ZyXEL Communications 5 Series User Manual

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 Chapter 12 Wireless Screens
ZyWALL 5/35/70 Series User’s Guide
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The RADIUS server then checks the user's identification against its database and grants 
or denies network access accordingly.
The RADIUS server distributes a Pairwise Master Key (PMK) key to the AP that then 
sets up a key hierarchy and management system, using the pair-wise key to dynamically 
generate unique data encryption keys to encrypt every data packet that is wirelessly 
communicated between the AP and the wireless clients.
Figure 141   WPA with RADIUS Application Example
Wireless Client WPA Supplicants
A wireless client supplicant is the software that runs on an operating system instructing the 
wireless client how to use WPA. At the time of writing, the most widely available supplicants 
are the WPA patch for Windows XP, Funk Software's Odyssey client, and Meetinghouse Data 
Communications' AEGIS client. 
The Windows XP patch is a free download that adds WPA capability to Windows XP's built-
in "Zero Configuration" wireless client. However, you must run Windows XP to use it.