Introduction - If you have any usage issues, please Google them yourself
RADIUS is a C/S structure of the agreement, the client is NAS (Net Access Server first) server running RADIUS client software, any computer can become a RADIUS client. Authentication mechanism of RADIUS protocol, can use PAP, CHAP or Unix login authentication etc.. RADIUS is an extensible protocol, all the work which is based on Attribute-Length-Value vector. RADIUS also supports manufacturers extended manufacturer specific attributes.