Short description of Radl Free Radius server 1.5: The main goal of the Radius server (Remote Authentication Dial-In User Service) is to centralize the authentication information (name, password, keys ..) attached to users. It is frequently used with Remote Access Server equipments and Dial-in users. This Program is the server part of the Radius client/server architecture. RADIUS is described in RFC 2865. RADIUS protocol Uses User Datagram Protocol (UDP) messages (port 1812 is used for RADIUS