Wireless Security.pdf - PDF Archive

Implementing Basic Wireless Security 469
Figure 20.2 : A unique AP name and SSID are set
numbers, and special characters. Additionally, using nonprintable characters will cause
some WarDriving applications to crash or identify the SSID incorrectly.
20.2.2 Disabling SSID Broadcast
After you have set a unique SSID on your access point, the next step is to disable the
SSID broadcast. By default, access points transmit a beacon to let wireless users know
that they are there. Active scanners such as NetStumbler rely on this beacon to find
access points. By disabling the SSID broadcast, you have effectively placed your access
point in stealth , also known as cloaked , mode.
To disable the SSID broadcast, first click the Advanced tab on the initial setup screen.
This will take you to the screen shown in Figure 20.3 .
Next, click the Wireless tab to bring up the advanced wireless settings, as shown in
Figure 20.4 .
Select the Disable radio button, and then click Apply to save your settings. Passive
scanners, such as Kismet and AirSnort, have the ability to detect cloaked access points,
but disabling SSID broadcast is one more step toward an effective overall security
posture.
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