Linksys BEFW11P1 Router Manual PDF (Setup & Configuration Guide)

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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.

If DMZ is used, does the exposed user share the public IP with the Wireless AP +

Cable/DSL Router?

No.

Does the Wireless AP + Cable/DSL Router pass PPTP packets or actively route

PPTP sessions?

The Wireless AP + Cable/DSL Router allows PPTP packets

to pass through.

Is the Wireless AP + Cable/DSL Router cross-platform compatible?

Any platform

that supports Ethernet and TCP/IP is compatible with the Wireless AP +

Cable/DSL Router.

Will the Wireless AP + Cable/DSL Router allow me to use my own public IPs and

Domain, or do I have to use the IPs provided by the Wireless AP + Cable/DSL

Router?

The router mode allows for customization of your public IPs and

Domain.

Does the Wireless AP + Cable/DSL Router replace a modem?

Is there a cable or

DSL modem in the Wireless AP + Cable/DSL Router?

No, this version of the

Wireless AP + Cable/DSL Router must work in conjunction with a cable or

DSL modem.

Which modems are compatible with the Wireless AP + Cable/DSL Router?

The

Wireless AP + Cable/DSL Router is compatible with virtually any cable or

DSL modem that supports Ethernet.

What are the advanced features of the Wireless AP + Cable/DSL Router?

The

Wireless AP + Cable/DSL Router’s advanced features include Filters,

Forwarding, Dynamic Routing, Static Routing, and DMZ host.

Does Linksys provided syslog support?

No, Linksys does not currently provide

syslog support.

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

Consult your ISP

to confirm the information.

How can I receive uncorrupted FTP downloads?

If you are experiencing cor-

rupted files when you download a file with your FTP client, try using anoth-

er FTP program.

Web page hangs, corrupt downloads, or nothing but junk characters are being dis-

played 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 tem-

porary measure.

(Please look at the Network Control Panel, in your Ethernet

Adapter's Advanced Properties tab.).

Check our website at www.linksys.com

for more information.

If all else fails in the installation, what can I do?

Reset the Wireless AP +

Cable/DSL 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

Linksys website, www.linksys.com.

How can I find upgrades to the Wireless AP + Cable/DSL Router’s firmware?

All

Linksys firmware upgrades are posted on the Linksys website at

www.linksys.com, where they can downloaded for free.

The Wireless AP +

Cable/DSL Router’s firmware can be upgraded with TFTP programs.

Will the Wireless AP + Cable/DSL Router function in a Macintosh environment?

Yes, but the Wireless AP + Cable/DSL Router’s web-based utility is accessi-

ble only through Internet Explorer or Netscape Navigator, versions 4.0 or

higher for Macintosh. (Linksys does not provide technical support for the

Macintosh platform.)

With which type of firewall is the Wireless AP + Cable/DSL Router equipped?

The

Wireless AP + Cable/DSL Router uses NAT and TCP/IP port inspections.

Does the Wireless AP + Cable/DSL Router do stateful packet inspection?

I am not able to get the web configuration screen for the Wireless AP + Cable/DSL

Router.

What can I do?

You may have to remove the proxy settings on your

Internet browser, e.g., Netscape Navigator or Internet Explorer.

You may also

need to remove any Firewall software you may be running or remove the dial-

up settings on your browser.

Check with your browser documentation.

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To achieve true seamless connectivity, the wireless LAN must incorporate a

number of different functions. Each node and Wireless AP + Cable/DSL

Router, for example, must always acknowledge receipt of each message. Each

node must maintain contact with the wireless network even when not actually

transmitting data. Achieving these functions simultaneously requires a dynam-

ic RF networking technology that links Wireless AP + Cable/DSL Routers and

nodes. In such a system, the user’s end node undertakes a search for the best

possible access to the system. First, it evaluates such factors as signal strength

and quality, as well as the message load currently being carried by each

Wireless AP + Cable/DSL Router and the distance of each Wireless AP +

Cable/DSL Router to the wired backbone. Based on that information, the node

next selects the right Wireless AP + Cable/DSL Router and registers its address.

Communications between end node and host computer can then be transmitted

up and down the backbone.

As the user moves on, the end nodes RF transmitter regularly checks the sys-

tem to determine whether it is in touch with the original Wireless AP +

Cable/DSL Router or whether it should seek a new one. When a node no longer

receives acknowledgment from its original Wireless AP + Cable/DSL Router,

it undertakes a new search. Upon finding a new Wireless AP + Cable/DSL

Router, it then re-registers, and the communication process continues.

What is BSS ID?

A specific Ad hoc LAN is called a Basic Service Set (BSS).

Computers in a BSS must be configured with the same BSS ID.

What is ESS ID?

An Infrastructure configuration could also support roaming

capability for mobile workers. More than one BSS can be configured as an

Extended Service Set (ESS). Users within an ESS could roam freely between

BSSs while served as a continuous connection to the network wireless stations

and Wireless AP + Cable/DSL Routers within an ESS must be configured with

the same ESS ID and the same radio channel.

What is ISM band?

The FCC and their counterparts outside of the U.S. have set

aside bandwidth for unlicensed use in the ISM (Industrial, Scientific and

Medical) band. Spectrum in the vicinity of 2.4 GHz, in particular, is being

made available worldwide. This presents a truly revolutionary opportunity to

place convenient high-speed wireless capabilities in the hands of users around

the globe.

What is Spread Spectrum?

Spread Spectrum technology is a wideband radio

frequency technique developed by the military for use in reliable, secure, mis-

sion-critical communications systems. It is designed to trade off bandwidth

How do I get mIRC to work with the Wireless AP + Cable/DSL Router?

Set port for-

warding to 113 for the computer on which you are using mIRC.

Can I run an application from a remote computer over the wireless network?

This

will depend on whether or not the application is designed to be used over a net-

work. Consult the application's user guide to determine if it supports operation

over a network.

Can I play computer games with other members of the cordless network?

Yes, as

long as the game supports multiple players over a LAN (local area network).

Refer to the game's user guide for more information.

What is the IEEE 802.11b standard?

The IEEE 802.11b Wireless LAN standards

subcommittee, which is formulating a standard for the industry. The objective

is to enable wireless LAN hardware from different manufacturers to communi-

cate.

What IEEE 802.11 features are supported?

The Wireless AP + Cable/DSL Router

supports the following IEEE 802.11 functions:

•

CSMA/CA plus Acknowledge protocol

•

Multi-Channel Roaming

•

Automatic Rate Selection

•

RTS/CTS feature

•

Fragmentation

•

Power Management

What is Ad-hoc?

An Ad-hoc wireless LAN is a group of computers, each with

a WLAN adapter, connected as an independent wireless LAN. Ad-hoc wireless

LAN is applicable at a departmental scale for a branch or SOHO operation.

What is Infrastructure?

An integrated wireless and wired LAN is called an

Infrastructure configuration. Infrastructure is applicable to enterprise scale for

wireless access to central database, or wireless application for mobile workers.

What is Roaming?

Roaming is the ability of a portable computer user to com-

municate continuously while moving freely throughout an area greater than that

covered by a single Wireless Network Access Point. Before using the roaming

function, the PC must make sure that it is the same channel number with the

Wireless AP + Cable/DSL Router of dedicated coverage area.

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Appendix

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.

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, the Router may have problems sending or receiving mail and

accessing the Internet. This happens because the Router has not been config-

ured 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.

Step One:

Pinging f

or an IP

ess

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.

efficiency for reliability, integrity, and security. In other words, more band-

width is consumed than in the case of narrowband transmission, but the trade

off produces a signal that is, in effect, louder and thus easier to detect, provid-

ed that the receiver knows the parameters of the spread-spectrum signal being

broadcast. If a receiver is not tuned to the right frequency, a spread-spectrum

signal looks like background noise. There are two main alternatives, Direct

Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum

(FHSS).

What is DSSS? What is FHSS? And what are their differences?

Frequency-hop-

ping spread-spectrum (FHSS) uses a narrowband carrier that changes frequen-

cy in a pattern that is known to both transmitter and receiver. Properly syn-

chronized, the net effect is to maintain a single logical channel. To an unin-

tended receiver, FHSS appears to be short-duration impulse noise. Direct-

sequence spread-spectrum (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 recov-

ered. Even if one or more bits in the chip are damaged during transmission, sta-

tistical 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.

Would the information be intercepted while transmitting on air?

WLAN features

two-fold protection in security. On the hardware side, as with Direct Sequence

Spread Spectrum technology, it has the inherent security feature of scrambling.

On the software side, WLAN series offer the encryption function (WEP) to

enhance security and Access Control. Users can set it up depending upon their

needs.

What is WEP?

WEP is Wired Equivalent Privacy; a data privacy mechanism

based on a 40 bit shared key algorithm, as described in the IEEE 802.11 stan-

dard.

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

NOTE: 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

the Cable/DSL Router to your network.

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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 fol-

lowing data will be displayed.

(Please note that the screen displayed below is only an example and may

appear differently on your system.)

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

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,

the Router should have no problem accessing the Internet through that Internet

application.

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, and Millennium. For TCP/IP setup under

Windows NT or 2000, please refer to your Windows manual.

Installing the TCP/IP Protocol

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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.

(Please note that the screen displayed below is only an example and may

appear differently on your system.)

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

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

Pinging f

or a

ess

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 less 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.

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7. After a few seconds you will be brought back to the main Network window.

The TCP/IP Protocol should now be listed.

8. Click the

button. Windows may ask for original Windows installation

files.

Supply

them

needed

(i.e.:

D:\win98,

D:\win95,

c:\windows\options\cabs.)

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

Yes

button to restart.

The TCP/IP Installation is complete.

In Windows 95, 98, and Millennium, you can use the

Winipcfg

program to

determine the MAC Address:

1. Open the "Run" dialog by clicking the

Start

button and selecting

Run

2. Type in “winipcfg” and click the

button.

3. In Winipcfg, select your network adapter from the drop-down list. The hard-

ware address will be shown on screen.

In Windows NT or 2000, you can use the

cmd

program to determine the MAC

Address:

1. Open the "Run" dialog by clicking the

Start

button and selecting

Run

2. Type in “cmd” and click the

button.

3. In the cmd window, type “ipconfig /all”. Your MAC Address will be dis-

played as the “Physical Address”.

How to Determine Your PC’s MAC Address

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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 manufactures.

6. Find and double-click

TCP/IP

in the list to the right (below)

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