Linksys BEFSR41W Router Manual PDF (Setup & Configuration Guide)

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3. The following screen will appear, verifying that you are enabling WEP

Encryption.

Press the

button to continue. (See Figure 6-4.)

4. The following screen will appear, where you will choose your WEP

Encryption settings. For the Authentication Type, select

Open System

(default setting).(See Figure 6-5.)

5. For the Encryption, choose

64 Bit Encryption

128 Bit Encryption

. The

one you choose must also be used on all your other network devices. Enter

Hexadecimal characters, which are the letters “A” through “F” and the num-

bers “0” through “9” into the fields provided.

If you have set a WEP

Encryption on a wireless device on your network, then you must use the

same key set.

All devices on a network must use the same key set.

6. Click the

Save

button, then the Close button and the encryption portion of

the setup is now complete.

Note:

The

screen

shown in

this graphic

may differ

from

yours.

Figure 6-4

Figure 6-5

EtherFast

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

WEP (Wired Equivalent Privacy) Encryption is a method of encrypting data

that is transmitted over your wireless network to ensure data security. In a wired

network, data security is maintained through the physical wire.

WEP

Encryption provides the same level of security for your wireless data as if it

were being transmitted over standard network cabling (which is how the name

is derived).

In order to duplicate wired network security levels, wireless data

is encrypted at its point of transmission.

It is decoded by the receiving device.

This allows users to have the same amount of security over their wireless net-

work as they would over a wired network.

This level of security is above that

already provided by the use of password protection by your network operating

system.

The present standard for this encryption, set by the IEEE (the Institute of

Electrical and Electronics Engineers), is defined as 40-bit (sometimes also

called 64-bit) encryption.

Some vendors, including Linksys, offer the higher

128-bit encryption.

These numbers refer to the complexity of the algorithms

generated in order to code and decode the data transmitted.

The higher the bit

number, the greater the complexity of the algorithm, which is designed to pro-

vide increasingly secure encryption. Be aware, however, that higher levels of

encryption often negatively affect network data transmission rates.

This

encryption is not necessary for the operation of your wireless network

device, but is strongly recommended.

Your need for security can only be

determined by you.

If your security needs are such that ordinary password pro-

tection is sufficient, you may decide not to use the additional WEP Encryption.

However, should your security needs dictate it, the Cable/DSL Wireless-Ready

Router can provide as secure a connection as is available in wireless network-

ing.

1. At the Setup Screen, if you choose to enable WEP Encryption, select

Mandatory

under the WEP section.

2. Press the

WEP Key Setting

button to set the WEP Encryption type and

level.

Setting WEP Encryption

Note:

WEP Encryption is an additional data security measure that

is not essential for Router operation, but is strongly recommended.

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Page 17 / 38

This tab displays the current status of the Router; it reflects data and selections

that you have 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 of the firmware.

•

This field shows whether you have enabled the use of the Router’s

PPPoE support and the status.

•

LAN

These fields display the current IP Address and Subnet Mask of the

Router, as seen by users on your internal network.

•

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.

•

DNS (Domain Name System) IP Address

These fields show the IP

Address(es) of the DNS currently used by the Router. Multiple DNS IP set-

tings are common. In most cases, the first available DNS entry is used.

Status

Figure 6-7

EtherFast

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

It is strongly recommended that you set a password for the router. When you

first power up the router, you will notice that the Password setting default is

admin

.For security, we recommend that you change your password often.

To change your password, enter your new password in the Router Password

box.

Enter it again in the box just below the Router Password box, exactly as

you typed it in the first box.

When you are sure you have entered the password

as you want it, press the

Apply

button.

Password

If you set the Restore Factory Default option and click Apply,

you will clear all of the Router’s settings. Do not restore to

the factory defaults unless you want to completely set up the

Router again. Once the Router is reset, you will have to re-

enter your configuration.

Figure 6-6

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A DHCP (Dynamic Host Configuration Protocol) Server automatically assigns

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

it is highly recommended that your router be set up as a DHCP

server.

•

DHCP Server

Check the

Enable

option to enable the DHCP server option

of the router. If you already have a DHCP server on your network, set the

router’s DHCP option to

Disable

•

Starting IP Address

Enter a numerical value for the DHCP server to start

with when issuing IP addresses.

•

Number of DHCP Users

Enter the maximum number of PCs that you want

the DHCP server to assign IP addresses to, with the absolute maximum

being 253.

•

DHCP Clients Table

Click on the

Clients Table

button to show the cur-

rent DHCP Client information. (This information is stored in temporary

memory, so the list of clients could disappear.)

Help

DHCP

Figure 6-8

EtherFast

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

•

DHCP Release

Click the

DHCP Release

button to release the WAN IP

address from the Router.

•

DHCP Renew

Click the

DHCP Renew

button to get the new WAN IP

address from your ISP.

•

DHCP Clients Table

Click on the

Clients Table

button to show the current

DHCP Client information. (This information is stored in temporary memo-

ry, so the list of clients could disappear.)

DHCP

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Help

Under the Help tab, you’ll find links to all of the Router’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 the Router can access the Internet already, there’s no need to down-

load a newer firmware version, unless that version has a new feature that you

want to use.

Loading new firmware onto the Router might not enhance the

speed or the quality of your connection speed.

Figure 6-10

EtherFast

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

This tab shows the status of Logging on the Router.

If you enable logging, the

Router will keep a record of all sites on the Internet (i.e., e-mail, ftp sites, etc.)

that have been accessed through the Router.

•

Incoming/Outgoing Access Logs:

Here you will specify whether

you want to make a record of Internet sites that have been accessed

through

the Router.

Both outgoing or incoming addresses can be recorded.

(For

instance, if you have a web server, you can keep a record of the sites from

which your web server has been accessed.)

•

E-Mail Logs:

Select

Send Incoming Log

Send Outgoing Log.

Enter the

Email address

and

Subject

for the log.

Add the IP Address of the

SMTP

E-Mail Server

and the

Port Number

•

E-Mail Schedule:

Choose to send the log

When log is full

or enter a spe-

cific time. Select the

Timezone

in the drop-down menu.

• Click the

Apply

button to save any changes.

Log

Figure 6-9

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Filters block specific internal users

from accessing the Internet. You

can set up a filter through an IP

address or a network port number.

Filtered Private IP Range

•

To set up a filter using IP

addresses, enter the range of IP

addresses you wish to filter in

the IP address fields. Users who

have filtered IP addresses will

not be able to access the Internet

at all. If you only want to filter

one IP address instead of a

range of IP addresses, enter the

same value into both fields.

Filtered Private Port Range

•

To filter users by network port

number, enter a network port

number or a range of network ports. Select the protocol for each port number you

want to filter, TCP or UDP. Enter the port numbers you want to filter in the port

numbers fields. Users connected to the Router will no longer be able to access any

port number listed there.

Editing MAC Filter Setting

•

This feature filters the network adapter’s specific MAC address from going out to

the Internet.

•

To check your network adapter’s MAC address, run “winipcfg” or “ipconfig” in

the command prompt. To set the MAC filter, click the

Edit MAC Filter Setting

button. When a second window appears, select the range in the drop-down box,

and at the MAC number prompt, enter the 12-digit MAC address you want to fil-

ter. Click the

Apply

button and then the

Continue

button before closing the win-

dow.

Block WAN Request

•

By enabling the

Block WAN Request

feature, you can prevent your network from

being pinged or detected by other Internet users. The

Block WAN Request

feature

also adds another measure of security to your network by hiding your network

ports. Both functions of the

Block WAN Request

feature make it more difficult for

outside users to work their way into your network.

Filters

Figure 6-12

EtherFast

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

This screen shows the Universal Plug and Play services that are available.

Microsoft ME and XP feature Universal Plug and Play (UPnP), which allows

automatic discovery and configuration of equipment attached to the LAN.

UPnP allows enabled applications to automatically manage the router.

There are two ways to begin the UPnP configuration. Choose one:

• Double-click

My Network Place

. Then double-click the

Linksys

BEFSR41W icon

• Or, start your Web interface. Type in the address

http://192.168.1.1

Using either method, you will see the Setup tab. Click the

Advanced

tab. Then

click the

UPnP

tab.

On the UPnP tab, you have three features to choose from:

•

Enable UPnP Services

This allows Windows XP to activate the UPnP fea-

ture for automatic configuration.

•

Allow users to make configuration changes through UPnP

This allows

you to make manual changes while still using the UPnP feature.

•

Allow users to disable Internet access

This allows you to prohibit any and

all Internet connections.

Click

Apply

to accept changes, or click

Cancel

to cancel changes.

UPnP

Figure 6-11

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