Hi, I'm using IAX2 to connect remote users to my asterisk server. Both server and user are behind a nat. But sometimes the user registrates correctly but sometimes doesn't. Doing a debug i got: Packet arrived out of order (expecting 1, got 0) (frametype = 6, subclass = 13) Acking anyway Sending 3 on 5/4132 to 200.31.126.250:4569 Sending 15 on 5/4132 to 200.31.126.250:4569 Received packet 0, (6, 13) Packet arrived out of order (expecting 1, got 0) (frametype = 6, subclass = 13) Acking anyway Sending 3 on 5/4132 to 200.31.126.250:4569 Received packet 0, (6, 13) Packet arrived out of order (expecting 1, got 0) (frametype = 6, subclass = 13) Acking anyway Sending 3 on 2/4131 to 200.31.126.250:4569 Urgent handler Sending 10002 on 2/4131 to 200.31.126.250:4569 Where 200.31.126.250 is the public IP of the user. Any ideas what can be wrong? Regards, -- Diego Quintana a.k.a. RouterMaN Ingenier?a de las Telecomunicaciones PUCP Linux Registered User #382615 - http://counter.li.org/ SIP # 1-747-633-6676 Ext. 1011 FWD # 764839 Ext. 1011 http://routerman.blogsome.com http://planeta.debianperu.org