ZyXEL Communications ZyAIR G-3000, User Manual

Page: 81 / 222

ZyAIR G-3000 User’s Guide
Chapter 6 Wireless Security 82
Figure 33 EAP Authentication
The details below provide a general description of how IEEE 802.1x EAP authentication
works. For an example list of EAP-MD5 authentication steps, see the IEEE 802.1x appendix.
1 The wireless station sends a “start” message to the ZyAIR.
2 The ZyAIR sends a “request identity” message to the wireless station for identity
information.
3 The wireless station replies with identity information, including username and password.
4 The RADIUS server checks the user information against its user profile database and
determines whether or not to authenticate the wireless station.
6.9 Dynamic WEP Key Exchange
The AP maps a unique key that is generated with the RADIUS server. This key expires when
the wireless connection times out, disconnects or reauthentication times out. A new WEP key
is generated each time reauthentication is performed.
If this feature is enabled, it is not necessary to configure a default WEP encryption key in the
Wireless screen. You may still configure and store keys here, but they will not be used while
Dynamic WEP is enabled.
To use Dynamic WEP, enable and configure the RADIUS server (see Figure 6.20 ) and enable
Dynamic WEP Key Exchange in the 802.1x screen. Ensure that the wireless station’s EAP
type is configured to one of the following:
• EAP-TLS
• EAP-TTLS
• PEAP
Note: EAP-MD5 cannot be used with Dynamic WEP Key
Exchange.