in a text file. The IP address points to the location where Logviewer is running.

The Outgoing Access Log lists all the URLS or IP addresses of Internet sites that users on your network have accessed, and the Incoming Access Log gives you a log of all incoming Internet traffic.

This data can also be accessed by other network users if the file is shared out.

1. To activate logging, select Enable next to “Access Log.”

2. Specify the IP address of the PC that you want to send the log to. Make

sure that this PC is using a static IP address. Click the Applybutton and then

the Continue button when you’re done. You may download the Logviewer software at www.linksys.com for more information.

3. Click on Outgoing Access Log or Incoming Access Log to view each log.

4. To disab le Logging, select Disable in the Log window. Click the Applybutton and then the Continue button.

Log

Instant Broadband™Series

•WAN These fields display the WAN IP Address, WAN Subnet Mask and

WAN Default Gateway IP address of the Router, as seen by external users on the Internet. The DNS (Domain Name System) IP Addr essfields show the IP address(es) of the DNS currently used by the Router. Multiple DNS IP settings are common. In most cases, the first available DNS entry is used.

• DHCP Clients T ab le This table lists the PCs that were given IP addresses

by the Router.

DHCP

A Dynamic Host Configuration Protocol (DHCP) server automatically assigns IP addresses to each PC on your network for y ou. Unless you already have one, it is highly recommended that you leave your Router enabled as a DHCP server.

• DHCP Server DHCP is already enabled by factory default. If you already

have a DHCP server on your network, set the Router’s DHCP option to Disable. Click the Apply button and then the Continue button. If you dis- able DHCP, remember to assign a static IP address to your Router.

• Starting IP Address Enter a value for the DHCP server to start with when

issuing IP addresses. This value must be (192.168.1. 2) or greater, because the default IP address for your Router is 192.168.1.1.

• Number of DHCP Users (Optional) Enter the maximum number of PCs

that you want the DHCP server to assign IP addresses to. This number can-

EtherFast®Cable/DSL Routers

Instant Broadband™Series

The Security tab enables configuration of your router to provide enhanced network security using ZoneAlarm Pro and PC-cillin (sold separately). The Router provides a built-in Internet NAT firewall. ZoneAlarm Pro enhances the Router’s security capabilities for increased protection against hack ers and other threats from the Internet. PC-cillin protects against viruses. ZoneAlarm Pro and PC-cillin work independently of each other. For more information on ZoneAlarm Pro, PC-cillin, and DSL or cable network security, please click the on-screen link to the Internet Security Center. This website will provide more information.

Software Download

Click this button to purchase and download ZoneAlarm Pro and/or PC-cillin at the Internet Security Center. Print the summary page, which contains the license key needed for installation, or write down the license key if you are unable to print the page. You will also be e-mailed a confirmation invoice with the key included. When adding security enhancements to your other networked computers, you can either copy the downloaded files to the other PCs or redownload the software on each indi vidual PC without incurring any more costs.

Security

ZoneAlarm Pro Settings

If you have downloaded ZoneAlarm Pro, complete this section.

License Key Enter the License Key for ZoneAlarm Pro. The License Key will be e-mailed to you after you purchase ZoneAlarm Pro.

Enforce ZoneAlarm Pro Security Click this box to enable ZoneAlarm Pro on your router. This will require every PC user to have ZoneAlarm Pro installed on his or her PC before being allowed to access the Internet (except for exempt computers).

Enforcement Level This sets how often ZoneAlarm Pro will check for unauthorized intrusions. More Secure(default setting) enab les ZoneAlarm Pro to check frequently. Conserve Bandwidth enables ZoneAlarm Pro to check less frequently; this uses less bandwidth. It is recommended to set the Enforcement Level at the More Secure setting unless there is router performance degradation.

PC-cillin Settings

If you have downloaded PC-cillin, complete this section.

Enforce PC-cillin Anti-Virus Click this box to enable PC-cillin Anti-Virus on your router.

Exempt Computers

If you wish to exempt any computers from enforcement of ZoneAlarm Pro

and/or PC-cillin, complete this section.

Enable/Disable To enable or disable computer exemptions, click Enable or Disable.

From IP Address/To IP Address Type in the range of IP addresses for the computers you want to exempt from enforcement of ZoneAlarm Pro and/or PC-cillin.

Note:Your license key will be e-mailed to you.

EtherFast®Cable/DSL Routers

To upgrade the Router’s firmware:

1. Select the Help tab (shown on the

previous page).

2. Click on Upgrade Firmware to display a new window (shown below):

3. Enter your Router’s administration password into the Password Confirm

field.

4. Click the Browse button to f ind the firmware upgrade file that you down-

loaded from the Linksys website.

5. Double-click the Upg rade f ile. Click the Upgrade button and follow the

instructions there.

Instant Broadband™Series

Note: By upgrading the Router’s fir mware, you may lose the Router’s configuration settings.

Under the Help tab, you’ll find links to all of the Utility’s internal support documentation, including the application that upgrades the Router’s firmware.

New firmware versions are posted at www.linksys.com and can be downloaded for free. If your Router can access the Internet already, there’s no need to download a newer firmware version, unless that version has a new feature that you want to use. Loading ne w firmware onto your Router does not enhance the speed or the quality of your connection speed.

See the next section for directions on enabling remote firmware upgrades (IP Filtering).

Dynamic Routing

Help

EtherFast®Cable/DSL Routers

Instant Broadband™Series

in the command prompt. To set the MAC f ilter, click the Edit MACFilter Setting button. When a second window appears, select the range in the drop-

down box, and at the MAC number prompt, enter the 12-digit MAC address you want to filter. Click the Apply button and the Continue button, before closing the window.

SPI (Stateful Packet Inspection)

• This feature checks the state of a packet to verify that the destination IP

address matches the source IP of the original request. To use the firewall, click the Enable button; otherwise select Disable to use the NAT f irewall.

Blocking WAN Requests

• By enabling the Block WAN Request feature, you can prevent your network

from being “pinged,” or detected, by other Internet users. The Block WAN Request feature also reinforces your network security by hiding your network ports. Both functions of the Block W AN Request feature make it more difficult for outside users to work their way into your network.

• Click the Apply button and then the Continue button to save your changes.

Using Multicast Pass Through

• This feature allows for multiple transmissions to specific recipients at the

same time. Select Enableto support the feature, or Disab leto keep the router from multicasting.

Using IPSec Pass Through

• This feature lets you use IPSec Pass Through. To use this feature, click the

Enable button next to “IPSec Pass Through,” and then the Apply button.

• To disable IPSec Pass Through, click on Disable and then the Apply button.

Using PPTP Pass Through

• Point-to-Point Tunneling Protocol is the method used to enable VPN

(Virtual Private Networking) sessions. To enable this feature, click on

Enable next to PPTP Pass Through, and then click Apply.

• To disable this feature, click on Disable next to PPTP Pass Through, and

then click the Apply button.

Using Remote Management

•This feature allows you to manage your Router from a remote location, via the

Internet. To enable this feature, click on Enable, and then click the Apply button. Remote Management must be activated before you can manage the Router from a remote location.

• To disable Remote Management, click on Disable, and then click the Apply

button. If you wish to use this feature on the browser, enter http:\\<WAN IP

Address>:8080.

• To disable this feature, click on Disable, and then click the Apply button.

IP Filtering

IP filters block specif ic internal users from accessing the Inter net and enable VPN (Virtual Private Network) sessions. You can set up filters by using IP addresses or network port numbers (or a range of ports).

Setting Up Filters

• To set up a filter using IP addresses, enter the range of IP addresses you wish

to filter into the IP address fields. Users who have filtered IP addresses will not be able to access the Internet at all. If you only want to f ilter one IP address instead of a range of IP addresses, enter the same value into both fields. For instance, if you wish to filter the PC with the IP address of

192.168.1.5, enter 5 into both fields on one line: 192.168.1.5~ 192.168.1.5. Click the Apply button when you’re done.

• To filter users by network port number, enter a network port number or a

range of network ports. Enter the port numbers you want to filter into the port numbers fields. Users connected to the Router will no longer be able to access any port number listed there.

Editing MAC Filter Setting

• This feature f ilters the network adapter’s specific MAC address from going

out to the Internet.

•To check your network adapter’s MAC address, run “winipcfg” or “ipconfig”

NNoottee::

Only

one

VPN session may be conducted at a time.

EtherFast®Cable/DSL Routers

To add a server using Forwarding:

1. Enter the port number or range of ports used by the server. On the same

line, select the protocol UDP, TCP, or Both, and enter the LAN IP address of the server that you want the Internet user(s) to access.

2. Configure as many entries as needed—the Router supports up to 10 ranges

of ports. Click the Apply button when you’re done.

Using Port Triggering

Port triggering allows the Router to watch outgoing data for specific port numbers. The IP address of the computer that sends the matching data is remembered by the Router, so that when the requested data returns through the f irewall, the data is pulled back to the proper computer by way of IP address and port mapping rules.

1. Enter the application name of the trigger.

2. Enter the port range used by the application.

3. Enter the incoming port range used by the application.

4. Click the Apply button to continue.

Instant Broadband™Series

Using Remote Upgrade

• This feature allows you to upgrade your Router’s f irmware from a remote location. To enable Remote Upgrade, click on Enable, and then click on the Apply button. Remote Management must be activated before you can manage the Router from a remote location.

Using MTU (Maximum Transmission Unit)

• This feature specifies the largest packet size permitted for network transmission. Select Enable and enter the value desired. It is recommended that you leave this value at the 1200 to 1500 range. For most DSL users, it is recommended to use 1492. By default, MTU is set at 1500 when disabled.

Forwarding sets up public services on your network, such as web servers, ftp servers, or email servers. When users send this type of request to your netw ork via the Internet, the Router will forward those requests to the appropriate PC. Before using Forwarding, the Router’s DHCP function must be disabled under the DHCP tab and the Router must be assigned a new static LAN IP address because the IP address may change when using the DHCP server.

IP Forwarding

EtherFast®Cable/DSL Routers

Instant Broadband™Series

If your Cable/DSL Router is connected to more than one network, you may have to set up a static route between the two networks. A static route is a predetermined pathway that network data packets must travel to reach a specific host or network. Click the Sho w Routing Tab lebutton to view the current stat- ic routing configuration.

Static Routing

With Dynamic Routing, you can automaticall y adjust to ph ysical changes in the network’s layout. The Router, using the RIP protocol, calculates the most efficient route for the network’s data packets to travel between the source and the destination, based upon the shortest paths. The RIP protocol regularly broadcasts routing information to other routers on the network.

To set up dynamic routing:

1. Select the correct working mode. Gateway Mode should be used if your

Router is hosting your network’s connection to the Internet. Router Mode should be selected if the Router exists on a network with other routers.

2. Select the protocol (TX) by which you transmit data on the network.

3. Select the protocol (RX) by which the Router receives network data.

4. Click the Apply button to save your changes.

Static

Dynamic Routing

EtherFast®Cable/DSL Routers

Instant Broadband™Series

DMZ Hosting

The DMZ Hosting feature allows one local user to be exposed to the Internet for use of a special-purpose service such as Inter net gaming and video-conferencing.

Whereas IP Forwarding can only forward a maximum of 10 ranges of ports, DMZ hosting forwards all the ports for one PC simultaneously.

• To expose one PC, enter the computer’s IP address and click the Apply but-

ton.

• Deactivate DMZ by entering a zero (0) in the field and clicking the Apply

button.

To create a static route entry:

1. Select Static Route Entry from the drop-down list. The Cable/DSL Router

supports up to 20 static route entries.

2. Enter the following data to create a static route:

Destination LAN IP The Destination LAN IP address is the address of the remote network or host to which y ou want to assign a static route. Enter the IP address of the host for which you wish to create a static route here. If you are establishing a route to an entire network, be sure that the network portion of the IP address is set to zero (0).

For example, the Router’s standard IP address is 192.168.1.1. Based on this address, the address of the network to which the Router is connected is

192.168.1, with the last digit (1, in this case) determining the Router’s place on the network. Therefore, you would enter the IP address 192.168.1.0 if you wanted to route to the Router’s entire network, rather than to just the Router.

Subnet Mask The Subnet Mask (also called the Network Mask) determines which portion of an IP address is the network portion and which portion is the host portion. In the example above, the Network Mask is

255.255.255.0. This determines (by using the values 255) that the first three numbers of an network IP address identify this particular network, while the last digit (from 1 to 254) would identify the specific host.

Default Gateway This IP address must be the IP address of the gateway device that allows for contact between the Router and the remote network or host.

Hop Count This value gives the number of nodes that a data packet passes through before reaching its destination. A node is any device on the network, such as switches, PCs, etc.

Interface Interface tells you whether your network is on the LAN or the WAN, or the Internet. If you’re connecting to a sub- network, select LAN. If you’re connecting to another network through the Internet, select WAN.

3. Click the Apply button to save your changes.

EtherFast®Cable/DSL Routers

Instant Broadband™Series

Troubleshooting

Common Problems and Solutions

This section provides possible solutions to problems regarding the installation and operation of the Cable/DSL Router. If your situation is described here, the problem should be solved by applying the corresponding solution. If you can’t find an answer here, check the Linksys website at www.linksys.com.

1. I can’t connect to the Cable/DSL Router.

• Ensure that the Cable/DSL Router is properly installed, LAN connections are OK, and it is powered ON.

• Ensure that your PC and the Cable/DSL Router are on the same network segment. If you are not sure, initiate the DHCP function, and let the PC get the IP address automatically.

• Ensure that your PC is using an IP address within the default range of

192.168.1.2 to 192.168.1.254 and thus compatible with the Cable/DSL Router default IP Address of 192.168.1.1

• Also, the Subnet Mask should be set to 255.255.255.0 to match the Cable/DSL Router. For the Cable/DSL Router, you can check these settings by using Control Panel-Network to check the Properties for the TCP/IP protocol.

2. The Diag LED stays lit when it shouldn’t.

• The Diag LED lights up when the device is first powered up. Meantime, the system will boot up itself and check for proper operation. After finishing the checking procedure, the LED turns off to show the system is working fine. If the LED remains lit after this time, the device is not working properly. Try to re-flash the fir mware by assigning a static IP address to the computer, and then upgrade the f irmware again. If that doesn’t help, contact your dealer for further inspection.

3. I can’t browse through the Cable/DSL Router.

• Check if both ends of the network cable and power adapter are properly connected. Check if the front panel’s status LEDs are working properly.

• If using Windows 95 or Windows 98, check the TCP/IP setup on the client side. Run winipcfg by clicking on the Start button, selecting Run, and typing winipcfg in the Run box. Then press Enter. The PC should have an IP address of 192.168.1.xxx (“xxx” is from 2 to 254.) The Subnet Mask is 255.255.255.0; the default gateway IP should be the Router’s IP Address, and check that the DNS is correct.

• Same as above, check the same setup values on the Status Monitor page of the Cable/DSL Router.

MAC Address Clone

Clicking on the “MAC Address” tab (next to WAN IP Address) displays your Router's MAC address, which is a 12-digit code assigned to a unique piece of hardware for identification, like a Social Security number. Some ISPs require that you register the MAC address of your network card/adapter that is connected to your cable or DSL modem during installation. If your ISPs require MAC address registration, find your adapter’s MAC address by doing the following:

• If you are running Windows 98:

Click the Start button, and select Run. Type “command,” and press the Enter key. At the DOS prompt, type “winipcfg.”

• If you are running Windows 2000 or Millennium:

Click the Start button, and select Run. Type “command,” and press the Enter key. At the DOS prompt, type “ipconfig/all. ” The “Physical Address” with 12 digits is your Router’s MAC address.

Enter those 12 digits into the fields below , and click the A ppl ybutton. This “clones” your network adapter’s MAC address onto your Router, and prevents you from having to call your ISP to change the registered MAC address to the Router’s MAC address.

Note: This is a sample screen.

Please enter the MAC Address for your Network Card/Adapter into this field.

EtherFast®Cable/DSL Routers

Instant Broadband™Series

Frequently Asked Questions

How do I remove my DUN prompt for PPPoE? For Microsoft Internet Explorer

5.x or above, perform the following steps:

1. Right-click on the Internet Explorer icon on the desktop, and click Properties.

2. Click the Configuration tab.

3. In “Choose settings if you need to configure a proxy server for a con- necction,” select the option, “Never dial a connection.” Then click OK.

What is the maximum number of IP addresses that the Cable/DSL Router will

support? The Router will support up to 253 IP addresses.

Is IPSec Pass-Thru supported by the Router?Yes, it is a built-in feature that the

router automatically enables.

Where is the Cable/DSL Router installed on the network? In a typical environ-

ment, the Router is installed between the Cable/DSL Modem and the LAN. Plug the Cable/DSL Router into the Cable/DSL Modem’s Ethernet por t.

Does the Cable/DSL Router support IPX or AppleTalk? No. TCP/IP is the only

protocol standard for the Internet and has become the global standard for communications. IPX, a NetWare communications protocol used only to route messages from one node to another, and AppleTalk, a communications protocol used on Apple and Macintosh networks, can be used from LAN to LAN connections, but those protocols cannot connect from WAN to LAN.

Does the WAN connection of the Cable/DSL Router support 100Mb Ethernet?

Because of the speed limitations of broadband Internet connections, the Cable/DSL Router’s current hardware design supports 10Mb Ethernet on its WAN port. It does, of course, support 100Mbps over the auto-sensing Fast Ethernet 10/100 switch on the LAN side of the router.

What is Network Address Translation and what is it used for? Network

Address Translation (NAT) translates multiple IP addresses on the private LAN to one public address that is sent out to the Internet. This adds a level of security since the address of a PC connected to the private LAN is never transmitted on the Internet. Furthermore, NAT allows the Cable/DSL Router to be used with low cost Internet accounts, such as DSL or cable modems, when only one TCP/IP address is provided by the ISP. The user may have many private addresses behind this single address provided by the ISP.

4. When I enter a URL or IP address,I get a time out error.

• Check if other PCs work. If they do, ensure that your workstations IP settings are correct (IP address, Subnet Mask, Default gateway and DNS)

• If the PCs are configured cor rectly, but still not working, check the Cable/DSL Router. Ensure that it is connected and ON. Connect to it and check its settings. (If you cannot connect to it, check the LAN and power connections.)

• If the Cable/DSL Router is configured cor rectly, check your Internet connection (DSL/Cable modem, etc.) to see that it is working correctly.

• Manually configure the TCP/IP with a DNS address provided by your ISP.

5. I can’t obtain an IP address from my cable or DSL modem.

• Ensure that all of your cabling is properly connected and that all of the router’s WAN and LAN LEDs are correctly illuminated.

• Power down your cable or DSL modem for a few seconds. Turn it back on. After the modem goes through its self-test, check to see if you now have an IP address.

• Ensure that your cable or DSL modem is DHCP-capable.

• You may have to enter the router or host name in the Setup page of the Router’s web-based utility. Go to the Setup section of the Web-based Utility for more information.

• Your ISP may require Mac addresses. Check with your ISP. This address can be obtained in the Status screen of the Router’s Web-based Utility.

6. I can’t access my e-mail or the Internet.

• Some ISPs, especially cable providers, configure their networks so that you don’t have to enter a full Internet address into your web browser or e-mail application to reach your home page or receive your e-mail.

• If your Internet home page address is something very simple, such as “www”, instead of “www.linksys.com,” or your e-mail server’s address is something like “e-mail” or “pop3,” instead of “pop.mail.linksys.com,” you won’t be able to properly configure your Cable/DSL Router until you determine the actual Internet addresses of your Web and e-mail connections.

• You must obtain this information before connecting the Router to your network. To do so, you can ask your ISP, or turn to page 75 to lear n how to find this data yourself by “pinging” your Router for an IP address.

EtherFast®Cable/DSL Routers

Instant Broadband™Series

The web page hangs; downloads are corrupt, or nothing but junk characters are

being displayed on the screen. What do I need to do? Force your NIC to

10Mbps or half duplex mode, and turn off the “Auto-negotiate” feature of your NIC as a temporary measure. (Please look at the Network Control Panel, in your Ethernet Adapter’s Advanced Properties tab.). Make sure that your proxy setting is disabled in the browser. Check our website at www.linksys.com for more information.

If all else fails in the installation, what can I do? Reset the router by holding

down the reset button for at least three seconds and reset your cable or DSL modem by powering the unit off and then on. Obtain and flash the latest fir mware release that is readily available on the Linksys website, www.linksys.com.

How will I be notified of new router firmware upgrades? All Linksys firmware

upgrades are posted on the Linksys website at www.linksys.com, where they can be downloaded for free. The router's firmware can be upgraded with TFTP programs. If your Router’s Internet connection is working well, there is no need to download a newer firmware version, unless that version contains new features that you would like to use. Downloading a more current version of Router firmware will not enhance the quality or speed of your Internet connection, and may disrupt your current connection stability.

Does the Cable/DSL Router support IPsec? A new IPsec Pass Through features

is now available in firmware versions 1.30 and later, which can be downloaded at www.linksys.com.

Will the router function in a Macintosh environment? Yes, but the router’s setup

pages are accessible only through Internet Explorer v4.0 or Netscape Navigator v4.0 or higher for Macintosh.

With which type of firewall is the router equipped? The Cable/DSL Wireless-

Ready Router uses NAT and TCP/IP port inspections.

I am not able to get the web configuration screen for the Router. What can I do?

You may have to remove the proxy settings on your Internet browser, e.g., Netscape Navigator or Internet Explorer. Or remove the dial-up settings on your browser. Check with your browser documentation.

What is DMZ Hosting? Demilitarized Zone (DMZ) allows one IP address

(computer) to be exposed to the Internet. Some applications require multiple TCP/IP ports to be open. It is recommended that you set your computer with a static IP if you want to use DMZ Hosting.

Does the Cable/DSL Router support any operating system other than Windows

95,Windows 98, Windows 2000,Windows NT,or Windows XP? Yes, but

Linksys does not, at this time, provide technical support for setup, configuration or troubleshooting of any non-Windows operating systems.

Does the Cable/DSL router support ICQ send file? Yes, with the following f ix:

ICQ menu-> preference -> connections tab-> check “I am behind a firewall or proxy,” and set the firewall time-out to 80 seconds in firewall setting. The Internet user can then send a f ile to a user behind the router.

How do I get Napster to work with the Router? Napster is fully compatible

with the Router, but you must make sure that, during installation, you select “no idea” when asked about your firewall selection. Set your proxy settings to “No Proxy Server” in your File>Preferences.

I set up an Unreal Tournament Server,but others on the LAN cannot join. What do

I need to do? If you have a dedicated Unreal Tournament server running,

you need to create a static IP for each of the LAN computers and forward ports 7777, 7778, 7779, 7780, 7781, and 27900 to the IP address of the server. If you want to use the UT Server Admin, forward another port (8080 usually works well), and then in the [UWeb.WebServer] section of the server.ini file, set the ListenPort to 8080 (to match the mapped port above) and ServerName to the IP assigned to the router from your ISP.

Can multiple gamers on the LAN get on one game server and play simultaneous-

ly with just one public IP address? It depends on which network game or

what kind of game server you are using. For example, Unreal Tournament supports multi-login with one public IP.

How do I get

Half-Life:Team Fortress

to work with the Router? The default

client port for Half-Life is 27005. The computers on your LAN need to have “+clientport 2700x” added to the HL shortcut command line; the x would be 6, 7, 8, and on up. This lets multiple computers connect to the same server. One problem: Version 1.0.1.6 won’t let multiple computers with the same CD key connect at the same time, even if on the same LAN (not a problem with 1.0.1.3). As far as hosting games, the HL server does not need to be in the DMZ. Just forward port 27015 to the local IP of the server computer. There remains, however, a problem with people being booted after a few minutes with an “illegible server message.”

How can I block corrupted FTP downloads? If you are experiencing corrupted files

when you do wnload a file with your FTP client, try using another FTP program.

EtherFast®Cable/DSL Routers

Glossary

10BaseT - An Ethernet standard that uses twisted wire pairs.

100BaseTX - IEEE physical lay er specification for 100 Mbps over two pairs of

Category 5 UTP or STP wire.

1000BASE-T - Provides half-duplex (CSMA/CD) and full-duplex 1000 Mbps Ethernet service over Category 5 links as defined by ANSI/TIA/EIA-568-A. Topology rules for 1000BASE-T are the same as those used for 100BASE-T. Category 5 link lengths are limited to 100 meters by the ANSI/TIA/EIA-568A cabling standard. Only one CSMA/CD repeater will be allowed in a collision domain.

Adapter - Printed circuit board that plugs into a PC to add to capabilities or connectivity to a PC. In a networked environment, a network interface card (NIC) is the typical adapter that allows the PC or server to connect to the intranet and/or Internet.

Auto-negotiate - To automatically determine the correct settings. The term is often used with communications and networking. For example, Ethernet 10/100 cards, hubs, and switches can determine the highest speed of the node they are connected to and adjust their transmission rate accordingly.

Backbone – The part of a network that connects most of the systems and networks together and handles the most data.

Bandwidth - The transmission capacity of a given facility, in terms of how much data the facility can transmit in a fixed amount of time; expressed in bits per second (bps).

Bit – A binary digit. The value—0 or 1—used in the binary numbering system. Also, the smallest form of data.

Boot – To cause the computer to start executing instructions. Personal computers contain built-in instructions in a ROM chip that are automatically executed on startup. These instructions search for the operating system, load it, and pass control to it.

Bottleneck – A traf fic slowdo wn that results w hen too many network nodes try to access a single node, often a server node, at once.

Bridge - A device that interconnects different networks together.

Instant Broadband™Series

If DMZ Hosting is used, does the exposed user share the public IP with the

Router? No.

Does the Router pass PPTP packets or actively route PPTP sessions? The router

allows PPTP packets to pass through.

Is the Router cross-platform compatible? Any platform that supports Ethernet

and TCP/IP is compatible with the router.

How many ports can be simultaneously forwarded? Theoretically, the router

can establish 520 sessions at the same time, but you can only forward 10 ranges of ports.

Does the Router replace a modem? Is there a cable or DSL modem in the

Router? No, this version of the router must work in conjunction with a

cable or DSL modem.

Which modems are compatible with the Router? The router is compatible with

virtually any cable or DSL modem that supports Ethernet.

What are the advanced features of the Router? The Router's advanced features

include IP Filtering, IP Forwarding, Dynamic Routing, Static Routing, DMZ hosting, and MAC Address Cloning.

What is the maximum number of VPN sessions allowed by the Router?

One VPN session at a time.

How big is the memory buffer on the Router? 512KB. How can I check whether I have static or DHCP IP Addresses? Consult your ISP

to obtain this information.

How do I get mIRC to work with the Router? Under the Forwarding tab, set port

forwarding to 113 for the PC on which you are using mIRC.

If your questions are not addressed here, refer to the contact information

on the last page of this manual.

EtherFast®Cable/DSL Routers

CSMA/CD (Carrier Sense Multiple Access/Collision Detection) - The LAN access method used in Ethernet. When a device wants to gain access to the network, it checks to see if the network is quiet (senses the carrier). If it is not, it waits a random amount of time before retrying. If the network is quiet and two devices access the line at exactly the same time, their signals collide. When the collision is detected, they both back off and each waits a random amount of time before retrying.

Daisy Chain - Connected in series, one after the other. Transmitted signals go to the first device, then to the second, and so on.

Database - A database is a collection of data that is organized so that its contents can easily be accessed, managed, and updated.

Data Packet - One frame in a packet-switched message. Most data communications is based on dividing the transmitted message into packets. F or e xample, an Ethernet packet can be from 64 to 1518 bytes in length.

Default Gateway - The routing device used to forward all traffic that is not addressed to a station within the local subnet.

DHCP (Dynamic Host Configuration Protocol) - A protocol that lets network administrators centrally manage and automate the assignment of Internet Protocol (IP) addresses in an organization's network. Using the Internet’s set of protocol (TCP/IP), each machine that can connect to the Internet needs a unique IP address. When an organization sets up its computer users with a connection to the Internet, an IP address must be assigned to each machine. Without DHCP, the IP address must be entered manually at each computer and , if computers move to another location in another part of the network, a new IP address must be entered. DHCP lets a network administrator supervise and distribute IP addresses from a central point and automatically sends a new IP address when a computer is plugged into a different place in the network.

DHCP uses the concept of a “lease” or amount of time that a given IP address will be valid for a computer. The lease time can vary depending on how long a user is likely to require the Internet connection at a particular location. It’s especially useful in education and other environments where users change frequently. Using very short leases, DHCP can dynamically reconfigure networks in which there are more computers than there are available IP addresses.

DHCP supports static addresses for computers containing Web servers that need a permanent IP address.

Instant Broadband™Series

Broadband - A data-transmission scheme in which multiple signals share the bandwidth of a medium. This allows the transmission of voice, data, and video signals over a single medium. Cable television uses broadband techniques to deliver dozens of channels over one cable.

Browser - A browser is an application program that provides a way to look at and interact with all the information on the World Wide Web or PC. The word “browser” seems to have originated prior to the Web as a generic term for user interfaces that let you browse text files online.

Cable Modem - A device that connects a computer to the cable television network, which in turn connects to the Internet. Once connected, cable modem users have a continuous connection to the Internet. Cable modems feature asymmetric transfer rates: around 36 Mbps downstream (from the Internet to the computer), and from 200 Kbps to 2 Mbps upstream (from the computer to the Internet).

CAT 3 - ANSI/EIA (American National Standards Institute/Electronic Industries Association) Standard 568 is one of several standards that specify “categories” (the singular is commonly referred to as “CAT”) of twisted pair cabling systems (wires, junctions, and connectors) in terms of the data rates that they can sustain. CAT 3 cable has a maximum throughput of 16 Mbps and is usually utilized for 10BaseT networks.

CAT 5 - ANSI/EIA (American National Standards Institute/Electronic Industries Association) Standard 568 is one of several standards that specify “categories” (the singular is commonly referred to as “CAT”) of twisted pair cabling systems (wires, junctions, and connectors) in terms of the data rates that they can sustain. CAT 5 cable has a maximum throughput of 100 Mbps and is usually utilized for 100BaseTX networks.

CA T 5e- The additional cabling performance parameters of return loss and farend crosstalk (FEXT) specified for 1000BASE-T and not specified for 10BASE-T and 100BASE-TX are related to differences in the signaling implementation. 10BASE-T and 100BASE-TX signaling is unidirectional—signals are transmitted in one direction on a single wire pair. In contrast, Gigabit Ethernet is bi-directional—signals are transmitted simultaneously in both directions on the same wire pair; that is, both the transmit and receive pair occupy the same wire pair.

CPU (Central Processing Unit) - The computing part of the computer. Also called the “processor,” it is made up of the control unit and ALU.

EtherFast®Cable/DSL Routers

Ethernet - IEEE standard network protocol that specifies how data is placed on and retrieved from a common transmission medium. Has a transfer rate of 10 Mbps. Forms the underlying transport vehicle used by several upper-level protocols, including TCP/IP and XNS.

Fast Ethernet - A 100 Mbps technology based on the 10Base-T Ethernet CSMA/CD network access method.

Firewall - A firewall is a set of related programs, located at a network gateway server, that protects the resources of a netw ork from users from other networks. (The term also implies the security policy that is used with the programs.) An enterprise with an intranet that allows its workers access to the wider Internet installs a firewall to prevent outsiders from accessing its own private data resources and for controlling what outside resources to which its own users have access.

Basically, a firewall, working closely with a router, examines each network packet to determine whether to forward it toward its destination.

Firmware - Programming that is inserted into programmable read-only memory, thus becoming a permanent part of a computing device.

Fragmentation - Breaking a packet into smaller units when transmitting over a network medium that cannot support the original size of the packet.

FTP (File Transfer Protocol) - A protocol used to transfer files over a TCP/IP network (Internet, UNIX, etc.). F or example, after de v eloping the HTML pages for a website on a local machine, they are typically uploaded to the Web server using FTP.

FTP includes functions to log onto the network, list directories, and copy files. It can also convert betw een the ASCII and EBCDIC character codes. FTP operations can be performed by typing commands at a command prompt or via an FTP utility running under a graphical interface such as Windows. FTP transfers can also be initiated from within a Web browser by entering the URL preceded with ftp://.

Unlike e-mail programs in which graphics and program files have to be “attached,” FTP is designed to handle binary files directly and does not add the overhead of encoding and decoding the data.

Instant Broadband™Series

DMZ - (Demilitarized Zone) allows one IP address (or computer) to be exposed to the Internet. Some applications require multiple TCP/IP ports to be open. It is recommended that you set your computer with a static IP address if you want to use DMZ Hosting.

DNS - The Domain Name System (DNS) is the way that Internet domain names are located and translated into Internet Protocol (IP) addresses. A domain name is a meaningful and easy-to-remember “handle” for an Internet address.

Domain - A subnetwork comprised of a group of clients and servers under the control of one security database. Dividing LANs into domains improves performance and security.

Download - To receive a file transmitted over a network. In a communications session, download means receive, and upload means transmit.

Driver - A workstation or server software module that provides an interface between a netw ork interface card and the upper-la y er protocol softw are running in the computer; it is designed for a specific NIC, and is installed during the initial installation of a network-compatible client or server operating system.

DSSS (Direct-Sequence Spread-Spectr um) - DSSS generates a redundant bit pattern for each bit to be transmitted. This bit pattern is called a chip (or chipping code). The longer the chip, the greater the probability that the original data can be recovered. Even if one or more bits in the chip are damaged during transmission, statistical techniques embedded in the radio can recover the original data without the need for retransmission. To an unintended receiver, DSSS appears as low power wideband noise and is rejected (ignored) by most narrowband receivers.

Dynamic IP Address - An IP address that is automatically assigned to a client station in a TCP/IP network, typically by a DHCP server. Network devices that serve multiple users, such as servers and printers, are usually assigned static IP addresses.

Dynamic Routing - The ability for a router to forw ard data via a dif ferent route based on the current conditions of the communications circuits. For example, it can adjust for overloaded traffic or failing lines and is much more flexible than static routing, which uses a fixed forwarding path.

EtherFast®Cable/DSL Routers

IPCONFIG - A utility that provides for querying, def ining and managing IP addresses within a network. A commonly used utility, under Windows NT and 2000, for configuring networks with static IP addresses.

IPSec - IPSec (Inter net Protocol Security) is a developing standard for security at the network or packet processing layer of network communication. A big advantage of IPSec is that security arrangements can be handled without requiring changes to individual user computers.

IRQ (Inter rupt ReQuest) - A hardware interrupt on a PC. There are 16 IRQ lines used to signal the CPU that a peripheral event has started or terminated. Except for PCI devices, two devices cannot use the same line.

ISP - An ISP (Internet service provider) is a company that provides individuals and companies access to the Internet and other related services such as website building and virtual hosting.

LAN - A local area network (LAN) is a group of computers and associated devices that share a common communications line and typically share the resources of a single processor or server within a small geographic area (for example, within an office building).

Latency - The time dela y between when the first bit of a packet is received and the last bit is forwarded.

MAC Address - The MAC (Media Access Control) address is a unique number assigned by the manufacturer to any Ethernet networking device, such as a network adapter, that allows the network to identify it at the hardware level.

Mbps (MegaBits Per Second) - One million bits per second; unit of measurement for data transmission.

mIRC - mIRC runs under Windows and provides a graphical interface for logging onto IRC servers and listing, joining, and leaving channels.

Motherboard - A motherboard is the physical arrangement in a computer that contains the computer’s basic circuitry and components.

NAT - NAT (Network Address Translation) is the translation of an Internet Protocol address (IP address) used within one network to a different IP address known within another network. One network is designated the inside network and the other is the outside.

Instant Broadband™Series

Full Duplex - The ability of a device or line to transmit data simultaneously in both directions.

Gateway – A device that interconnects networks with different, incompatible communications protocols.

Half Duplex - Data transmission that can occur in two directions over a single line, but only one direction at a time.

Hardware - Hardware is the physical aspect of computers, telecommunications, and other information technology devices. The term arose as a wa y to distinguish the “box” and the electronic circuitry and components of a computer from the program you put in it to make it do things. The program came to be known as the software.

Hub - The device that serves as the central location for attaching wires from workstations. Can be passive, where there is no amplification of the signals; or active, where the hubs are used like repeaters to provide an extension of the cable that connects to a workstation.

IEEE - The Institute of Electrical and Electronics Engineers. The IEEE describes itself as “the world's largest technical professional society—promoting the development and application of electrotechnology and allied sciences for the benefit of humanity, the advancement of the profession, and the wellbeing of our members.”

The IEEE fosters the development of standards that often become national and international standards. The organization publishes a number of journals, has many local chapters, and has several lar ge societies in special areas, such as the IEEE Computer Society.

IP Address - In the most widely installed level of the Internet Protocol (Internet Protocol) today, an IP address is a 32-binary digit number that identifies each sender or receiver of information that is sent in packets across the Internet. When you request an HTML page or send e-mail, the Internet Protocol part of TCP/IP includes your IP address in the message (actually, in each of the packets if more than one is required) and sends it to the IP address that is obtained by looking up the domain name in the Uniform Resource Locator you requested or in the e-mail address you're sending a note to. At the other end, the recipient can see the IP address of the Web page requestor or the e-mail sender and can respond by sending another message using the IP address it received.

EtherFast®Cable/DSL Routers

Partitioning - To divide a resource or application into smaller pieces.

PCI (Peripheral Component Interconnect) - A peripheral bus commonly used

in PCs, Macintoshes and workstations. It was designed primarily by Intel and first appeared on PCs in late 1993. PCI provides a high-speed data path between the CPU and peripheral devices (video, disk, network, etc.). There are typically three or four PCI slots on the motherboard. In a Pentium PC, there is generally a mix of PCI and ISA slots or PCI and EISA slots. Early on, the PCI bus was known as a “local bus.”

PCI provides “plug and play” capability, automatically configuring the PCI cards at startup. When PCI is used with the ISA bus, the only thing that is generally required is to indicate in the CMOS memory which IRQs are already in use by ISA cards. PCI takes care of the rest.

PCI allows IRQs to be shared , w hich helps to solve the prob lem of limited IRQs available on a PC. For example, if there were only one IRQ left over after ISA devices were gi v en their required IRQs, all PCI devices could share it. In a PCIonly machine, there cannot be insufficient IRQs, as all can be shared.

PCMCIA - The PCMCIA (Personal Computer Memory Card International Association) is an industry group organized in 1989 to promote standards for a credit card-size memory or I/O device that would fit into a personal computer, usually a notebook or laptop computer.

Ping (Packet INternet Groper) - An Internet utility used to determine whether a particular IP address is online. It is used to test and debug a network by sending out a packet and waiting for a response.

Plug-and-Play - The ability of a computer system to configure expansion boards and other devices automatically without requiring the user to turn off the system during installation.

Port - A pathway into and out of the computer or a network device such as a switch or router. For example, the serial and parallel ports on a personal computer are external sockets for plugging in communications lines, modems, and printers.

Port Mirroring - Port mirroring, also known as a roving analysis port, is a method of monitoring network traffic that forwards a copy of each incoming and outgoing packet from one port of a network switch to another port where the packet can be studied. A network administrator uses port mirroring as a

Instant Broadband™Series

NetBEUI (NetBIOS Extended User Interface) - The transport layer for NetBIOS. NetBIOS and NetBEUI were originally part of a single protocol suite that was later separated. NetBIOS sessions can be transported over NetBEUI, TCP/IP, and SPX/IPX protocols.

NetBIOS - The native networking protocol in DOS and Windows networks. Although originally combined with its transport layer protocol (NetBEUI), NetBIOS today provides a programming interface for applications at the session layer (layer 5). NetBIOS can ride over NetBEUI, its native transport, which is not routable, or over TCP/IP and IPX/SPX, which are routable protocols.

NetBIOS computers are identified by a unique 15-character name, and Windows machines (NetBIOS machines) periodically broadcast their names over the network so that Network Neighborhood can catalog them. For TCP/IP networks, NetBIOS names are turned into IP addresses via manual configuration in an LMHOSTS file or a WINS server.

There are two NetBIOS modes. The Datagram mode is the fastest mode, but does not guarantee delivery. It uses a self-contained packet with send and receive name, usually limited to 512 bytes. If the recipient device is not listening for messages, the datagram is lost. The Session mode establishes a connection until broken. It guarantees delivery of messages up to 64KB long.

Network - A system that transmits any combination of voice, video, and/or data between users.

Network Mask - also known as the “Subnet Mask.” NIC (Network Interface Card) - A board installed in a computer system, usu-

ally a PC, to pro vide netw ork communication capabilities to and from that computer system. Also called an adapter.

Notebook (PC) - A notebook computer is a battery-powered personal computer generally smaller than a briefcase that can easily be transported and conveniently used in temporary spaces such as on airplanes, in libraries, at temporary offices, and at meetings. A notebook computer, sometimes called a laptop computer, typically weighs less than five pounds and is three inches or less in thickness.

Packet Filtering - Discarding unwanted network traffic based on its originating address or range of addresses or its type (e-mail, file transfer, etc.).

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control programs such as the operating system and database management system (DBMS). Application software is any program that processes data for the user.

A common misconception is that software is data. It is not. Software tells the hardware how to process the data.

SOHO (Small Office/Home Office) - Market segment of professionals who work at home or in small offices.

Static IP Address - A permanent IP address that is assigned to a node in a TCP/IP network.

Static Routing - Forwarding data in a network via a fixed path. Static routing cannot adjust to changing line conditions as can dynamic routing.

Storage - The semi-permanent or permanent holding place for digital data.

STP (Shielded Twisted Pair) - Telephone wire that is wrapped in a metal sheath

to eliminate external interference.

Subnet Mask - The method used for splitting IP networks into a series of subgroups, or subnets. The mask is a binary pattern that is matched up with the IP address to turn part of the host ID address field into a field for subnets.

Swapping - Replacing one segment of a program in memory with another and restoring it back to the original when required.

Switch – 1. A data switch connects computing devices to host computers, allowing a large number of devices to share a limited number of ports. 2. A device for making, breaking, or changing the connections in an electrical circuit.

TCP (Transmission Control Protocol) - A method (protocol) used along with the Internet Protocol (Internet Protocol) to send data in the form of message units between computers over the Internet. While IP takes care of handling the actual delivery of the data, TCP takes care of keeping track of the individual units of data (called packets) that a message is divided into for efficient routing through the Internet.

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diagnostic tool or debugging feature, especially when fending off an attack. It enables the administrator to keep close track of switch performance and alter it if necessary. Port mirroring can be managed locally or remotely.

PPPoE(Point to Point Protocol o v er Ethernet) - A method used mostly by DSL providers for connecting personal computers to a broadband modem for Internet access. It is similar to how a dial-up connection works but at higher speeds and quicker access.

PPTP (Point-to-Point Tunneling Protocol) - A protocol (set of communication rules) that allows corporations to extend their own corporate network through private “tunnels” o ver the public Internet. Ef fectivel y, a corporation uses a wide-area network as a single large local area network. A compan y no longer needs to lease its own lines for wide-area communication but can securely use the public networks. This kind of interconnection is known as a virtual priv ate network (VPN).

PrintServer - A hardware device that enables a printer to be located anywhere in the network.

RIP (Routing Information Protocol) - A simple routing protocol that is part of the TCP/IP protocol suite. It determines a route based on the smallest hop count between source and destination. RIP is a distance vector protocol that routinely broadcasts routing information to its neighboring routers and is known to waste bandwidth. AppleTalk, DECnet, TCP/IP, NetWare, and VINES all use incompatible versions of RIP.

RJ-11 (Registered Jack-11) - A telephone connector that holds up to six wires. The RJ-11 is the common connector used to plug a telephone into a wall.

RJ-45 - A connector similar to a telephone connector that holds up to eight wires, used for connecting Ethernet devices.

Router - Protocol-dependent device that connects subnetworks together. Routers are useful in breaking down a very large network into smaller subnetworks; they introduce longer delays and typically have much lower throughput rates than bridges.

Server - Any computer whose function in a network is to provide user access to files, printing, communications, and other ser vices.

Software- Instructions for the computer. A series of instructions that performs a particular task is called a “program.” The two major cate gories of softw are are “system software” and “application software.” System software is made up of

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VLAN (Virtual LAN) - A logical association that allows users to communicate as if they were physically connected to a single LAN, independent of the actual physical configuration of the network.

Virtual Server - Multiple servers that appear as one server, or one system image, to the operating system or for network administration.

Wake-on-LAN - Wake on LAN is a technology that allows a network professional to remotely power on a computer or to wake it up from sleep mode.

WAN - A communications network that covers a wide geographic area, such as a state or country.

WEP (Wired Equivalent Privacy) - A data privacy mechanism based on a 64bit shared key algorithm, as described in the IEEE 802.11 standard.

WINIPCFG - Configuration utility based on the Win32 API for querying, defining, and managing IP addresses within a network. A commonly used utility for configuring networks with static IP addresses.

Workgroup - Two or more individuals that share files and databases.

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TCP/IP - Transmission Control Protocol/Internet Protocol (TCP/IP) is the basic communication language or protocol of the Internet. It can also be used as a communications protocol in a private network (either an intranet or an extranet). When you are set up with direct access to the Internet, your computer is provided with a copy of the TCP/IP program just as every other computer that you may send messages to or get information from also has a copy of TCP/IP.

TFTP (Trivial File Transfer Protocol) - A version of the TCP/IP FTP protocol that has no directory or password capability.

Throughput- The amount of data moved successfull y from one place to another in a given time period.

Topology - A network’s topology is a logical characterization of how the devices on the network are connected and the distances between them. The most common network devices include hubs, switches, routers, and gateways. Most large networks contain several levels of interconnection, the most important of which include edge connections, backbone connections, and wide-area connections.

TX Rate – Transmission Rate.

Upgrade - To replace existing software or firmware with a newer version.

Upload - To send a file transmitted over a network. In a communications ses-

sion, upload means transmit, and download means receive.

URL (Uniform Resource Locator) - The address that defines the route to a file on the Web or any other Internet facility. URLs are typed into the browser to access Web pages, and URLs are embedded within the pages themselves to provide the hypertext links to other pages.

UTP - Unshielded twisted pair is the most common kind of copper telephone wiring. Twisted pair is the ordinary copper wire that connects home and many business computers to the telephone company. To reduce crosstalk or electromagnetic induction between pairs of wires, two insulated copper wires are twisted around each other. Each signal on twisted pair requires both wires. Since some telephone sets or desktop locations require multiple connections, twisted pair is sometimes installed in two or more pairs, all within a single cable.

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Instant Broadband™Series

Step One: Pinging an IP Address

The first step to deter mining your ISP’s web and e-mail server address is to ping its IP address.

1. Power on the computer and the cable or DSL modem, and restore the

network configuration set by your ISP if you have since changed it.

2. Click Start, then Run, and type “command.” This will bring up the DOS

window.

3. At the DOS command prompt, type “ping mail” (assuming that the

location for which you’re trying to find an IP address is configured as “mail”). Press Enter. Information such as the following data, taken from a ping of Microsoft Network’s e-mail server, will be displayed.

C:\>ping mail

Pinging mail [24.53.32.4] with 32 bytes of data:

Reply from 24.53.32.4: bytes=32 time<10ms TTL=128 Reply from 24.53.32.4: bytes=32 time<10ms TTL=128 Reply from 24.53.32.4: bytes=32 time<10ms TTL=128 Reply from 24.53.32.4: bytes=32 time<10ms TTL=128

Ping statistics for 24.53.32.4:

Packets: Sent = 4, Received = 4, Lost = 0 (0%

loss),

Approximate round trip times in milli-seconds:

Minimum = 0ms, Maximum = 0ms, Average = 0ms

4. Write down the IP address returned by the ping command. (In the

example above: 24.53.32.4.) This IP address is the actual IP address of the server “mail,” or any other word or value you have pinged.

Appendix

How to Ping Your ISP’s E-mail & Web Addresses

Virtually all Internet addresses are configured with words or characters (i.e., www.linksys.com, www.yahoo.com, etc.) In actuality, however, these Internet addresses are assigned to IP addresses, which are the true addresses on the Internet. For example, www.linksys.com is actually 216.23.162.142. Type it into your web browser and you will wind up at the Linksys home page every time.

IP and web addresses, however, can sometimes be long and hard to remember. Because of this, certain ISPs will shorten their server addresses to single words or codes on their users’web browser or e-mail configurations. If your ISP’s e-mail and web server addresses are configured with single words (“www,” “e-mail,” “home,” “pop3,” etc.) rather than whole Internet addresses or IP addresses, your Router may have problems sending or receiving mail and accessing the Internet. This happens because your Router has not been configured by your ISP to accept their abbreviated server addresses.

The solution is to determine the true web addresses behind your ISPs code words. You can determine the IP and web addresses of your ISP’s ser vers by “pinging” them.

If you don’t have your ISP’s web and e-mail IP addresses, you must either get them from your ISP or follow these steps prior to connecting your Cable/DSLRouter to your network.

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Instant Broadband™Series

Installing the TCP/IP Protocol

Follow these instructions to install the TCP/IP protocol on one of your PCs only after a network card has been successfully installed inside the PC. These instructions are for Windows 95, Windows 98, and Windows ME. For TCP/IP setup under Windows NT, see your Windows NT manual.

1. Click the Start button. Choose Settings and then Control Panel.

2. Double-click on the Network icon to bring up your Network window. Select the Configuration tab.

3. Click the Add button.

4. Double-click on Protocol.

5. Highlight Microsoft under the list of manufacturers.

Step T w o:Pinging for a Web Address

While the IP address returned above would work as your e-mail server address, it may not be permanent. IP addresses change all the time. Web addresses, however, usually don’t. Because of this, you’re likely to have fewer problems by configuring your system with web addresses rather than IP addresses. Follow the instructions below to find the web address assigned to the IP address you just pinged.

1. At the DOS command prompt, type “ping -a 24.53.32.4,” where

24.53.32.4 is the IP address you just pinged. Information such as the following data will be displayed.

C:\>ping -a 24.53.32.4

Pinging mail.msnv3.occa.home.com [24.53.32.4] with

32 bytes of data:

Reply from 24.53.32.4: bytes=32 time<10ms TTL=127 Reply from 24.53.32.4: bytes=32 time<10ms TTL=127 Reply from 24.53.32.4: bytes=32 time<10ms TTL=127 Reply from 24.53.32.4: bytes=32 time<10ms TTL=127

Ping statistics for 24.53.32.4:

Packets: Sent = 4, Received = 4, Lost = 0 (0%

loss),

Approximate round trip times in milli-seconds:

Minimum = 0ms, Maximum = 0ms, Average = 0ms

2. Write down the web address returned by the ping command (In the

example above: mail.msnv3.occa.home.com.). This web address is the web address assigned to the IP address you just pinged. While the IP address of “mail” could conceivably change, it is likely that this web address will not.

3. Replace your ISP’s abbreviated server address with this extended web

address in the corresponding Internet application (web browser, e-mail application, etc.).

Once you have replaced the brief server address with the true server address, your Router should have no problem accessing the Internet through that Internet application.

EtherFast®Cable/DSL Routers

Instant Broadband™Series

Twisted-Pair Cabling

There are different grades, or “categories,” of twisted-pair cabling. Category 5 is the most reliable and most highly recommended. Category 3 is a good second choice. Straight-through cables are used for connecting computers to a hub. Crossover cables are used for connecting a hub to another hub (there is an exception: some hubs have a built-in uplink port that is crossed internally; this allows you to link or connect hubs together with a straight-through cable instead).

You can buy pre-made Category 5 cables, or cut and crimp your own. Category 5 cables can be purchased or crimped as either straight-through or crossover. Inside a Category 5 cable are eight thin, color-coded wires inside that run from one end of the cable to the other. All eight wires are used. In a straight-through cable, wires 1, 2, 3, and 6 at one end of the cable are also wires 1, 2, 3, and 6 at the other end. In a crossover cable, the order of the wires change from one end to the other: wire 1 becomes 3, and 2 becomes 6. See the diagrams on the next page for more detailed information on straight-

through and crossover cabling.

To determine which wire is wire number 1, hold the cable so that the end of the plastic RJ-45 tip (the part that goes into a wall jack first) is facing away from you. Face the clip down so that the copper side faces up (the springy clip will now be parallel to the floor). When looking down on the copper side, wire 1 will be on the far left.

6. Find and double-click TCP/IP in the list to the right (below).

7. After a few seconds, the main Network window will appear. The TCP/IP Protocol should now be listed.

8. Click the OK button. Windows may ask for original Windows installation files. Supply them as needed, e.g., c:\windows\options\cabs, D:\win98, D:\win95.

9. Windows will ask you to restart the PC. Click the Yes button.

The TCP/IP Installation is now complete.

EtherFast®Cable/DSL Routers

Instant Broadband™Series

4-Port Router Specifications

Model Number BEFSR41 v2 Standards IEEE 802.3 (10BaseT), IEEE 802.3u (100BaseTX) Protocol CSMA/CD Ports

LAN: Four 10/100 RJ-45 switched ports WAN: One 10Base-T Ethernet RJ-45 port for the cable or

DSL modem

Speed

LAN: 10/100Mbps WAN: 10Mbps

Cabling Type

10BaseT: UTP Category 3 or better

100BaseTX: UTP Category 5 or better Topology Star LED Indicators Power,

LAN: Link/Act, Full/Coll, 100

WAN: Link, Act, Diag

4-Port Environmental Specifications

Dimensions 7.31" x 6.16" x 1.88" (186mm x 154mm x 48mm) Unit Weight 13.4 oz. (0.42 kg) Power Input Exter nal, 9V AC, 1 Amp Certif ications FCC Class B, CE Mark Commercial Operating Temperature 0°C to 40°C (32°F to 104°F) Storage Temperature -20°C to 70°C (-4°F to 158°F) Operating Humidity 10% to 85%, Non-condensing Storage Humidity 5% to 90%, Non-condensing

• Straight-Through Cabling

• Cross-Over Cabling

Crimping Your Own Network Cables

EtherFast®Cable/DSL Routers

Instant Broadband™Series

3-Port Router Specifications

Model Number BEFSRU31 Standards IEEE 802.3 (10BaseT), IEEE 802.3u

(100BaseTX) Protocol CSMA/CD Ports

LAN: Three 10/100 RJ-45 Switched ports WAN: One 10Base-T Ethernet RJ-45 port for the cable or

DSL modem Speed

LAN: 10/100Mbps WAN: 10Mbps

Cabling Type

10BaseT: UTP Category 3 or better

100BaseTX: UTP Category 5 or better Topology Star LED Indicators Power

LAN: Link/Act, Full/Coll, 100

WAN: Link, Act, Diag

USB: USB

3-Port Environmental Specifications

1-Port Router Specifications

Model Number BEFSR11 Standards IEEE 802.3 (10BaseT), IEEE 802.3u (100BaseTX) Protocol CSMA/CD Ports

LAN: One 10BaseT/100BaseTX RJ-45 port WAN: One10BaseT Broadband Uplink port

Speed

WAN: 10Mbps (10BaseT Ethernet) LAN: 10Mbps (10BaseT Ether net) or

100Mbps (100BaseTX Fast Ethernet)

Cabling Type

10BaseT: UTP Category 3 or better

100BaseTX: UTP Category 5 or better Topology Star LED Indicators Power,

LAN: Link/Act, Full/Coll, 100

WAN: Link, Act, Diag

1-Port Environmental Specifications

Dimensions 7.31" x 6.16" x 1.88" (186mm x 154mm x 48mm) Unit Weight 12.6 oz. (0.35 kg) Power Input Exter nal, 7.5V DC, 7 Amps Certif ications FCC Class B, CE Mark Commercial Operating Temperature 0°C to 40°C (32°F to 104°F) Storage Temperature -20°C to 70°C (-4°F to 158°F) Operating Humidity 10% to 85%, Non-condensing Storage Humidity 5% to 90%, Non-condensing

Instant Broadband™Series

www.linksys.com

Customer Support

For help with the installation or operation of your Instant Broadband EtherFast Cable/DSL Router, contact Linksys Customer Support at one of the phone numbers or Internet addresses below.

Sales Information 800-546-5797 (1-800-LINKSYS) Tech Support 866-242-8558 RMA Issues 949-261-1288 Fax 949-261-8868 Email support@linksys.com Web site http://www.linksys.com FTP site fttp://ftp.linksys.com

Linksys BEFSR41, BEFSRU31 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual