Linksys WRT54GS2 Router Manual PDF (Setup & Configuration Guide)

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Chapter 3

Advanced Configuration

Wireless-G Broadband Router with SpeedBooster

Select the type of algorithm,

AES

, or

TKIP + AES

. The

default selection is

AES

WPA Shared Key

Enter a WPA Shared Key of 8-63

characters.

Group Key Renewal

Enter a Group Key Renewal period,

which instructs the Router how often it should change the

encryption keys. The default Group Key Renewal period is

3600

seconds.

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 Router.)

Security Mode > WPA Enterprise

WPA Algorithm

WPA supports the TKIP encryption

method, with dynamic encryption keys.

RADIUS Server Address

Enter the IP Address of the

RADIUS server.

RADIUS Port

Enter the port number of the RADIUS

server. The default value is

1812

Shared Key

Enter the key shared between the Router

and the server.

Key Renewal Timeout

Enter a Key Renewal Timeout

period, which instructs the Router how often it should

change the encryption keys. The default Key Renewal

Timeout period is

3600

seconds.

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 Router.

Security Mode > WPA2 Enterprise

WPA

Algorithm

WPA2

supports

two

encryption

methods, TKIP and AES, with dynamic encryption keys.

Select the type of algorithm,

AES

, or

TKIP + AES

. The

default selection is

AES

RADIUS Server Address

Enter the IP Address of the

RADIUS server.

RADIUS Port

Enter the port number of the RADIUS

server. The default value is

1812

Shared Key

Enter the key shared between the Router

and the server.

Key Renewal Timeout

Enter a Key Renewal Timeout

period, which instructs the Router how often it should

change the encryption keys. The default Key Renewal

Timeout period is

3600

seconds.

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 Router.)

Security Mode > RADIUS

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Chapter 3

Advanced Configuration

Wireless-G Broadband Router with SpeedBooster

IMPORTANT:

If you are using WEP encryption,

always remember that each device in your

wireless network MUST use the same WEP

encryption method and encryption key, or else

your wireless network will not function properly.

RADIUS Server Address

Enter the IP Address of the

RADIUS server.

RADIUS Port

Enter the port number of the RADIUS

server. The default value is

1812

Shared Key

Enter the key shared between the Router

and the server.

WEP Encryption

Select a level of WEP encryption,

64 bits 10 hex digits

128 bits 26 hex digits

. The

default is

64 bits 10 hex digits

Passphrase

Enter a Passphrase to automatically generate

WEP keys. Then click

Generate

Key 1

If you did not enter a Passphrase, enter the WEP

key manually.

WEP

WEP is a basic encryption method, which is not as secure

as WPA.

Security Mode > WEP

WEP Encryption

Select a level of WEP encryption,

64 bits

10 hex digits

128 bits 26 hex digits

. The default is

64 bits 10 hex digits

Passphrase

Enter a Passphrase to automatically generate

WEP keys. Then click

Generate

Key 1

If you did not enter a Passphrase, enter the WEP

key manually.

Click

Save Settings

to apply your changes, or click

Cancel

Changes

to cancel your changes.

Wireless > Wireless MAC Filter

Wireless access can be filtered by using the MAC addresses

of the wireless devices transmitting within your network’s

radius.

Wireless > Wireless MAC Filter

Wireless MAC Filter

To filter wireless users by MAC Address,

either permitting or blocking access, click

Enable

. If you do

not wish to filter users by MAC Address, keep the default

setting,

Disable

Prevent

Select this

to block wireless access by MAC

Address. This button is selected by default.

Permit Only

Select this to allow wireless access by MAC

Address. This button is not selected by default.

Edit MAC Filter List

Click this to open the

MAC Address

Filter List

screen. On this screen, you can list users, by MAC

Address, to whom you wish to provide or block access. For

easy reference, click

Wireless Client MAC List

to display a list

of network users by MAC Address

MAC Address Filter List

The

Wireless Client MAC List

screen shows computers and

other devices on the wireless network. The list displays

Active PC and Inactive PC sections. Client Host Name,

IP Address, and MAC Address are displayed for each

computer.

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Chapter 3

Advanced Configuration

Wireless-G Broadband Router with SpeedBooster

Select

Enable Address Filter

List for any device you want

to add to the MAC Address Filter List. Then click

Update

Filter List

To retrieve the most up-to-date information, click

Refresh

To exit this screen and return to the

MAC Address Filter List

screen, click

Wireless Client MAC List

Click

Save Settings

to apply your changes, or click

Cancel

Changes

to cancel your changes.

Wireless > Advanced Wireless Settings

This

Wireless > Advanced Wireless Settings

screen is used

to set up the Router’s advanced wireless functions. These

settings should only be adjusted by an expert administrator

as incorrect settings can reduce wireless performance.

Wireless > Advanced Wireless Settings

Advanced Wireless

Authentication Type

The default is set to

Auto

, which

allows either Open System or Shared Key authentication

to be used. With

Shared Key

authentication, the sender

and recipient use a WEP key for authentication.

Basic Rate

The Basic Rate setting is not actually one rate

of transmission but a series of rates at which the Router

can transmit. The Router will advertise its Basic Rate to the

other wireless devices in your network, so they know which

rates will be used. The Router will also advertise that it will

automatically select the best rate for transmission. The

default setting is

Default

, when the Router can transmit

at all standard wireless rates (1-2Mbps, 5.5Mbps, 11Mbps,

18Mbps, and 24Mbps). Other options are

1-2Mbps

, for

use with older wireless technology, and

All

, when the

Router can transmit at all wireless rates. The Basic Rate

is not the actual rate of data transmission. If you want to

specify the Router’s rate of data transmission, configure

the Transmission Rate setting.

Transmission Rate

The rate of data transmission should

be set depending on the speed of your wireless network.

You can select from a range of transmission speeds, or you

can select

Auto

to have the Router automatically use the

fastest possible data rate and enable the Auto-Fallback

feature. Auto-Fallback will negotiate the best possible

connection speed between the Router and a wireless

client. The default value is

Auto

CTS Protection Mode

CTS (Clear-To-Send) Protection

Mode should remain disabled unless you are having severe

problems with your Wireless-G products not being able

to transmit to the Router in an environment with heavy

802.11b traffic. This function boosts the Router’s ability

to catch all Wireless-G transmissions but will severely

decrease performance. To use the CTS Protection Mode

option, select

Auto

. The default is

Disable

Frame Burst

Enabling this option should provide your

network with greater performance, depending on the

manufacturer of your wireless products. To use the Frame

Burst option, select

Enable

. The default is

Disable

Beacon Interval

The default value is

100

. Enter a value

between 1 and 65,535 milliseconds. The Beacon Interval

value indicates the frequency interval of the beacon. A

beacon is a packet broadcast by the Router to synchronize

the wireless network.

DTIM Interval

This value, between 1 and 255, indicates

the interval of the Delivery Traffic Indication Message

(DTIM). A DTIM field is a countdown field informing

clients of the next window for listening to broadcast

and multicast messages. When the Router has buffered

broadcast or multicast messages for associated clients, it

sends the next DTIM with a DTIM Interval value. Its clients

hear the beacons and awaken to receive the broadcast

and multicast messages. The default value is

Fragmentation

Threshold

This

value

specifies

the

maximum size for a packet before data is fragmented

into multiple packets. If you experience a high packet

error rate, you may slightly increase the Fragmentation

Threshold. Setting the Fragmentation Threshold too low

may result in poor network performance. Only minor

reduction of the default value is recommended. In most

cases, it should remain at its default value of

2346

RTS Threshold

Should you encounter inconsistent data

flow, only minor reduction of the default value,

2347

, is

recommended. If a network packet is smaller than the

preset RTS threshold size, the RTS/CTS mechanism will

not be enabled. The Router sends Request to Send (RTS)

frames to a particular receiving station and negotiates

the sending of a data frame. After receiving an RTS, the

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Chapter 3

Advanced Configuration

Wireless-G Broadband Router with SpeedBooster

wireless station responds with a Clear to Send (CTS) frame

to acknowledge the right to begin transmission. The RTS

Threshold value should remain at its default value of

2347

AP Isolation

This isolates all wireless clients and wireless

devices on your network from each other. Wireless devices

will be able to communicate with the Router but not with

each other. To use this function, select

. AP Isolation is

turned

Off

by default.

Click

Save Settings

to apply your changes, or click

Cancel

Changes

to cancel your changes.

Security > Firewall

The

Security > Firewall

screen is used to configure a firewall

that can filter out various types of unwanted traffic on the

Router’s local network.

Security > Firewall

Firewall

Block WAN Requests

Block

Anonymous

Internet

Requests

This

feature

makes it more difficult for outside users to work their

way into your network. This feature is selected

by default.

Deselect the feature to allow anonymous Internet

requests

Filter

Multicast

Multicasting

allows

for

multiple

transmissions to specific recipients at the same time. If

multicasting is permitted, then the Router will allow IP

multicast packets to be forwarded to the appropriate

computers. This feature is selected by default. Deselect

this feature to disable it.

Filter

Internet

NAT

Redirection

This

feature

uses

port forwarding to block access to local servers from

local networked computers. Select

Filter Internet NAT

Redirection

to filter Internet NAT redirection. This feature

is not selected by default.

Filter IDENT (Port 113)

This feature keeps port 113 from

being scanned by devices outside of your local network.

This feature is selected by default. Deselect this feature to

disable it.

Click

Save Settings

to apply your changes, or click

Cancel

Changes

to cancel your changes.

Security > VPN

The

Security > VPN Passthrough

screen allows you to enable

VPN tunnels using IPSec, PPTP, or L2TP protocols to pass

through the Router’s firewall.

Security > VPN Passthrough

VPN Passthrough

IPSec Passthrough

Internet Protocol Security (IPSec) is

a suite of protocols used to implement secure exchange

of packets at the IP layer. To allow IPSec tunnels to pass

through the Router, keep the default,

Enable

PPTP Passthrough

Point-to-Point Tunneling Protocol

(PPTP) allows the Point-to-Point Protocol (PPP) to be

tunneled through an IP network. To allow PPTP tunnels to

pass through the Router, keep the default,

Enable

L2TP Passthrough

Layer 2 Tunneling Protocol is the

method used to enable Point-to-Point sessions via the

Internet on the Layer 2 level. To allow L2TP tunnels to pass

through the Router, keep the default,

Enable

Click

Save Settings

to apply your changes, or click

Cancel

Changes

to cancel your changes.

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Chapter 3

Advanced Configuration

Wireless-G Broadband Router with SpeedBooster

Access Restrictions > Internet Access

The

Access Restrictions > Internet Access

screen allows you

to block or allow specific kinds of Internet usage and

traffic, such as Internet access, designated services, and

websites during specific days and times.

Access Restrictions > Internet Access

Internet Access

Internet Access Policy

Access can be managed by a

policy. Use the settings on this screen to establish an

access policy (after

Save Settings

is clicked). Selecting a

policy from the drop-down menu will display that policy’s

settings. To delete a policy, select that policy’s number

and click

Delete

. To view all the policies, click

Summary

(Policies can be deleted from the

Summary

screen by

selecting the policy or policies and clicking

Delete

. To

return to the Internet Access tab, click

Internet Policy Summary

Status

Policies are disabled by default. To enable a policy,

select the policy number from the drop-down menu, and

select

Enable

To create an Internet Access policy:

Select a number from the

Internet Access Policy

drop-

down menu.

To enable this policy, select

Enable

Enter a Policy Name in the field provided.

Click

Edit List of PCs

to select which computers will be

affected by the policy. The

List of PCs

screen appears. You

can select a computer by MAC Address or IP Address.

You can also enter a range of IP Addresses if you want

this policy to affect a group of computers. After making

your changes, click

Save Settings

to apply your changes

Cancel Changes

to cancel your changes. Then click

List of PCs

Select

the

appropriate

option,

Deny

Allow

depending on whether you want to block or allow

Internet access for the computers you listed on the

List

of PCs

screen.

Decide which days and what times you want this policy

to be enforced. Select the individual days during which

the policy will be in effect, or select

Everyday

. Then

enter a range of hours and minutes during which the

policy will be in effect, or select

24 Hours

Select any Blocked Services or Website Blocking you

wish to use.

Click

Save Settings

to save the policy’s settings, or

click

Cancel Changes

to cancel the policy’s settings.

Blocked Services

You can filter access to various services accessed over the

Internet, such as FTP or telnet, by selecting services from

the drop-down menus next to

Blocked Services

. (You can

block up to 20 services.) Then enter the range of ports you

want to filter.

If the service you want to block is not listed or you want to

edit a service’s settings, then click

Add/Edit Service

. Then

the

Port Services

screen will appear.

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