Linksys BEFSR41W Router Manual PDF (Setup & Configuration Guide)

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

• Check if both ends of the network cable and power adapter are properly

connected. Check if the status LEDs on the front panel are functioning

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 Wireless-Ready Router.

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 set-

tings are correct (IP address, Subnet Mask, Default gateway and DNS)

• If the PCs are configured correctly, but still not working, check the

Cable/DSL Wireless-Ready 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 Wireless-Ready Router is configured correctly, check

your Internet connection (DSL/Cable modem, etc.) to see that it is work-

ing 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.

EtherFast

Cable/DSL Wireless-Ready Router with 4-Port Switch

Appendix A: Troubleshooting

Common Problems and Solutions

This section provides possible solutions to problems regarding the installation

and operation of the Cable/DSL Wireless-Ready 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 Wireless-Ready Router.

• Ensure that the Cable/DSL Wireless-Ready Router is properly installed,

LAN connections are OK, and it is powered ON.

• Ensure that your PC and the Cable/DSL Wireless-Ready Router are on

the same network segment. If you are not sure, initiate the DHCP func-

tion, 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

Wireless-Ready 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 Wireless-Ready Router. For the Cable/DSL Wireless-Ready

Router, you can check these settings by going to the Start Menu. Click

Settings

, then

Control Panel

, then double-click on

Network,

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 fin-

ishing 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 firmware by assigning a static IP

address to the computer, and then upgrade the firmware again. If that

doesn’t help, contact your dealer for further inspection.

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Does the Cable/DSL Wireless-Ready 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 fix:

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 file 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 simultaneously

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.”

EtherFast

Cable/DSL Wireless-Ready Router with 4-Port Switch

What is the maximum number of IP addresses that the Cable/DSL Wireless-Ready

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 Wireless-Ready Router installed on the network?

In a typ-

ical environment, the Router is installed between the Cable/DSL Modem and

the LAN.

Plug the Cable/DSL Wireless-Ready Router into the Cable/DSL

Modem’s Ethernet port.

Does the Cable/DSL Wireless-Ready Router support IPX or AppleTalk?

No. TCP/IP

is the only protocol standard for the Internet and has become the global stan-

dard for communications. IPX, a NetWare communications protocol used

only to route messages from one node to another, and AppleTalk, a commu-

nications 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 Wireless-Ready 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 Wireless-Ready

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.

Frequently Asked Questions

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If DMZ 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.

Will the Router allow me to use my own public IPs and Domain, or do I have to use

the IPs provided by the Router?

The router mode allows for customization of

your public IPs and Domain.

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 Filters, Forwarding, Dynamic Routing, Static Routing, and DMZ

host.

Does Linksys provide syslog support?

No, Linksys does not currently provide

syslog support.

How can I check whether I have static DHCP IP Addresses?

Consult your ISP to

confirm the information.

How do I get mIRC to work with the Router?

Set port forwarding to 113 for the

computer on which you are using mIRC.

If you are experiencing difficulty

after setting the port forwarding, try changing the Direct Client-to-Client

(DCC) settings to a range from 1024 to 1030 on the DCC option and

Forwarding page of the Web-based Setup Utility.

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

on the last page of this manual.

EtherFast

Cable/DSL Wireless-Ready Router with 4-Port Switch

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 firmware

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.

Does the Cable/DSL Wireless-Ready Router support IPSec?

Yes, but only pass

through IPSec is supported.

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.

Does the Router do Stateful packet inspection?

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?

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.

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At the DOS command prompt

, type

ping mail

. (assuming that the loca-

tion 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.

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.

Step Two: 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, how-

ever, 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 that

you just pinged.

At the DOS command prompt

, type “ping -a 24.53.32.4,” where

24.53.32.4 is the IP address that you just pinged. Information such as the

following data 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

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

EtherFast

Cable/DSL Wireless-Ready Router with 4-Port Switch

Appendix B: How to Obtain 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 address-

es, 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 servers 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 Router to your network.

Step One: Pinging an IP Address

The first step to determining your ISP’s web and e-mail server address is to

ping its IP address.

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.

Click Start

, then

Run,

and type

command

. This will bring up the DOS

window.

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Appendix C: 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, 98 or Millennium. For TCP/IP setup under

Microsoft Windows NT, 2000, or XP, please refer to your Microsoft Windows

NT, 2000, or XP manual.

1. Click the

Start

button. Choose

Settings

, then

Control Panel

2. Double-click the

Network

icon. Your Network window should pop up.

Select the

Configuration

tab.

3. Click the

Add

button

4. Double-click

Protocol

5. Highlight

Microsoft

under the list of manufacturers.

Figure C-1

EtherFast

Cable/DSL Wireless-Ready Router with 4-Port Switch

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.

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.

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

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

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