[OpenSER-Users] Formation of ACKs?

[Tobias Lindgren]

Hello all,

I'm having problems with ACKs not beeing matched to an ongoing call, thus OpenSER resends a 487 many times.

My question is, would OpenSER deny an ACK depending on how the headers are sorted in the packet? Eg. if the VIA-header is found at the end of the packet? How does it actually match the 487 and the ACK?

Packet from proxy that OpenSER doesn't seem to match:
User-Agent: hotsip-transactron
Max-Forwards: 70
Content-Length: 0
To: <sip:123456 at domain2.se>;tag=1499854882
From: "PBX" <sip:654321 at domain1.se>;tag=as2fa86da4
Call-ID: 22079ed445536bea109aefc410164bb5 at domain1.se
CSeq: 103 ACK
Via: SIP/2.0/UDP 192.168.0.1:5060;branch=z9hG4bK-81056ef2a1e003b87474dfaa6a5e7959;rport=5060

Br,
/Tobias
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