[OpenSIPS-Users] Trouble with nat handling.

[Гогичашвили Андрей]

Thank you!

 

From: Bogdan-Andrei Iancu [mailto:bogdan at opensips.org] 
Sent: Friday, April 05, 2013 5:43 PM
To: users at lists.opensips.org; a.gogichashvili at ptl.ru
Subject: Re: [OpenSIPS-Users] Trouble with nat handling.

 

Hello,

Not clear from the diagram, but the UAC2 is behind the NAT, not OpenSIPS and
UAC1, right ?

As Laszlo suggested, you need a force_rport(), but not only for INVITE, but
for all requests coming from behind the NAT - like the BYE, in your case.

Regards,



Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com


On 04/04/2013 05:29 PM, Гогичашвили Андрей wrote: 

Hello! I have some trouble with nat handling.

I have such scheme:

uac1---opensips---(NAT)---uac2

I call to UAC2 and signaling establishment is ok. When  UAC2 sends BYE
opensips translates 200OK (received from UAC1) to the wrong port. 

 

BYE generated by UAC2 has such via header:

"Via: SIP/2.0/UDP 192.168.18.137:5060;branch=z9hG4bK8b517b11a415"

and the BYE comes from U 2013/04/04 17:21:50.287792 1.1.1.1:59292 ->
2.2.2.2:5068

Where 1.1.1.1 - nat, 2.2.2.2 - opensips

 

Opensips adds one more via header to the BYE:

Via: SIP/2.0/UDP 2.2.2.2;branch=z9hG4bK7f45.debc1592.0. 

and changes first via header by adding received field:

Via: SIP/2.0/UDP
192.168.18.137:5060;received=1.1.1.1;branch=z9hG4bK8b517b11a415

 

200 OK got from UAC1 opensips tries to send not to 1.1.1.1:59292 but to
1.1.1.1:5060

The question is how can we make opensips to send 200 OK to 59292 port?

 

Thank you for any help.

 

 

 
 
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