RADIUS How it Works

1- User initiates PPP authentication to the NAS.

2- NAS prompts for username and password (if PAP) or challenge (if CHAP).

3- User replies.

4- RADIUS client sends username and encrypted password to the RADIUS server.

5- RADIUS server responds with Accept, Reject, or Challenge.

The RADIUS client acts upon services and services parameters bundled with Accept or Reject.

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