Remote Authentication Dial-In User Service
A networking protocol, operating on port 1812, that provides centralized Authentication, Authorization, and Accounting (AAA or Triple A) management for users who connect and use a network service. RADIUS was developed by Livingston Enterprises, Inc. in 1991 as an access server authentication and accounting protocol and later brought into the Internet Engineering Task Force (IETF) standards.
How RADIUS Server Authentication Works
Radius Servers for ISP RADIUS is a protocol that was originally designed to authenticate remote users to a dial-in access server. RADIUS is now used in a wide range of authentication scenarios. RADIUS is a client-server protocol, with the Firebox as the client and the RADIUS server as the server. (The RADIUS client is sometimes called the Network Access Server or NAS.) When a user tries to authenticate, the device sends a message to the RADIUS server.
What does RADIUS Integrate With
Radius Servers for ISP For example, FreeRADIUS has an extremely flexible nature that includes a vast array of configuration options that make it daunting to work with. In addition, actually implementing FreeRADIUS includes integrating it with a directory service, WAPs (wireless access points), routers, switches, and ensuring that each endpoint is running the proper RADIUS protocol. It’s a lot of work, and many IT admins want to save time and money by offloading that work to a SaaS provider.