Linksys Router BEFDSR41W User Manual

Instant Broadband™  Series
ADSL GatewayModem / Router / 4-Port Switch / Wireless-ReadyUse this guide to install the following product:BEFDSR41W 
User Guide 

COPYRIGHT & TRADEMARKS 
Copyright © 2002 Linksys, All Rights Reserved.  Instant Broadband is a 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 ADSL Gateway with Modem / Router  /
4-Port Switch / Wireless-Ready will be free from physical defects in material and work-
manship for one...

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment to an outlet on a circuit different from that to which the receiv-
er is connected.
• Consult a dealer or an experienced radio/TV technician for assistance.
This device complies with Part 15 of the FCC Rules.  Operation is subject to the follow-
ing two conditions:
• This device may not cause harmful interference.
• This device must accept any interference received,...

ADSL Gateway with Modem / Router / 4-Port Switch / Wireless-ReadyFiltering 47
Forwarding 49
Dynamic Routing 51
Static Routing  53
DMZ Host 55
Firewall 56
Link Test 57
Appendix A: Troubleshooting  58
Common Problems and Solutions 58
Frequently Asked  Questions 60
Appendix B: Configuring Wireless Security  64
Conf iguring Wireless Security in Windows XP 68
Appendix C: Installing the TCP/IP Protocol 73
Appendix D: Finding the MAC Address and IP
Address for Your Ethernet Adapter 75
Appendix E: Specifications...

Instant Broadband
™Series
ADSL Gateway with Modem / Router / 4-Port Switch / Wireless-ReadyChapter 1: IntroductionThank you for choosing the Instant Broadband™  ADSL Gateway with Modem / Router / 4-
Port Switch / Wireless-Ready.  This Gateway allows you to set up a network with your PCs
and share your Internet connection.
The Gateway does this by connecting to your ADSL line, and using the Gateway’s Ethernet
ports to connect your PCs; it’s like each PC is connected directly to the Internet. This way,...

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Think of the Gateway as a network device with two sides:  the f irst side is made
up of your private Local Area Network (LAN)of PCs.  The other, public side is
the Internet, or the Wide Area Network (WAN), outside of your home or off ice.
The Gateway’s f irewall (NAT) protects your network of PCs so users on the
public, Internet side cannot “see” your PCs.  This is how your LAN, or network,
remains private. The Gateway protects your...

ADSL Gateway with Modem / Router / 4-Port Switch / Wireless-ReadyThis user guide covers the basic steps for setting up a network with a Gateway.
After going through the “Getting to Know the Gateway” chapter, most users
will only need to use the following chapters: 
•Chapter 3: Connecting the Gateway
This chapter instructs you on how to connect the ADSL line to the Gateway
and connect the PC(s) to the Gateway.
•Chapter 4: Conf iguring the PCs
This chapter instructs you on how to conf igure your PC(s) for...

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PowerGreen. The PowerLED lights up when the Gateway is pow-
ered on.
DiagGreen. The DiagLED flashes when the Gateway is booting
up.  If this flashes or stays solid after the bootup phase, the
Gateway may be malfunctioning. See “Appendix A:
Troubleshooting” if you encounter this problem.
Link/ActGreen. The Link/ActLED serves two purposes. If the LED
is continuously lit, the Gateway is successfully connected to...

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Chapter 3:Connecting the
Gateway You will connect the Gateway to your ADSL line and to the computers in your
home or business.
First, make sure that all the devices that you’ll be working with are powered
down, including your PCs and the Gateway.
1. Connect one end of the provided phone cable to the ADSL (RJ-11 phone)
port that is on the back of the Gateway.
2. Connect the other end of the phone cable to the...

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4. Connect the power adapter to the Gateway. Plug the power adapter into the
electrical outlet. 
5. Turn on the Gateway. Then, turn on the f irst PC that you want to use to con-
f igure the Gateway.
Go to “Chapter 4: Configuring the PCs.” 3. Connect one end of an Ethernet cable to your PC’s Ethernet adapter.  Connect
the other end of the cable to one of the LAN ports on the back of the Gateway.
Repeat this...