ZyXEL MAX318M User Guide - Page 208

Types of RADIUS Messages, Diameter, Security Association, Appendix A WiMAX Security

Page 208 highlights

Appendix A WiMAX Security • Authorization Determines the network services available to authenticated users once they are connected to the network. • Accounting Keeps track of the client's network activity. RADIUS is a simple package exchange in which your base station acts as a message relay between the MS/SS and the network RADIUS server. Types of RADIUS Messages The following types of RADIUS messages are exchanged between the base station and the RADIUS server for user authentication: • Access-Request Sent by an base station 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 base station sends a proper response from the user and then sends another Access-Request message. The following types of RADIUS messages are exchanged between the base station and the RADIUS server for user accounting: • Accounting-Request Sent by the base station 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. Diameter Diameter (RFC 3588) is a type of AAA server that provides several improvements over RADIUS in efficiency, security, and support for roaming. Security Association The set of information about user authentication and data encryption between two computers is known as a security association (SA). In a WiMAX network, the process of security association has three stages. 208 WiMAX Device Configuration User's Guide

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Appendix A WiMAX Security
WiMAX Device Configuration User’s Guide
208
• Authorization
Determines the network services available to authenticated users once they are connected to the
network.
• Accounting
Keeps track of the client’s network activity.
RADIUS is a simple package exchange in which your base station acts as a message relay between
the MS/SS and the network RADIUS server.
Types of RADIUS Messages
The following types of RADIUS messages are exchanged between the base station and the RADIUS
server for user authentication:
• Access-Request
Sent by an base station 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 base station
sends a proper response from the user and then sends another Access-Request message.
The following types of RADIUS messages are exchanged between the base station and the RADIUS
server for user accounting:
• Accounting-Request
Sent by the base station 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.
Diameter
Diameter (RFC 3588) is a type of AAA server that provides several improvements over RADIUS in
efficiency, security, and support for roaming.
Security Association
The set of information about user authentication and data encryption between two computers is
known as a security association (SA). In a WiMAX network, the process of security association has
three stages.