Hello!

Two bugs were detected during calls to sbc by user behind NAT
Bug 1:
UserA is behind NAT and has local IP 192.168.1.101. Sems and userB have 
external IPs 
UserA call userB and he answered. After conversation userB made hangup and sbc 
recieved BYE from him (leg B). This BYE was routed to the leg A but destination 
IP was chosen incorrect. BYE was sent to local IP instead external IP of userA

Bug 2:
The same situation which was described above. 
BYE was sent to the incorrect IP and there is no any answer on it. As a result 
sbc makes retransmits of BYE messages. The problem is that sbc did not answer 
200OK to BYE on the leg B as a result userB makes retransmits of BYE messages

Trace attached. 


Regards, Artem

Attachment: trace_nat_bye.pcap
Description: Binary data

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