Originally Posted by
marble
Have you tried this? Is it simply a case of sending the VOIP or a VPN over port 80? I'd kinda assumed that the internet connection would be heavily firewalled.
There are many types of firewalls and no, I haven't tried this recently on US airlines. But I have done it on many other firewalls. Yes you can always run a VPN, but that may or may not be good enough depending on how high the FW goes. There are other methods.
The point is that data is data. They are obviously letting some data through to the clients, so you just masquerade your VoIP data to look like innocent non-voice traffic.