Linksys BEFSR41v3 Router Manual PDF (Setup & Configuration Guide)

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EtherFast Cable/DSL Routers

Instant Broadband Series

•

Subnet Mask:

255.255.255.0

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)

fields as provided

by your ISP.

5. When you have properly configured the Setup window, click the

Apply

but-

ton, then click the

Continue

button.

Select the DHCP tab

. For more information on this feature, refer to the

apropriate section under

The Cable/DSL Router’s Web-based Utility

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 network, select

Disable

for the

DHCP Server

option.

If you do so, you must use your existing DHCP serv-

er’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.

Reset the power on the cable or DSL modem

, and restart the PC so

the new Router settings will take effect.

The Cable/DSL Router’s Web-based

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),

shown below.

After entering the address value into the web browser, a password request page

will pop up as shown below. Leave the User Name field blank and type

“

admin

” into the Password field.

Then click the

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.

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

PPPoE

can be found under the

Setup

heading in the next

section.

Page 22 / 45

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 Server) 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 actively using the Internet, you can con-

figure your Router to cut your connection with your ISP after a certain peri-

od 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 (

) 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 on the box

next to

Keep Alive

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 identifica-

tion. You may have to check with your ISP to see if your Broadband Internet

service has been configured 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 firmware

you are using. Future versions of the Router’s firmware will be posted and

available for download on the Linksys Web site 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.

Note:

The Setup

page in this pic-

ture may differ

slightly from the

one you see.

Page 23 / 45

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 brows-

er'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 troubleshooting 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 selec-

tions 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 field shows the installed version and date of the

firmware.

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 fields 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

Page 24 / 45

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.

default as shown, add 100 to 50, and the range is 192.168.1.100 to

192.168.1.150.

• DHCP Clients Table

Click on the

DHCP

Clients Table

button to show the

current DHCP Client data. (This data is stored in temporary memory and

changes periodically).

The Log feature provides 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.

Outgoing Access Log lists all the URLS or IP addresses of Internet sites that

users on your network have accessed, and 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

Apply

button and then

the

Continue

button when you're done. You may download the Logviewer

software at

www.linksys.com

for more information.

Click on

Outgoing Access Log

Incoming Access Log

to view each log.

To disable Logging, select

Disable

in the Log window, then click the

Apply

button and the

Continue

button.

Logging

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 Address

fields 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 Table

This table lists the PCs that were given IP addresses

by the Router.

DHCP

A DHCP (Dynamic Host Configuration Protocol) server automatically assigns

IP addresses to each PC on your network for you. Unless you already have one,

it is highly recommended that you leave your Router enabled as a DHCP serv-

er.

• 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

and click the

Apply

button, 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-

Page 25 / 45

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 find the firmware upgrade file that you down-

loaded from the Linksys Web site.

Double-click the Upgrade file.

Click on the

Upgrade

button and follow

the instructions there.

Instant Broadband Series

NOTE: By upgrading the Router’s

firmware, you may lose the Router’s

configuration settings.

Under the Help tab, you’ll find links to all of the Utility’s internal support doc-

umentation, 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 new 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

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