FreeRADIUS is a high-performance RADIUS server with support for: - Authentication by local files, SQL, Kerberos, LDAP, PAM, and more. - Powerful policy configuration language. - Proxying and replicating requests by any criteria. - Support for many EAP types; TLS, PEAP, TTLS, etc. - Many vendor-specific attributes. - Regexp matching in string attributes. and lots more.