I am sorry for the letter last. because i did not read your code carefully . your stun client imp rfc5389 and stunserver.org only support rfc3489. so it can not parse the protocol of stun2. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090923/a2783cb5/attachment.html>