Both FS and the asterisk box I would like to trunk are in the same private network, I have no reason or ability, (IT guy will take weeks to open up a port on the firewall) to connect to a Stun server in my test environment.

1)      Is there a way to disable this?  I tried to disable it by changing internal.xml as shown below but even after reset it seem to have no effect.

2)      Is UDP port 3478 the only port I need to open to get this to work in a real environment?