Hi, thank you for your reply, I have tried it at kamailio 5.5 and 5.6 versions, and there are two network interfaces. Actually, I have created a testing vm for this, with a simple almost default kamailio configuration. And yes, with forcing socket everything is working fine, but I just want to know maybe there is a kamailio params that allow "mhomed" params to work with tcp/tls destinations, or is it impossible by TCP design, or is it a kamailio bug. I wonder if anyone uses kamailio with 2+ network interfaces and uses tls and don't use $fs? -- Aidar