Matt,
There is no problem to change the port on the RemoteRig. Over here,
many routers have port 5060 already blocked for internal VoIP (even
if you don't use it), so you MUST change it to something else. I have
to admit that I am not aware of any DSL/cable providers blocking ports
like I hear from the U.S. The exception is UMTS (3G), where the providers
do not want you using VoIP.
73,
Mitch DJ0QN / K7DX