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 authentication messages and UDP port 1813 is used for RADIUS accounting messages).