25

Chapter 5: Configuring the Wireless-G Cable Gateway

The Wireless Tab

Wireless-G Cable Gateway

WPA-Personal. To use WPA-Personal, select

WPA-Personal

from the

Security Mode

drop-down menu. Select a

method of encryption. Then enter a Passphrase and a Key Renewal period.

•

Encryption. WPA offers you two encryption methods, TKIP and AES, with dynamic encryption keys. Select the

type of algorithm you want to use,

TKIP

or

AES

.

•

Passphrase. Enter a Passphrase (also called a WPA Shared Key) of 8-32 characters.

•

Key Renewal. Enter a Key Renewal timeout period, which instructs the Gateway how often it should change

the encryption keys.

When finished making your changes on this tab, click the

Save Settings

button to save these changes, or click

the

Cancel Changes

button to undo your changes.

WPA2-Personal. To use WPA2-Personal, select

WPA2-Personal

from the

Security Mode

drop-down menu. Select

a method of encryption. Then enter a Passphrase and a Key Renewal period.

•

Encryption. Select the encryption method you want to use,

AES

or

TKIP + AES

.

•

Passphrase. Enter a Passphrase (also called a WPA Shared Key) of 8-32 characters.

•

Key Renewal. Enter a Key Renewal timeout period, which instructs the Gateway how often it should change

the encryption keys.

When finished making your changes on this tab, click the

Save Settings

button to save these changes, or click

the

Cancel Changes

button to undo your changes.

Figure 5-8: WPA-Personal

Figure 5-9: WPA2-Personal

wpa

(wi-fi protected access: a wireless security

protocol using TKIP (Temporal Key Integrity Protocol)

encryption, which can be used in conjunction with a

RADIUS server.

26

Chapter 5: Configuring the Wireless-G Cable Gateway

The Wireless Tab

Wireless-G Cable Gateway

WPA-Enterprise. This option features WPA used in coordination with a RADIUS server. (This should only be used

when a RADIUS server is connected to the Gateway.) To use WPA-Enterprise, select

WPA-Enterprise

from the

Security Mode

drop-down menu. Select a method of encryption and your RADIUS settings. Then enter a Shared

Secret key and a Key Renewal period.

•

Encryption. WPA offers you two encryption methods, TKIP and AES, with dynamic encryption keys. Select the

type of algorithm you want to use,

TKIP

or

AES

.

•

RADIUS Server Address. Enter the RADIUS server’s IP address.

•

RADIUS Port. Enter the port number used by the RADIUS server.

•

Shared Secret. Enter the Shared Secret key used by the Gateway and RADIUS server.

•

Key Renewal. Enter a Key Renewal timeout period, which instructs the Gateway how often it should change

the encryption keys.

When finished making your changes on this tab, click the

Save Settings

button to save these changes, or click

the

Cancel Changes

button to undo your changes.

WPA2-Enterprise. This option features WPA2 used in coordination with a RADIUS server. (This should only be used

when a RADIUS server is connected to the Gateway.) To use WPA2-Enterprise, select

WPA2-Enterprise

from the

Security Mode

drop-down menu. Select a method of encryption and your RADIUS settings. Then enter a Shared

Secret key and a Key Renewal period.

•

Encryption. Select the encryption method you want to use,

AES

or

TKIP + AES

.

•

RADIUS Server Address. Enter the RADIUS server’s IP address.

•

RADIUS Port. Enter the port number used by the RADIUS server.

•

Shared Secret. Enter the Shared Secret key used by the Gateway and RADIUS server.

•

Key Renewal. Enter a Key Renewal timeout period, which instructs the Gateway how often it should change

the encryption keys.

When finished making your changes on this tab, click the

Save Settings

button to save these changes, or click

the

Cancel Changes

button to undo your changes.

radius

(remote authentication dial-in user service): a

protocol that uses an authentication server to control

network access.

server:

any computer whose function in a network is to

provide user access to files, printing, communications, and

other services.

27

Chapter 5: Configuring the Wireless-G Cable Gateway

The Wireless Tab

Wireless-G Cable Gateway

RADIUS. This option features WEP used in coordination with a RADIUS server. (This should only be used when a

RADIUS server is connected to the Gateway.) First, enter your RADIUS settings. Select a level of WEP encryption,

64-Bit Encryption

or

128-Bit Encryption

. Then select a Default Key (choose which Key to use). Then either

generate a WEP key using a Passphrase or enter the WEP key manually.

•

RADIUS Server Address. Enter the RADIUS server’s IP address.

•

RADIUS Port. Enter the port number used by the RADIUS server.

•

Shared Secret. Enter the Shared Secret key used by the Gateway and RADIUS server.

•

Wireless Encryption Level. An acronym for Wired Equivalent Privacy, WEP is an encryption method used to

protect your wireless data communications. WEP uses 64-bit or 128-bit keys to provide access control to your

network and encryption security for every data transmission. To decode data transmissions, all devices in a

network must use an identical WEP key. Higher encryption levels offer higher levels of security, but due to the

complexity of the encryption, they may decrease network performance. To enable WEP, select

64-Bit

Encryption

or

128-

B

it Encryption

.

•

Default Key. Select which WEP key (1-4) will be used when the Gateway sends data. Make sure that the

receiving device (wireless client) is using the same key.

•

Passphrase for Keys. Instead of manually entering WEP keys, you can enter a passphrase. This passphrase is

used to generate one or more WEP keys. It is case-sensitive and should not be longer than 32 alphanumeric

characters. (This Passphrase function is compatible with Linksys wireless products only and cannot be used

with Windows XP Zero Configuration. If you want to communicate with non-Linksys wireless products or

Windows XP Zero Configuration, make a note of the WEP key you want to use, and enter it manually in the

wireless client.) After you enter the Passphrase, click the

Generate Keys

button to create WEP keys.

•

Wireless WEP Keys #1-4. WEP keys enable you to create an encryption scheme for wireless network

transmissions. If you are not using a Passphrase, then manually enter a set of values. (Do not leave a key field

blank.) If you are using 64-bit WEP encryption, the key must be exactly 10 hexadecimal characters in length.

If you are using 128-bit WEP encryption, the key must be exactly 26 hexadecimal characters in length. Valid

hexadecimal characters are “0”-“9” and “A”-“F”.

When finished making your changes on this tab, click the

Save Settings

button to save these changes, or click

the

Cancel Changes

button to undo your changes.

wep

(wired equivalent privacy): a method of

encrypting network data transmitted on a

wireless network for greater security.

28

Chapter 5: Configuring the Wireless-G Cable Gateway

The Wireless Tab

Wireless-G Cable Gateway

WEP. WEP is a basic encryption method, which is not as secure as WPA. To use WEP, select

WEP

from the

Security

Mode

drop-down menu. Select a level of WEP encryption,

64-Bit Encryption

or

128-Bit Encryption

. Then select

a Default Key (choose which Key to use). Then either generate a WEP key using a Passphrase or enter the WEP

key manually.

•

Wireless Encryption Level. An acronym for Wired Equivalent Privacy, WEP is an encryption method used to

protect your wireless data communications. WEP uses 64-bit or 128-bit keys to provide access control to your

network and encryption security for every data transmission. To decode data transmissions, all devices in a

network must use an identical WEP key. Higher encryption levels offer higher levels of security, but due to the

complexity of the encryption, they may decrease network performance. To enable WEP, select

64-Bit

Encryption

or

128-

B

it Encryption

.

•

Default Key. Select which WEP key (1-4) will be used when the Gateway sends data. Make sure that the

receiving device (wireless client) is using the same key.

•

Passphrase for Keys. Instead of manually entering WEP keys, you can enter a passphrase. This passphrase is

used to generate one or more WEP keys. It is case-sensitive and should not be longer than 32 alphanumeric

characters. (This Passphrase function is compatible with Linksys wireless products only and cannot be used

with Windows XP Zero Configuration. If you want to communicate with non-Linksys wireless products or

Windows XP Zero Configuration, make a note of the WEP key you want to use, and enter it manually in the

wireless client.) After you enter the Passphrase, click the

Generate Keys

button to create WEP keys.

•

Wireless WEP Keys #1-4. WEP keys enable you to create an encryption scheme for wireless network

transmissions. If you are not using a Passphrase, then manually enter a set of values. (Do not leave a key field

blank.) If you are using 64-bit WEP encryption, the key must be exactly 10 hexadecimal characters in length.

If you are using 128-bit WEP encryption, the key must be exactly 26 hexadecimal characters in length. Valid

hexadecimal characters are “0”-“9” and “A”-“F”.

When finished making your changes on this tab, click the

Save Settings

button to save these changes, or click

the

Cancel Changes

button to undo your changes.

Figure 5-13: WEP

29

Chapter 5: Configuring the Wireless-G Cable Gateway

The Wireless Tab

Wireless-G Cable Gateway

Wireless Network Access Tab

Wireless Network Access. If this function is enabled, only the computers on the list will be allowed access to the

wireless network. To add a computer to the network, click

Enable

to enable the function. Then, enter the MAC

addresses in the fields provided, You can also click the

Select MAC Address From Networked Computers

button.

Select the MAC Address(es) you want from the list, and click the

Add

button. Click the

Refresh

button if you want

to refresh the on-screen information. Click the

Close

button to return to the previous screen.

When finished making your changes on this tab, click the

Save Settings

button to save these changes, or click

the

Cancel Changes

button to undo your changes.

Figure 5-14: Wireless Network Access

Figure 5-15: MAC Address Access List

mac address:

the unique address that a manufacturer

assigns to each networking device.