hi, i use pjnath for nat travel, one pc run as a server, like sip uas, and other pc like uac to connect it, with nat travel. one client connect it is correct, one by one connect ,no wrong with it. but two or more connect at the same time, only last connet is connect suscess. i see the log about cand check. in the same cand ,server check failue, but client check success, like this: server: 11:14:37.907 2f627747d .Check 1: [1] 192.168.170.133:47245-->192.168.170.133:46451 (not nominated): connectivity check FAILED: Unknown error 370401 11:14:37.907 2f627747d ..Check 1: [1] 192.168.170.133:47245-->192.168.170.133:46451: state changed from In Progress to Failed client: 11:14:37.907 2f627747d ..Check 1: [1] 192.168.170.133:46451-->192.168.170.133:47245: state changed from Frozen to In Progress 11:14:37.907 2f627747d .Check 1: [1] 192.168.170.133:46451-->192.168.170.133:47245 (nominated): connectivity check SUCCESS 11:14:37.908 2f627747d .Check 1: [1] 192.168.170.133:46451-->192.168.170.133:47245: state changed from In Progress to Succeeded i have not find error number 370401 in pjlib header. other question is: how to enable epoll with pj_ioqueue in linux, and how to sure it is work, i compile the lib with --enable-epool, but in the program debug is still is 22:13:57.188 pjlib select() I/O Queue created (0x8909284) how to up PJ_IOQUEUE_MAX_HANDLES, the default is 64. yourtear2012 at gmail.com --- ????????????????? avast! ???????????? http://www.avast.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20140716/fcae3122/attachment.html>