My soft phone (built with pjsip) is behind NAT, and FreeSWITCH server with a public IP.
The initial Via value in header as below:
-------------------
Message Header
Via: SIP/2.0/TCP 192.168.15.243:47975;rport;branch=z9hG4bKPj5562af0e-0b93-48ba-9dc9-f0f8c59d3953;alias
Transport: TCP
Sent-by Address: 192.168.15.243
Sent-by port: 47975
-------------------
However Via in CANCEL changed:
-------------------
Via: SIP/2.0/TCP 10.x.x.x:47975;rport;branch=z9hG4bKPj41f72fa2-3aca-4f90-8cd0-480df02d4a55;alias
Transport: TCP
Sent-by Address: 10.x.x.x
Sent-by port: 47975
RPort: rport
-------------------
10.x.x.x is the public ip of NAT.
How can I fix this issue?
Thanks a lot!
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