Hello, I've found the following issue: When my gateway (it has a public IP address) sends an Invite to SER over a TCP connection, the function client_nat_test(2) always returns true, even though the VIA HF ahs the gateway public IP address. Any idea of why it is doing so? Does it have to do with port comparisson? I tried to fix it using sip_asymmetrics file, but it didn't work. Any help on this file syntax? Thank you very much in advance Hernán