Hi
I need some "guidelines" to troubleshoot the following issue:
a) A is behind NAT
b) B is not behind NAT
c) A calls B, SIP INVITE is sent over TCP
d) A's firewall does NAT and changes the source port to let's say p1
e) B releases the call and sends BYE over UDP
f) Kamailio sends the BYE to A, over UDP, to the NATed source port p1 ?!
2 comments: - This scenario works perfectly when A is the one who disconnects the call. and of course when no NAT is involved everything works ok - if works when I comment the line "fix_nated_contact()" in the route[NAT] block:
route[NAT]{ #!ifdef WITH_NAT force_rport(); #if (nat_uac_test("19")) { if (nat_uac_test("3")) { if (method=="REGISTER") { setbflag(10); fix_nated_register(); } else { #fix_nated_contact(); [...]
Any hint is very welcome.
Cheers Pascal