LINKSYS BEFSR41 User Manual

Name: LINKSYS BEFSR41
Brand: LINKSYS
SKU: 8338292
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A Division of Cisco Systems, Inc.

EtherFast®

Cable/DSL Router

with 4-Port Switch User Guide

WIRED

Model No. BEFSR41

Figure 0-1: Sample Figure Description

EtherFast Cable/DSL Router with 4-Port Switch

Specifications are subject to change without notice. Linksys and EtherFast are registered trademarks or trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and certain other countries. Copyright © 2004 Cisco Systems, Inc. All rights reserved. Other brands and product names are trademarks or registered trademarks of their respective holders.

WARNING: This product contains chemicals, including lead, known to the State of California to cause cancer, and birth defects or other reproductive harm. Wash hands after handling.

How to Use this Guide

Your guide to the EtherFast Cable/DSL Router with 4-Port Switch has been designed to make understanding networking with the Router easier than ever. Look for the following items when reading this User Guide:

This checkmark means there is a note of interest and is something you should pay special attention to while using the Router.

This exclamation point means there is a caution or warning and is something that could damage your property or the Router.

This question mark provides you with a reminder about something you might need to do while using the Router.

In addition to these symbols, there are definitions for technical terms that are presented like this:

word: definition.

Also, each figure (diagram, screenshot, or other image) is provided with a figure number and description, like this:

Figure numbers and descriptions can also be found in the “List of Figures” section.

BEFSR41_V3-UG-40806A JL

EtherFast Cable/DSL Router with 4-Port Switch

Table of Contents

Chapter 1: Introduction	1
Welcome	1
What’s in this Guide?	2
Chapter 2: Networking Basics	4
An Introduction to Local Area Networks	4
The Use of IP Addresses	4
Chapter 3: Getting to Know the Router	6
The Back Panel	6
The Front Panel	7
Chapter 4: Connecting the Router	8
Overview	8
Connection Instructions	9
Chapter 5: Configuring the Router	10
Overview	10
How to Access the Web-based Utility	11
The Setup Tab - Basic Setup	12
The Setup Tab - DDNS	18
The Setup Tab - MAC Address Clone	19
The Security Tab - Filter	22
The Security Tab - VPN	24
The Applications & Gaming Tab - Port Range Forwarding	25
The Applications & Gaming Tab - Port Triggering	26
The Applications & Gaming Tab - UPnP Forwarding	27
The Applications & Gaming Tab - DMZ	29
The Administration Tab - Management	30
The Administration Tab - Log	32
The Administration Tab - Factory Defaults	33
The Administration Tab - Firmware Upgrade	34
The Status Tab - Router	35
The Status Tab - Local Network	36
Appendix A: Troubleshooting	37

Common Problems and Solutions

EtherFast Cable/DSL Router with 4-Port Switch
Frequently Asked Questions	47
Appendix B: Upgrading Firmware	51
Appendix C: Finding the MAC Address and IP Address for Your
Ethernet Adapter	52
Windows 98 or Me Instructions	52
Windows 2000 or XP Instructions	52
For the Router’s Web-based Utility	53
Appendix D: Windows Help	54
Appendix E: Glossary	55
Appendix F: Specifications	60
Appendix G: Warranty Information	62
Appendix H: Regulatory Information	63
Appendix I: Contact Information	64

EtherFast Cable/DSL Router with 4-Port Switch

List of Figures

Figure 3-1: Back Panel	6
Figure 3-2: Front Panel	7
Figure 4-1: Example of a Typical Network	9
Figure 4-2: Connect a PC	9
Figure 4-3: Connect the Cable/DSL Modem	9
Figure 4-4: Connect the Power	9
Figure 5-1: Router’s IP Address	11
Figure 5-2: Router Login	11
Figure 5-3: Setup Tab - Basic Setup (Obtain an IP automatically)	12
Figure 5-4: Static IP	13
Figure 5-5: PPPoE	13
Figure 5-6: RAS	14
Figure 5-7: PPTP	14
Figure 5-8: Heart Beat Signal	15
Figure 5-9: L2TP	16
Figure 5-10: Setup Tab - DDNS (DynDNS.org)	18
Figure 5-11: Setup Tab - DDNS (TZO.com)	18
Figure 5-12: Setup Tab - MAC Address Clone	19
Figure 5-13: Setup Tab - Advanced Routing	20
Figure 5-14: Routing Table Entry List	21
Figure 5-15: Security Tab - Firewall	22
Figure 5-16: MAC Filter Setting	22
Figure 5-17: Security Tab - VPN Passthrough	24
Figure 5-18: Applications & Gaming Tab - Port Range Forwarding	25
Figure 5-19: Applications & Gaming Tab - Port Triggering	26
Figure 5-20: Applications & Gaming Tab - UPnP Forwarding	27
Figure 5-21: Applications & Gaming Tab - DMZ	29
Figure 5-22: Administration Tab - Management	30

EtherFast Cable/DSL Router with 4-Port Switch
Figure 5-23: Administration Tab - Log	32
Figure 5-24: Incoming Log Table	32
Figure 5-25: Outgoing Log Table	32
Figure 5-26: System Log	32
Figure 5-27: Administration Tab - Factory Defaults	33
Figure 5-28: Administration Tab - Firmware Upgrade	34
Figure 5-29: Status Tab - Router	35
Figure 5-30: Status Tab - Local Network	36
Figure 5-31: DHCP Client Table	36
Figure B-1: Upgrade Firmware	51
Figure C-1: IP Configuration Screen	52
Figure C-2: MAC Address/Adapter Address	52
Figure C-3: MAC Address/Physical Address	53
Figure C-4: MAC Filtering	53
Figure C-5: MAC Address Clone	53

EtherFast Cable/DSL Router with 4-Port Switch

Chapter 1: Introduction

Welcome

Thank you for choosing the EtherFast Cable/DSL Router with 4-Port Switch. This Router will allow your computers to share a high-speed Internet connection as well as resources, including files and printers.

How does the Router do all of this? By connecting your computers and peripherals to the Router and connecting the Router to your cable or DSL modem, then the Router can direct and control communications for your network.

But what does all of this mean?

Networks are useful tools for sharing Internet access and computer resources. Multiple computers can share Internet access, so you don’t need more than one high-speed Internet connection. You can access one printer from different computers and access data located on another computer’s hard drive. Networks are even used for playing multiplayer video games. So, networks not only are useful in homes and offices, but also can be fun.

PCs on a wired network create a LAN, or Local Area Network. They are connected with Ethernet cables, which is why the network is called “wired”.

To create your network, install and set up the Router. To guide you through the process, Linksys strongly recommends that you run the Setup Wizard on the Setup CD-ROM. If you prefer to manually set up the Router, use the instructions in the Quick Installation or this User Guide to help you. These instructions should be all you need to get the most out of the Router.

Chapter 1: Introduction

lan (local area network): the computers and networking products that make up the network in your home or office

ethernet: an IEEE standard network protocol that specifies how data is placed on and retrieved from a common transmission medium

Welcome

EtherFast Cable/DSL Router with 4-Port Switch

What’s in this Guide?

This user guide covers the basic steps for setting up a network with a router. After going through “Chapter 3:

Getting to Know the Router,” most users will only need to use the following chapters:

•Chapter 4: Connecting the Router

This chapter instructs you on how to connect the Router to your cable or DSL modem, PCs, and peripherals, such as a printer.

•Chapter 5: Configuring the Router

This chapter explains how to configure the Router using your web browser and the Router’s Web-based Utility. You will configure the Router using the settings provided by your ISP.

When you’re finished with the basic steps, then you are ready to connect to the Internet.

You also have other chapter available for reference:

•Chapter 1: Introduction

This chapter describes the Router’s applications and this User Guide.

•Chapter 2: Networking Basics

This chapter briefly explains how a network functions.

•Appendix A: Troubleshooting

This appendix describes some possible problems and solutions, as well as frequently asked questions, regarding installation and use of the Router.

•Appendix B: Upgrading Firmware

This appendix explains how you can upgrade the Router’s firmware.

•Appendix C: Finding the MAC Address and IP Address for Your Ethernet Adapter

This appendix instructs you on how to find the MAC address or Ethernet address of your PC’s Ethernet network adapter.

•Appendix D: Windows Help

This appendix describes how you can use Windows Help for instructions about networking, such as installing the TCP/IP protocol.

•Appendix E: Glossary

This appendix gives a brief glossary of terms frequently used in networking.

Chapter 1: Introduction

What’s in this Guide?

EtherFast Cable/DSL Router with 4-Port Switch

•Appendix F: Specifications

This appendix provides the technical specifications for the Router.

•Appendix G: Warranty Information

This appendix supplies the warranty information for the Router.

•Appendix H: Regulatory Information

This appendix supplies the regulatory information regarding the Router.

•Appendix I: Contact Information

This appendix provides contact information for a variety of Linksys resources, including Technical Support.

Chapter 1: Introduction

What’s in this Guide?

EtherFast Cable/DSL Router with 4-Port Switch

Chapter 2: Networking Basics

An Introduction to Local Area Networks

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

The Router connects your local area network (LAN), or the group of PCs in your home or office, to the Internet. The Router processes and regulates the data that travels between these two networks.

The Router’s Network Address Translation (NAT) technology protects your network of PCs so users on the Internet cannot “see” your PCs. This is how your LAN remains private. The Router protects your network by inspecting the first packet coming in through the Internet port before delivery to the final destination on one of the Ethernet ports. The Router inspects Internet port services like the web server, ftp server, or other Internet applications, and, if allowed, it will forward the packet to the appropriate PC on the LAN side.

The Use of IP Addresses

IP stands for Internet Protocol. Every device in an IP-based network, including PCs, print servers, and routers, requires an IP address to identify its location, or address, on the network. This applies to both the Internet and LAN connections.

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

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 ensures that the device assigned it will always have that same IP address until you change it. Static IP addresses are commonly used with network devices such as server PCs or print servers.

If you use the 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 the Router. You can get the information from your ISP.

A dynamic IP address is automatically assigned to a device on the network. These IP addresses are called dynamic because they are only temporarily assigned to the PC or other device. After a certain time period, they expire and may change. If a PC logs onto the network (or the Internet) and its dynamic IP address has expired, the DHCP server will assign it a new dynamic IP address.

Chapter 2: Networking Basics

nat (network address translation): NAT technology translates IP addresses of a local area network to a different IP address for the Internet.

static ip address: a fixed address assigned to a computer or device that is connected to a network

dynamic ip address: a temporary IP address assigned by a DHCP server

dhcp (dynamic host configuration protocol): a protocol that lets one device on a local network, known as a DHCP server, assign temporary IP addresses to the other network devices, typically computers

An Introduction to Local Area Networks

EtherFast Cable/DSL Router with 4-Port Switch

A DHCP server can either be a designated PC on the network or another network device, such as the Router. By default, the Router’s Internet Connection Type is Obtain an IP automatically (DHCP).

The PC or network device obtaining an IP address is called the DHCP client. DHCP frees you from having to assign

IP addresses manually every time a new user is added to your network.

For DSL users, many ISPs may require you to log on with a user name and password to gain access to the Internet. This is a dedicated, high-speed connection type called Point to Point Protocol over Ethernet (PPPoE). PPPoE is similar to a dial-up connection, but PPPoE does not dial a phone number when establishing a connection. It also will provide the Router with a dynamic IP address to establish a connection to the Internet.

By default, a DHCP server (on the LAN side) is enabled on the 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 the Router, see the Basic Setup section in “Chapter 5: Configuring the Router.”

Chapter 2: Networking Basics

The Use of IP Addresses

EtherFast Cable/DSL Router with 4-Port Switch

Chapter 3: Getting to Know the Router

The Back Panel

The Router’s ports and the Reset button are located on the back panel of the Router.

	Figure 3-1: Back Panel
Reset Button	There are two ways to reset the Router to its factory default settings. Either press the Reset
	button for approximately five seconds, or restore the defaults from the Administration tab -
	Factory Defaults of the Router's Web-based Utility.
Internet	This Internet port connects to your cable or DSL modem.
1-4	These four Ethernet ports connect to network devices, such as PCs, print servers, or additional
	switches.
Power	The Power port is where you will connect the power adapter.

IMPORTANT: If you reset the Router, all of your settings, including Internet connection and security settings, will be deleted and replaced with the factory defaults. Do not reset the Router if you want to retain these settings.

Chapter 3: Getting to Know the Router

The Back Panel

EtherFast Cable/DSL Router with 4-Port Switch

The Front Panel

The Router’s LEDs, which inform you about network activities, are located on the front panel.

	Figure 3-2: Front Panel
Power	Green. The Power LED lights up when the Router is powered on. If the LED is flashing, the
	Router is booting up, running a system self-test, or upgrading its firmware.
Ethernet 1-4	Green. The Ethernet LED serves two purposes. If the LED is solidly lit, the Router is connected
	to a device through the corresponding port (Ethernet 1, 2, 3, or 4). If the LED is flashing, the
	Router is sending or receiving data over that port.
Internet	Green. The Internet LED lights up when the Router is connected to your cable or DSL modem.
	If the LED is flashing, the Router is sending or receiving data over the Internet port.
	Proceed to “Chapter 4: Connecting the Router.”

Chapter 3: Getting to Know the Router

The Front Panel

EtherFast Cable/DSL Router with 4-Port Switch

Chapter 4: Connecting the Router

Overview

Using the Setup Wizard

Linksys strongly recommends using the Setup CD-ROM for first-time installation of the Router. To use the Setup CD-ROM, insert the CD-ROM into your computer’s CD-ROM drive. The Setup Wizard should run automatically, and the Welcome screen should appear. If it does not, click the Start button and choose Run. In the field that appears, enter D:\setup.exe (if “D” is the letter of your CD-ROM drive). Then follow the on-screen instructions.

Using the Quick Installation or User Guide

If you do not wish to run the Setup Wizard, then follow the instructions in the Quick Installation or

Chapters 4 and 5 of the User Guide to connect and configure the Router.

To set up your network, do the following:

•Connect the Router to your PCs.

•If necessary, configure your PCs to obtain an IP address automatically from the Router. For instructions, refer to Windows Help. (By default, Windows 98, 2000, Millennium, and XP computers are set to obtain an IP address automatically, so unless you have changed the default setting, then you do not need to configure your PCs.)

•Using the Router’s Web-based Utility, configure the Router with the setting(s) provided by your Internet Service Provider (ISP).

The installation technician from your ISP should have left the setup information with you after installing your broadband connection. If not, you can contact your ISP to request the information. Once you have the setup information for your specific type of Internet connection, then you can begin installation and setup of the Router.

Chapter 4: Connecting the Router

Overview

EtherFast Cable/DSL Router with 4-Port Switch

Notebook with

Ethernet Adapter

Cable or DSL

Modem

Router

PC with Ethernet Adapter

Figure 4-1: Example of a Typical Network

Connection Instructions

1.Make sure that all network devices are powered off, including the Router, PCs, switches, cable or DSL modem, and peripherals.

2.Connect one end of an Ethernet network cable to one of the numbered ports on the back of the Router. Connect the other end to an Ethernet port on a network device, e.g., a PC, print server, or switch.

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

3.Connect your cable or DSL modem’s Ethernet cable to the Router’s Internet port.

4.Power on the cable or DSL modem.

5.Connect the included power adapter to the Router’s Power port and then plug the power adapter into an electrical outlet. The Power LED on the Router’s front panel will light up as soon as the power adapter is connected properly.

6.Power on your PC(s).

Proceed to “Chapter 5: Configuring the Router.”

Chapter 4: Connecting the Router

Figure 4-2: Connect a PC

Figure 4-3: Connect the Cable/DSL Modem

Figure 4-4: Connect the Power

Connection Instructions

EtherFast Cable/DSL Router with 4-Port Switch

Chapter 5: Configuring the Router

Overview

Now that you have connected the Router following the instructions in Chapter 4, you can use the Web-based Utility to configure the Router. Advanced users may configure the Router’s advanced settings through the Webbased Utility.

This chapter will describe each web page on the Utility and each page’s key functions. The Utility can be accessed via your web browser through use of a computer connected to the Router. For a basic network setup, most users only have to use the following screens of the Utility:

•Basic Setup. On the Basic Setup screen, enter the Internet connection settings provided by your ISP. If you do not have this information, you can call your ISP to request the settings. Once you have the setup information for your specific type of Internet connection, then you can configure the Router.

•Management. Click the Administration tab and then the Management tab. The Router’s default password is admin. To secure the Router, change the Password from its default.

There are five main tabs: Setup, Security, Applications & Gaming, Administration, and Status. Additional tabs will be available after you click one of the main tabs.

Setup

•Basic Setup. Enter the Internet connection and network settings on this screen.

•DDNS. Enable the Router’s Dynamic Domain Name System (DDNS) feature on this screen.

•MAC Address Clone. If you need to clone a MAC address onto the Router, use this screen.

•Advanced Routing. On this screen, you can alter Network Address Translation (NAT), dynamic routing, and static routing configurations.

Security

•Filter. On this screen, you can configure a variety of filters to enhance the security of your network.

•VPN. To enable or disable IPSec, PPPoE, and/or PPTP Passthrough for Virtual Private Network (VPN) tunnels.

Chapter 5: Configuring the Router

Overview

EtherFast Cable/DSL Router with 4-Port Switch

Applications & Gaming

•Port Range Forwarding. Set up public services or other specialized Internet applications on your network.

•Port Triggering. To set up triggered ranges and forwarded ranges for Internet applications, click this tab.

•UPnP Forwarding. Use this screen to alter Universal Plug and Play (UPnP) forwarding settings.

•DMZ. Click this tab to allow one local user to be exposed to the Internet for use of special-purpose services.

Administration

•Management. On this screen, alter the Router’s password and access privileges, as well as the UPnP settings.

•Log. If you want to view or save activity logs, click this tab.

•Factory Defaults. If you want to restore the Router’s factory defaults, then use this screen.

•Firmware Upgrade. Click this tab if you want to upgrade the Router’s firmware.

Status

•Router. This screen provides status information about the Router.

•Local Network. This provides status information about the local network.

How to Access the Web-based Utility

To access the Web-based Utility of the Router, launch Internet Explorer or Netscape Navigator, and enter the Router’s default IP address, 192.168.1.1, in the Address field. Press the Enter key.

A screen will appear asking you for your User name and Password. Enter admin in the User Name and Password fields. Then click the OK button.

Make the necessary changes through the Utility. When you have finished making changes to a screen, click the Save Settings button to save the changes, or click the Cancel Changes button to undo your changes. Help information is shown on the right-hand side of a screen. For additional help on a tab, click More.

Chapter 5: Configuring the Router

Figure 5-1: Router’s IP Address

Figure 5-2: Router Login

How to Access the Web-based Utility

EtherFast Cable/DSL Router with 4-Port Switch

The Setup Tab - Basic Setup

The Basic Setup screen is the first screen you see when you access the Web-based Utility.

Internet Setup

The Internet Setup section configures the Router for your Internet connection type. This information can be obtained from your ISP.

Internet Connection Type

The Router supports seven connection types: Obtain an IP automatically, Static IP, PPPoE, RAS, PPTP, HBS, and L2TP. Each Basic Setup screen and available features will differ depending on what kind of connection type you select.

Obtain an IP Automatically

By default, the Router’s Internet Connection Type is set to Obtain an IP automatically, and it should be used only if your ISP supports DHCP or you are connecting through a dynamic IP address.

Figure 5-3: Setup Tab - Basic Setup

(Obtain an IP automatically)

Chapter 5: Configuring the Router

The Setup Tab - Basic Setup

EtherFast Cable/DSL Router with 4-Port Switch

Static IP

If you are required to use a permanent IP address, then select Static IP.

IP Address. This is the IP address that the Router has, when seen from the Internet. Your ISP will provide you with the IP Address you need to specify here.

Subnet Mask. This is the Router’s Subnet Mask, as seen by external users on the Internet (including your ISP). Your ISP will provide you with the Subnet Mask.

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

Static DNS 1-3. Your ISP will provide you with at least one DNS (Domain Name System) Server IP Address.

PPPoE

Some DSL-based ISPs use PPPoE (Point-to-Point Protocol over Ethernet) for Internet connections. If you use a DSL line, check with your ISP to see if they use PPPoE. If they do, you will have to enable it.

User Name and Password. Enter the User Name and Password provided by your ISP.

Service Name. Enter the Service Name provided by your ISP.

Connect on Demand and Max Idle Time. You can configure the Router to cut the Internet connection after it has been inactive for a specific period of time (Max Idle Time). If your Internet connection has been terminated due to inactivity, Connect on Demand enables the 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, click the radio button. If you want your Internet connection to remain on at all times, enter 0 in the Max Idle Time field. Otherwise, enter the number of minutes you want to have elapsed before your Internet access disconnects.

Keep Alive and Redial Period. This option keeps your Internet access connected indefinitely, even when it sits idle. If you select this option, the Router will periodically check your Internet connection. If the connection is down, then the Router will automatically re-establish the connection. To use this option, click the radio button next to Keep Alive. The default Redial Period is 30 seconds.

When you are finished, click the Save Settings button. Then click the Status tab, and click the Connect button to start the connection.

Note: For DSL users, if you need to enable PPPoE support, remember to remove any PPPoE applications that are installed on your PCs.

Chapter 5: Configuring the Router

Figure 5-4: Static IP

static ip address: a fixed address assigned to a computer or device connected to a network

subnet mask: an address code that determines the size of the network

default gateway: a device that forwards Internet traffic from your local area network

Figure 5-5: PPPoE

pppoe (point-to-point over ethernet): a type of broadband connection that provides authentication (username and password) in addition to data transport

The Setup Tab - Basic Setup

EtherFast Cable/DSL Router with 4-Port Switch

RAS

Remote Access Service (RAS) is a service that applies to connections in Singapore only. For users in Singapore, check with Singtel for information on RAS.

User Name and Password. Enter the User Name and Password supplied by Singtel.

RAS Plan. Select the type of plan you have.

When you are finished, click the Save Settings button. Then click the Status tab, and click the Connect button to start the connection.

PPTP

Point-to-Point Tunneling Protocol (PPTP) is a service that applies to connections in Europe and Israel only.

IP Address. This is the IP address that the Router has, when seen from the Internet. Your ISP will provide you with the IP Address you need to specify here.

Subnet Mask. This is the Router’s Subnet Mask, as seen by external users on the Internet (including your ISP). Your ISP will provide you with the Subnet Mask.

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

User Name and Password. Enter the User Name and Password provided by your ISP.

Chapter 5: Configuring the Router

Figure 5-6: RAS

Figure 5-7: PPTP

The Setup Tab - Basic Setup

EtherFast Cable/DSL Router with 4-Port Switch

connection as soon as you attempt to access the Internet again. If you wish to activate Connect on Demand, click the radio button. If you want your Internet connection to remain on at all times, enter 0 in the Max Idle Time field. Otherwise, enter the number of minutes you want to have elapsed before your Internet access disconnects.

When you are finished, click the Save Settings button. Then click the Status tab, and click the Connect button to start the connection.

Heart Beat Signal

Heart Beat Signal is a service used in Australia only. If you are using a Heart Beat Signal connection, check with your ISP for the necessary setup information.

User Name and Password. Enter the User Name and Password provided by your ISP.

Heart Beat Server. Enter the IP address of your ISP’s Heart Beat server. This is provided by your ISP.

When you are finished, click the Save Settings button. Then click the Status tab, and click the Connect button to start the connection.

Chapter 5: Configuring the Router

Figure 5-8: Heart Beat Signal

The Setup Tab - Basic Setup

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