Support for authentication against a RADIUS server This is similar to the rlm_digest support for SIP authentication. However, TURN uses HMAC instead of DIGEST, so it requires a different module to be created in the RADIUS server.
http://www.resiprocate.org/ReTurn_Server_Asynchronous_Authentication http://www.resiprocate.org/RADIUS http://www.resiprocate.org/Improving_RADIUS_Support