Remote Authentication Dial-In User Service (RADIUS)

RADIUS protocol uses ports 1812 and 1813

For authentication and authorization, the RADIUS user sends a request to the Network Access Sever (NAS) for access to a network resource.

For accounting, the RADIUS user sends a request to the RADIUS Accounting server, using Start, Update and Stop to provide information on the session duration and usage.

RADIUS specifies Access-Request for authentication and authorization, and Accounting-Request for accounting:

‍

‍Access

Message Requests:

• Access-Request

Message Responses:

• Access-Accept
• Access-Challenge
• Access-Reject

‍

Accounting

Message Requests:

• Accounting-Request

Message Responses:

• Accounting-Response

‍