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Chapter 5: Configuring the Wireless-G Broadband Router

The Wireless Tab - Basic Wireless Settings

Wireless-G Broadband Router with SRX200

The Wireless Tab - Basic Wireless Settings

The basic settings for wireless networking are set on this screen.

Wireless Network

Wireless Network Mode

. From this drop-down menu, you can select the wireless standards running on your

network. If you have both 802.11g and 802.11b devices in your network, keep the default setting,

Mixed

. If you

have only 802.11g devices, select

G-Only

. If you do not have any 802.11g and 802.11b devices in your network,

select

Disable

. SRX200 works automatically with Mixed or G-Only mode, providing the added bonus of increased

speed across your entire network and even greater speed when using SRX-enabled products only.

Wireless Network Name (SSID)

. The SSID is the network name shared among all points in a wireless network.

The SSID must be identical for all devices in the wireless network. It is case-sensitive and must not exceed 32

characters (use any of the characters on the keyboard). Make sure this setting is the same for all points in your

wireless network. For added security, you should change the default SSID (

linksys

) to a unique name.

Wireless Channel

. Select the appropriate channel from the list provided to correspond with your network

settings. All devices in your wireless network must be broadcast on the same channel in order to function

correctly and to avoid interference with other wireless items in your home. In most cases, you should keep the

default,

Auto

, so the Router will automatically use the channel that has the least activity.

Adaptive Channel Expansion

. This feature increases the RF (radio frequency) bandwidth, so data rates are

increased. The existing 20 MHz bandwidth is increased to up to 40 MHz by combining adjacent channels. In most

cases, keep the default setting,

Auto

, so the Router automatically adjusts the increase depending on the

channels available.

Wireless SSID Broadcast

. When wireless clients survey the local area for wireless networks to associate with,

they will detect the SSID broadcast by the Router. To broadcast the Router's SSID, keep the default setting,

Enable

. To be more secure and not broadcast the Router's SSID, then select

Disable

.

Change these settings as described here and click the

Save Settings

button to apply your changes or

Cancel

Changes

to cancel your changes.

Figure 5-17: Wireless Tab - Basic Wireless Settings

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Chapter 5: Configuring the Wireless-G Broadband Router

The Wireless Tab - Wireless Security

Wireless-G Broadband Router with SRX200

The Wireless Tab - Wireless Security

The Wireless Security settings configure the security of your wireless network. There are five wireless security

mode options supported by the Router: WPA-Personal, WPA2 Personal, WPA Enterprise, WPA2 Enterprise, and

WEP. (WPA stands for Wi-Fi Protected Access, WEP stands for Wired Equivalent Privacy, and WPA Enterprise uses

a RADIUS (Remote Authentication Dial-In User Service) server. WPA is a security standard stronger than WEP

encryption. WPA2 is stronger than WPA. These options are briefly discussed here. For detailed instructions on

configuring wireless security for the Router, turn to “Appendix B: Wireless Security.”

Wireless Security

Select

WPA/WPA2 Personal

,

WPA/WPA2 Enterprise

, or

WEP

from the

Security Mode

drop-down menu. Then

proceed to the appropriate instructions. If you do not want to enable wireless security, select

Disable

.

WPA/WPA2 Personal

. Two WPA Personal options are available. To select WPA or WPA2 Personal, select

Enable

from the drop-down menu next to the desired option. WPA/WPA2 Personal gives you two encryption methods,

TKIP and AES, with dynamic encryption keys. Select the type of algorithm,

TKIP

or

AES

. Enter a Personal Key of

8-63 characters. Then enter a Group Key Renewal period, which instructs the Router how often it should change

the encryption keys.

WPA/WPA2 Enterprise

. This option features WPA/WPA2 used in coordination with a RADIUS server. (This should

only be used when a RADIUS server is connected to the Router.) Two WPA Enterprise options are available. To

select WPA or WPA2 Enterprise, select

Enable

from the drop-down menu next to the desired option. Then, select

the type of WPA algorithm you want to use,

TKIP

or

AES

. Enter the RADIUS server’s IP Address and port number,

along with an Enterprise Key shared between the Router and the server. Last, enter a Key Renewal Timeout,

which instructs the Router how often it should change the encryption keys.

Figure 5-18: Wireless Tab - Wireless Security (WPA/WPA

Personal)

Figure 5-19: Wireless Tab - Wireless Security

(WPA/WPA2 Enterprise)

IMPORTANT:

If you are using wireless security, always remember that

each device in your wireless network MUST use the same wireless security

method and shared key, or else the network will not function correctly. You

may mix between WPA and WPA2 Personal or WPA and WPA2 Enterprise,

but not between Personal and Enterprise, Personal and WEP, or Enterprise

and WEP.

encryption

: encoding data transmitted in a network

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Chapter 5: Configuring the Wireless-G Broadband Router

The Wireless Tab - Wireless Security

Wireless-G Broadband Router with SRX200

WEP

. WEP is a basic encryption method, which is not as secure as WPA or WPA2. To use WEP, select a Default

Transmit Key (choose which Key to use), and a level of WEP encryption,

64 bits 10 hex digits

or

128 bits 26 hex

digits

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

Change these settings as described here and click the

Save Settings

button to apply your changes or

Cancel

Changes

to cancel your changes. For detailed instructions on configuring wireless security for the Router, turn to

“Appendix B: Wireless Security.”

Figure 5-20: Wireless Tab - Wireless Security (WEP)

IMPORTANT:

If you are using wireless security, always remember that

each device in your wireless network MUST use the same wireless security

method and shared key, or else the network will not function correctly. You

may mix between WPA and WPA2 Personal or WPA and WPA2 Enterprise,

but not between Personal and Enterprise, Personal and WEP, or Enterprise

and WEP.

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Chapter 5: Configuring the Wireless-G Broadband Router

The Wireless Tab - Wireless MAC Filter

Wireless-G Broadband Router with SRX200

The Wireless Tab - Wireless MAC Filter

Wireless access can be filtered by using the MAC addresses of the wireless devices transmitting within your

network.

Wireless MAC Filter

Wireless MAC Filter

. This screen lets you filter wireless users by MAC Address. If you do not wish to filter users

by MAC Address, select

Disable

.

Permit Only

. Clicking this button will allow wireless access by computers with specified MAC Addresses.

There are 50 fields provided in which you can list users, by MAC Address, whose access you wish to allow. Just

enter the MAC Address for the PC whose access you want to allow in one of the fields. For a more convenient way

to add MAC addresses, click the

Select

MAC Address From Networked Computers

button. The

Networked

Computers

screen will appear. Select the MAC Addresses you want. Then click the

Select

button. Click the

Refresh

button if you want to refresh the screen. Click the

Close Window

button to return to the previous screen.

Change these settings as described here and click the

Save Settings

button to apply your changes or

Cancel

Changes

to cancel your changes.

Figure 5-21: Wireless Tab - Wireless MAC Filter

Figure 5-22: Wireless MAC Filter - Networked

Computers

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Chapter 5: Configuring the Wireless-G Broadband Router

The Wireless Tab - Advanced Wireless Settings

Wireless-G Broadband Router with SRX200

The Wireless Tab - Advanced Wireless Settings

This tab 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.

Advanced Wireless

Basic Rate Set

. The Basic Rate is not the actual rate of data transmission; it is a series of rates at which the

Router can transmit. (If you want to specify the Router’s rate of data transmission, configure the Transmission

Rate setting.) The Router will advertise its Basic Rate Set to the other wireless devices in your network, so they

know which rates will be supported. The Router will also advertise that it will automatically select the best rate

for transmission. In most cases, you should keep the default setting,

Basic Rate Set #2

, which includes higher

data rates for higher performance. If your wireless computers or other clients cannot associate with the Router,

select

Basic Rate Set #1

, a set of data rates specified by the 802.11b standard.

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 set to its default,

Auto

, so when your

Wireless-G products are not able to transmit to the Router in an environment with heavy 802.11b traffic, the CTS

Protection Mode will be used. This function boosts the Router’s ability to catch all Wireless-G transmissions but

will severely decrease performance.

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

1

.

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

.

Figure 5-23: Wireless Tab - Advanced Wireless Settings

fragmentation

: breaking a packet into smaller units

when transmitting over a network medium that

cannot support the original size of the packet.

cts

(clear to send): a signal sent by a wireless

device, signifying that it is ready to receive data

beacon interval

: data transmitted on your wireless

network that keeps the network synchronized

dtim

: a message included in data packets

that can increase wireless efficiency.

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