Hi All, GNU GK is capable of using external radius for authentication of h.323 endpoint like open-phone. It works perfect for CHAP password based authentication. Are there any other modes of authentication available like PAP or is it possible that the challenge used in CHAP protocol is returned by radius server ? If radius sends challenge on first request of authenticaiton, and user builds CHAP password based on the challenge returned by radius and use that encrypted password? Thanks in advance. ~~~~~~~~~~~~~~~~~~~~~~~ Jawad Bokhari Software Engineer Advance Communications Phone: +1 (213) 341 1431 ~~~~~~~~~~~~~~~~~~~~~~~ ------------------------------------------------------- This SF.Net email is sponsored by Sleepycat Software Learn developer strategies Cisco, Motorola, Ericsson & Lucent use to deliver higher performing products faster, at low TCO. http://www.sleepycat.com/telcomwpreg.php?From=osdnemail3 _______________________________________________________ List: Openh323gk-users@xxxxxxxxxxxxxxxxxxxxx Archive: http://sourceforge.net/mailarchive/forum.php?forum_id=8549 Homepage: http://www.gnugk.org/