[Users] Problems registering NAT clients

Paco Orozco pakusland at gmail.com
Sat Feb 4 17:58:36 CET 2006


Hello,

The last message was mailformed.... sorry

 First of all, I'm spanish and my english isn't good, so please excuse
my mistakes.
 I've been working with openser for a year. Now I'm modifying my SIP
service in order to allow clients in NAT scenarios.
 I've read about symmetric / full cone / ... and other NAT scenarios.
I've read about mediaproxy / rtpproxy and nathelper modules.
 I've got a openser.cfg working properly without NAT clients. And I've
modified it (see attach).

 Client X-Lite:
 IP: 192.168.1.2 (public address 81.39.220.5)
 Listen SIP port: 5060
 Listen RTP port: 8000

 Server: Openser 1.0 with Media Proxy
 IP: 147.83.197.39
 Config in opernser.cfg

 If i try to register with a UAC (X-Lite or K-Phone) with symmetric
NAT scenario. Opernser server doesn't answer the client to 5060 port,
as i need.
 X-Lite Diagnostic LOG is client_messages.txt
 Client timed out without receiving any server messages.

 This is a tcpdump on clients side:
 17:42:23.458980 IP 192.168.1.2.5060 > 147.83.197.39.5060: SIP, length: 448
 17:42:23.558019 IP 147.83.197.39.5060 > 192.168.1.2.10145: SIP, length: 538
 17:42:23.558077 IP 192.168.1.2 > 147.83.197.39: ICMP 192.168.1.2 udp
port 10145 unreachable, length 556
 17:42:25.085485 IP 192.168.1.2.5060 > 147.83.197.39.5060: SIP, length: 448
 17:42:28.108960 IP 192.168.1.2.5060 > 147.83.197.39.5060: SIP, length: 448
 17:42:32.643903 IP 192.168.1.2.5060 > 147.83.197.39.5060: SIP, length: 2
 17:42:34.156151 IP 192.168.1.2.5060 > 147.83.197.39.5060: SIP, length: 448

 On the server this is the tcpdump:
 17:42:23.904035 IP 81.39.220.5.10145 > 147.83.197.39.5060: SIP, length: 448
 17:42:23.904261 IP 147.83.197.39.5060 > 81.39.220.5.10145: SIP, length: 538
 17:42:23.905028 IP 147.83.197.39.5060 > 81.39.220.5.10145: SIP, length: 680
 17:42:24.004623 IP 81.39.220.5 > 147.83.197.39: ICMP 81.39.220.5 udp
port 10145 unreachable, length 556
 17:42:25.525470 IP 81.39.220.5.10145 > 147.83.197.39.5060: SIP, length: 448
 17:42:25.525607 IP 147.83.197.39.5060 > 81.39.220.5.10145: SIP, length: 538
 17:42:25.526314 IP 147.83.197.39.5060 > 81.39.220.5.10145: SIP, length: 680
 17:42:28.549322 IP 81.39.220.5.10145 > 147.83.197.39.5060: SIP, length: 448

 What's wrong?

 It's necessary to use a STUN server?
 Why can't register?
 Why openser doesn't reply to 5060 port? My client it's only reachable in this.
 Can anyone help me?
 Anyone have a OpenSer config working?

 Thanks in advance

--
-------------------------------------
Aquel que planta árboles bajo los
que sabe muy bien que nunca se
sentara, ha descubierto el auténtico
significado de la vida.
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