A high performance free RADIUS and the most popular open source RADIUS server is the most widely deployed RADIUS server in the world. Supports all common authentication protocols. It is the basis for many commercial RADIUS products and services, like embedded systems. It supplies the AAA needs of many Fortune-500 companies, telcos and Tier 1 ISPs. The server is fast, feature-rich, modular, and scalable. RADIUS is often used by ISPs and enterprises to manage access to the Internet or internal networks, wireless networks, and integrated e-mail services.