RADIUS - Operations

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Before the Client starts communicating with the Radius Server, it is required that the secret key is shared between the Client and the Server and the Client must be configured to use Radius server to get service.

Once Client is configured properly then :

  • The Client starts with Access-Request.

  • The Server sends either Access-Accept, Access-Reject, or Access-Challenge.

  • Access-Accept keeps all the required attributes to provide service to the user.

Radius Codes (decimal) are assigned as follows:

  • 1 Access-Request
  • 2 Access-Accept
  • 3 Access-Reject
  • 4 Accounting-Request
  • 5 Accounting-Response
  • 11 Access-Challenge
  • 12 Status-Server (experimental)
  • 13 Status-Client (experimental)
  • 255 Reserved
  • No Keep Alive concept - Good or Bad??

Codes 4 and 5 are related to Radius Accounting Functionality. Codes 12 and 13 are reserved for possible use.

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