Hello list. I detected a strange behavior with my SER. I downloaded the last stable version from the CVS. And it seems to work ok. But for a particular endpoint the register proccess seems to be corrupted. This is what i have. (please check the PORT for the register) U 200.113.154.25:12196 -> 10.0.0.35:5060 REGISTER sip:sipproxy.mydomain.com SIP/2.0. U 10.0.0.35:5060 -> 200.113.154.25:12196 SIP/2.0 401 Unauthorized. Via: SIP/2.0/UDP 200.113.154.25:12196;branch=z9hG4bK-e4d3ecd4;rport=12196. U 200.113.154.25:12196 -> 10.0.0.35:5060 REGISTER sip:sipproxy.mydomain.com SIP/2.0. U 10.0.0.35:5060 -> 200.113.154.25:12196 SIP/2.0 200 OK. domain: 'location' aor : '5555847110' ~~~Contact(0x42326db8)~~~ domain : 'location' aor : '5555847110' Contact : 'sip:5555847110@200.113.154.25:121962196' Expires : 528 q : Call-ID : '1016393a-5c1cbaeb(a)200.113.154.25' CSeq : 45 User-Agent: 'Linksys/PAP2-3.1.3(LS)' received : '' State : CS_NEW Flags : 0 next : (nil) prev : (nil) ~~~/Contact~~~~ Then i try to make an invite to the endpoint from the 10.0.0119: U 10.0.0.119:5060 -> 10.0.0.35:5060 INVITE sip:5555847110@sipproxy.mydomain.com SIP/2.0. U 10.0.0.35:5060 -> 10.0.0.119:5060 SIP/2.0 100 trying -- your call is important to us. U 10.0.0.35:5060 -> 200.113.154.25:65236 INVITE sip:5555847110@200.113.154.25:121962196 SIP/2.0. U 10.0.0.35:5060 -> 200.113.154.25:65236 INVITE sip:5555847110@200.113.154.25:121962196 SIP/2.0. U 10.0.0.35:5060 -> 200.113.154.25:65236 INVITE sip:5555847110@200.113.154.25:121962196 SIP/2.0. U 10.0.0.35:5060 -> 200.113.154.25:65236 INVITE sip:5555847110@200.113.154.25:121962196 SIP/2.0. U 10.0.0.35:5060 -> 200.113.154.25:65236 INVITE sip:5555847110@200.113.154.25:121962196 SIP/2.0. U 10.0.0.35:5060 -> 200.113.154.25:65236 INVITE sip:5555847110@200.113.154.25:121962196 SIP/2.0. U 10.0.0.35:5060 -> 200.113.154.25:65236 INVITE sip:5555847110@200.113.154.25:121962196 SIP/2.0. Is this a bug? Or maybe a problem with my configuration. I hope that someone could help me. Thanks. Ricardo Martinez.-