Hi everybody, Is there a reason why fix_nated_contact() only works for UDP? My problem is that in the case of TCP and tcp-aliases only the port is taken from the via-header. The IP-addr is taken from the source of the packet. This leads to the fact that in case of NAT and TCP no alias-mapping is found.... If I comment the lines in nathelper.c which exclude the use of TCP all works fine - so what is the reason for fix_nated_contact() to be only processed with UDP? Any reasons for this? regards, Philipp