Hi Daniel,

This issue might be related to #679 and #752.

On a "A endpoint" --- Kamailio ---- "B endpoint" scenario with track_cseq_updates enabled, I am having this issue:

• A sends INVITE with CSeq 101, Kamailio forwards it and gets 407 from B.

• Kamailio makes the SIP Auth with CSeq 102 using uac_auth.

• A sends a within-dialog transaction with Cseq 102.

• Kamailio does not mangle the Cseq (although it adds P-K-CSeq-Refresh: 103 header).

• B sends 200 OK with Cseq 102.

• Kamailio mangles it and forwards it to A with Cseq 101 (that doesn't match the expected CSeq).

I have tested both in master branch (commit d150d5a) and 4.4 branch (commit 5a21952).

I send you a pcap to your gmail account so that you can see what I mean :)

Thank you and tell me please if you need more testing!

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