I see that I can run ./freeswitch -nonat to completely disable the use of UPnP.<br><br>But what if I only want FS to stop opening a path to its internal registration port (5060)?  All the devices that I want to register are on my home network, behind the NAT, and I&#39;d prefer not to expose the internal registration port to hackers until I need to.  (And then, only after I have learned more about security measures that I can implement).<br>