On Monday 10 August 2015 14:43:06 Jean-Marie Baran wrote:

We see clearly that the port is wrong here. But in the received SIP 
frame, everything suggests that the correct port is 5060, and I do not 
think Kamailio will look at the transport frame to send the response 
back to the correct port. Am I correct stating this ?

Are you using force_rport()? That should send a reply to the source ip/port of 
the socket.

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