ubuntu 18.04 , kamailio v5.3.8 :
UE A and B register sucess on kamailio server over tcp. When UE A calls UE B, kamailio server receive the INVITE over tcp from UE A, then it send invite to UE B. But the invite sent by kamailio to UE B is over UDP. Then UE B returns ICMP Destination unreachable(Port unreachable).
Is the error configuration related or a bug?
Any kind of help is highly appreciated.
Best Regards,