How to configure SSH authentication using Radius Server

How to configure SSH authentication using Radius Server

Remote Authentication Dial-In User Service (RADIUS) is a networking protocol that provides centralized authentication, authorization, and accounting (AAA) management for users who connect and use a network service.

RADIUS is an AAA (authentication, authorization, and accounting) protocol that manages network access. RADIUS uses two types of packets to manage the full AAA process: Access-Request, which manages authentication and authorization; and Accounting-Request, which manages accounting.


Usually, a Cisco IOS device implements authentication based on a line password and authorization based on a level 15 enable password. This is a problem for any organization that desires granularity or the ability to track activities back to one of the multiple users that use the network resources. The solution to this is AAA. This allows an administrator to configure granular user access and audit ability to an IOS device.









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