ZyXEL ZyWALL 5 User Guide - Page 244
Technical Reference, IRADIUS, EAP Authentication
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Chapter 12 Wireless Screens 12.4 Technical Reference IRADIUS RADIUS user is a simple package exchange in which your ZyWALL acts as a message relay between the wireless station and the network RADIUS server. See RFC 2138 and RFC 2139 for more on RADIUS. Types of RADIUS Messages The following types of RADIUS messages are exchanged between the access point and the RADIUS server for user authentication: • Access-Request Sent by an access point requesting authentication. • Access-Reject Sent by a RADIUS server rejecting access. • Access-Accept Sent by a RADIUS server allowing access. • Access-Challenge Sent by a RADIUS server requesting more information in order to allow access. The access point sends a proper response from the user and then sends another Access-Request message. The following types of RADIUS messages are exchanged between the access point and the RADIUS server for user accounting: • Accounting-Request Sent by the access point requesting accounting. • Accounting-Response Sent by the RADIUS server to indicate that it has started or stopped accounting. In order to ensure network security, the access point and the RADIUS server use a shared secret key, which is a password, they both know. The key is not sent over the network. In addition to the shared key, password information exchanged is also encrypted to protect the network from unauthorized access. EAP Authentication The following figure shows an overview of authentication when you specify a RADIUS server on your access point. 244 ZyWALL 5/35/70 Series User's Guide
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