Recommended not calling Hughes, and just picking a port that is used commonly for something else that streams data both ways.
I've concealed some light web server traffic before, in the earlier days of broadband when they only wanted to allow me one computer to be online (hahaha), blocked common ports, and the infrequent web traffic would saturate the pipe and technically require me to have a business line since I was running a "server", be it infrequently for personal use, and legal purposes, like serving up a website and testing stuff. I used the ports for things like netmeeting iirc, which compares to skype these days, to bypass the blockade and upstream some.
[Edit] I see fenderman has you covered!