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Windows Server® 2008 TCP/IP Protocols and Services by Joseph Davies

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RADIUS Message Exchanges

This section describes common RADIUS message exchanges for the following:

Authentication of Network Access

The sets of authentication messages exchanged between a RADIUS client and a RADIUS server are the following:

  • Access-Request followed by Access-Accept. This occurs when a RADIUS server successfully authenticates and authorizes a connection on behalf of a RADIUS client. The RADIUS client can commence service to an access client.

  • Access-Request followed by Access-Reject. This occurs when a RADIUS server does not successfully authenticate and authorize a connection on behalf of a RADIUS client. The RADIUS client can then attempt to get new ...

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