Depending upon the protocol, there are different ways to authenticate a user in this client/server architecture. The traditional authentication protocols are Password Authentication Protocol (PAP), Challenge Handshake Authentication Protocol (CHAP), and a newer method referred to as Extensible Authentication Protocol (EAP). Each of these authentication protocols is discussed at length in Chapter 6.

RADIUS

So, I have to run across half of a circle to be authenticated?

Response: Don’t know. Give it a try.

Remote Authentication Dial-In User Service (RADIUS) is a network protocol that provides client/server authentication and authorization, and audits remote users. A network may have access servers, a modem pool, DSL, ISDN, or T1 line dedicated for ...

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