Hi, I want to send packet to a different port e.g. 7050 and receive its response on a different port e.g. 11111. I am setting created the transport and set the via header to 11111 however, on reception pjsip automatically changes via header to the port of the Tx transport i.e. 7050. How can I make sure that the VIA header contains different port than the port of Tx transport? Best Regards, Muhammad Usman Shahid, Engineer National University of Sciences and Technology, School of Electrical Engineering and Computer Sciences.