Hi, all I do p2p with pjnath ICE , and it works well on LAN, but it always outputs the following information: 23:03:14.639 udprel00AF18A8 CreatePermission failed for IP 192.168.1.93: 400/Ba d Request 23:03:17.139 udprel00AF18A8 CreatePermission failed for IP 192.168.1.93: 400/Ba d Request 23:03:17.504 udprel00AF18A8 CreatePermission failed for IP 112.20.84.185: 400/B ad Request ................. I do it as the document(http://www.pjsip.org/pjnath/docs/html/group__PJNATH__ICE.htm) said. Can anybody give me some hints? Thanks. Robert Xia