[OpenSIPS-Users] NAT problem

[xiaofeng]

Hi everyone,

I have a public IP(106.x.x.x), a OpenSIPS(192.168.1.x) and two SIP
UAC(192.168.2.x/192.168.3.x),  the OpenSIPS and UACs are all behind NAT but
not the same NAT.

I configure my route to use the public IP, and forward all packets to my
OpenSIPS.

1. The UACs register to 106.x.x.x, and registered sucessfully.
2. UACs can send/receive 'INVITE' and '200 OK' properly.

What's the problem is:
1. UAC cannot sent/receive 'ACK', as the UAC tries to send 'ACK' request to
the other peer directly. When use nathelper, the UAC tries to send 'ACK' to
192.168.1.x, which still has problems.
2. The RTP cannot send properly, try rtpproxy with no luck. (The rtpproxy
and OpenSIPS run ont the same machine.)

The opensips.cfg is some like the nathelper.cfg which is in the
OpenSIPS/examples/ directory.

Any one can help? Thanks in advance


-- 
xiaofeng

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Distribution: Fedora 17 (Beefy Miracle)
Fedora Project <https://fedoraproject.org/>
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*NAT*



                         +-----------------------+                                         +---------------+
                         |       internet        +-----------------------------------------+   public IP   | 
                         +-----------------------+                                         +---------------+
                            /                 \                                                    | directly forward to OpenSIPS
                          /                     \                                          +----------------+
                        /        3G/4G/LTE/WiFi   \                                        |    OpenSIPS    |
                      /                             \                                      +----------------+
                    /                                 \
                  /                                     \
         +-----------+                               +-----------+
         | mobile #1 |              ...              | mobile #N |
         +-----------+                               +-----------+