[Users] Problems registering NAT clients - sr-users

4 Feb 2006

Hello,

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
--
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que sabe muy bien que nunca se
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significado de la vida.