Originally Posted by Banjo
Anybody know what port it is talking on? Maybe it is using an odd port number and that is being blocked by the router.
It's using HTTP(S) requests on standard ports (80, 443). You can always run WireShark on one of your PCs and monitor the traffic, but I wouldn't bother, just try a public WiFi and you'll probably be fine. If that fails, then you have a faulty unit.