[OpenSIPS-Users] Amazon EC2 and topology_hiding(U) looping ACK

[Alexander Mustafin]

Hello!

I’ve a problem with looping ACK, when using topology_hiding(«U») on Amazon EC2 server with Elastic IP. All works fine without topology_hiding.

I’ve set advertised_address=«54.54.54.54» (it;s example of my Elastic IP address) option in config and have no other special functions like «rewrite host()» and others in config.

And now, when I receive ACK - it’s looping (some headers are cuted):

U 2014/08/21 10:18:29.040856 62.62.62.62:5060 -> 10.0.0.196:5070
ACK sip:77777777777 at 54.54.54.54:5070;did=d99.910e2214 SIP/2.0.
From: <sip:9999999999 at sip.media.example.com:5060;user=phone>;tag=-45026-48be65b-339c17e3-48be65b.
To: «user user"<sip:7777777 at sip.media.example.com:5060;user=phone>;tag=UjBF6gy1Q0Z7H.
Call-ID: ead1318f74d2960620e85e487372d63a55e4a2 at 62.62.62.62.
CSeq: 1 ACK.
Via: SIP/2.0/UDP 62.62.62.62:5060;branch=z9hG4bK-70ee58-b9230b46-5c11ab8.


U 2014/08/21 10:18:29.041446 10.0.0.196:5070 -> 54.54.54.54:5070
ACK sip:77777777777 at 54.54.54.54:5070;did=d99.910e2214 SIP/2.0.
From: <sip:9999999999 at sip.media.example.com:5060;user=phone>;tag=-45026-48be65b-339c17e3-48be65b.
To: «user user"<sip:7777777 at sip.media.example.com:5060;user=phone>;tag=UjBF6gy1Q0Z7H.
Call-ID: ead1318f74d2960620e85e487372d63a55e4a2 at 62.62.62.62.
CSeq: 1 ACK.
Via: SIP/2.0/UDP 54.54.54.54:5070;branch=z9hG4bK4d9f.070d4732.2.
Via: SIP/2.0/UDP 62.62.62.62:5060;branch=z9hG4bK-70ee58-b9230b46-5c11ab8.

U 2014/08/21 10:18:29.043433 54.54.54.54:5070 -> 10.0.0.196:5070
ACK sip:77777777777 at 54.54.54.54:5070;did=d99.910e2214 SIP/2.0.
From: <sip:9999999999 at sip.media.example.com:5060;user=phone>;tag=-45026-48be65b-339c17e3-48be65b.
To: "ration1 ration1"<sip:7777777 at sip.media.example.com:5060;user=phone>;tag=UjBF6gy1Q0Z7H.
Call-ID: ead1318f74d2960620e85e487372d63a55e4a2 at 62.62.62.62.
CSeq: 1 ACK.
Via: SIP/2.0/UDP 54.54.54.54:5070;branch=z9hG4bK4d9f.070d4732.2.
Via: SIP/2.0/UDP 62.62.62.62:5060;branch=z9hG4bK-70ee58-b9230b46-5c11ab8.



What I should to do to solve this problem?


Best regards,
Alexander Mustafin
mustafin.aleksandr at gmail.com




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