21 Feb
2017
21 Feb
'17
6:33 p.m.
I cannot provide a pcap as there's too much private information, but I have prepared a
graphical representation of the flow in both cases and a sanitized text dump of the SIP
dialog in both cases. I hope this sufficiently illustrates the problem.
So there are two things
a) duplicated INVITE (second is missing the Contact: header)
b) the ACK and BYE are not relayed to the correct IP address
As mentioned I can reproduce this with certainty any time. Endpoints that are not behind
NAT don't seem affected.
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