ZyXEL Communications MWR222 - V1.0 Manual page 267

• Accounting
Keeps track of the client's network activity.
RADIUS is a simple package exchange in which your AP acts as a message relay
between the wireless station and the network RADIUS server.
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.
Types of Authentication
This appendix discusses some popular authentication types: EAP-MD5, EAP-
TLS, EAP-TTLS, PEAP and LEAP.
The type of authentication you use depends on the RADIUS server or the AP.
Consult your network administrator for more information.
MWR222 User's Guide
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