[OpenSIPS-Users] Protocol conversion - Double record route issue‏

[Bogdan-Andrei Iancu]

Hi Hamid,

I guess both A and B are on the public internet communicating with your 
opensips via the elastic IP, right ? and your opensips is listening only 
on the private IP in EC2 ? do you use advertise ?

Regards,

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

On 23.02.2016 07:33, Hamid Hashmi wrote:
> I am using opensips as an edge proxy on Amazon EC2 (server behind NAT) 
> and it works fine if It only works on UDP or TCP. but if I need to 
> translate from TCP -> UDP, ACK does not reach proxy server due to 
> private IP in record-route.
>
> EdgeProxy -> B#
>
> |INVITE 
> sip:923003000200 at 182.185.200.42:46488;transport=tcp;line=fd2af176e9c88c3 
> SIP/2.0 Record-Route: 
> <sip:52.76.50.195:6080;transport=tcp;r2=on;lr;ftag=ae2b3a03> 
> Record-Route: <sip:192.168.26.180:6080;r2=on;lr;ftag=ae2b3a03> 
> Record-Route: 
> <sip:+923003000200 at 192.168.26.181:8000;lr;ftag=ae2b3a03;did=077.9923f675;nat=yes> 
> *Record-Route: 
> <sip:52.76.50.195:6080;r2=on;lr;ftag=ae2b3a03;EdgeProxy=true> 
> Record-Route: 
> <sip:192.168.26.180:6080;transport=tcp;r2=on;lr;ftag=ae2b3a03;EdgeProxy=true>* 
> Via: SIP/2.0/TCP 52.76.50.195:6080;branch=z9hG4bK4a7b.55d0e535.0 Via: 
> SIP/2.0/UDP 192.168.26.181:8000;branch=z9hG4bK4a7b.0b4f27b4.0 Via: 
> SIP/2.0/UDP 
> 52.76.50.195:6080;rport=6080;received=192.168.26.180;branch=z9hG4bK4a7b.45d0e535.0;i=2 
> Via: SIP/2.0/TCP 
> 103.255.5.24:47590;received=103.255.5.24;branch=z9hG4bK-524287-1---74668ff8d4027b7c;rport=47590 
> Max-Forwards: 67 Contact: 
> <sip:923007777777 at 103.255.5.24:47590;transport=TCP> To: 
> <sip:+923003000200 at 52.76.50.195:6080;transport=TCP> From: 
> "+923007777777"<sip:+923007777777 at 52.76.50.195>;tag=ae2b3a03|
>
> EdgeProxy -> A#
>
> |SIP/2.0 200 OK Via: SIP/2.0/TCP 
> 192.168.10.13:6060;received=182.185.200.42;rport=47103;branch=z9hG4bK801489929 
> Record-Route: 
> <sip:52.76.50.195:6080;transport=tcp;r2=on;lr;ftag=1252633513> 
> Record-Route: <sip:192.168.26.180:6080;r2=on;lr;ftag=1252633513> 
> Record-Route: 
> <sip:+923007777777 at 192.168.26.181:8000;lr;ftag=1252633513;did=755.1859af64;nat=yes> 
> *Record-Route: 
> <sip:52.76.50.195:6080;r2=on;lr;ftag=1252633513;EdgeProxy=true> 
> Record-Route: 
> <sip:192.168.26.180:6080;transport=tcp;r2=on;lr;ftag=1252633513;EdgeProxy=true>* 
> Contact: <sip:923007777777 at 103.255.5.24:48469;transport=TCP> To: 
> <sip:+923007777777 at 52.76.50.195:6080>;tag=12b65b6d From: 
> <sip:923003000200 at 52.76.50.195:6080>;tag=1252633513|
>
> A# -> EdgeProxy
>
> |ACK sip:923007777777 at 103.255.5.24:48469;transport=TCP SIP/2.0 Via: 
> SIP/2.0/TCP 192.168.10.13:6060;rport;branch=z9hG4bK184821964 *Route: 
> <sip:192.168.26.180:6080;transport=tcp;r2=on;lr;ftag=1252633513;EdgeProxy=true> 
> Route: 
> <sip:52.76.50.195:6080;r2=on;lr;ftag=1252633513;EdgeProxy=true>* 
> Route: 
> <sip:+923007777777 at 192.168.26.181:8000;lr;ftag=1252633513;did=755.1859af64;nat=yes> 
> Route: <sip:192.168.26.180:6080;r2=on;lr;ftag=1252633513> Route: 
> <sip:52.76.50.195:6080;transport=tcp;r2=on;lr;ftag=1252633513> From: 
> <sip:923003000200 at 52.76.50.195:6080>;tag=1252633513 To: 
> <sip:+923007777777 at 52.76.50.195:6080>;tag=12b65b6d|
>
> Client send ACK to Private IP of Edge proxy. While it should send it 
> to its Public IP.
>
> opensips inserts routes inversely incase of protocol translation. It 
> should insert Double route with private IP first and public IP 
> afterwards INSTEAD of public IP first for OUTBOUND INVITEs.
>
> */Hamid R. Hashmi/*
> Software Engineer - VoIP
> Vopium A/S
>
>
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