Hi Benny, I have come across the following strange situation: I have a soft phone running and trying to register to PJSUA, when PJSUA starts with STUN it gets a Message too long (WSAEMSGSIZE) error and quits. It does not happen if I don't use STUN, and it does not happen if I shut the soft phone down. The registration details of the soft phone are invalid. Included is the wire-shark trace you can see the soft phone trying to register, and ICMP indicating the port is not open. When PJSUA starts you see it send the Stun binding request, BUT very strange ICMP continue to reply unreachable.... (the port should be open by now ?) The largest packet on the wire is 753 bytes. I can reproduce the error, please advise if any further logs or tests would be useful. This can lead to DOS attacks. Regards Lafras -------------- next part -------------- A non-text attachment was scrubbed... Name: incomming register makes STUN - Message to long.pcap Type: application/octet-stream Size: 44818 bytes Desc: not available Url : http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20071123/57dac74d/attachment-0001.obj -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: sip log.txt Url: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20071123/57dac74d/attachment-0001.txt