ZyXEL G-220 v2 User’s Guide

1First enter identical passwords into the AP and all wireless clients. The Pre-Shared Key (PSK) must consist of between 8 and 63 ASCII characters or 64 hexadecimal characters (including spaces and symbols).

2The AP checks each client's password and (only) allows it to join the network if it matches its password.

3The AP and wireless clients use the pre-shared key to generate a common PMK.

4The AP and wireless clients use the TKIP or AES encryption process to encrypt data exchanged between them.

Figure 11 WPA-PSK Authentication

2.2.5 WPA(2) with RADIUS Application Example

You need the IP address of the RADIUS server, its port number (default is 1812), and the RADIUS shared secret. A WPA(2) application example with an external RADIUS server looks as follows. "A" is the RADIUS server. "DS" is the distribution system.

1The AP passes the wireless client's authentication request to the RADIUS server.

2The RADIUS server then checks the user's identification against its database and grants or denies network access accordingly.

3The 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.

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Chapter 2 Wireless LAN Network