Interesting as most home ISPs block Port 80 to prevent people from hosting their own Web Sites / Servers. This might also apply for 443, can you try other / custom ports and see if that helps?
Denon AVR-X7200 - Klipsch RF-82 II Fronts, RC-62 II Center, RS-52 II Surrounds & R-112SW & Four CDT-5800-C II Ceilings for an Atmos 5.1.4 Setup.
Last edited by funhouse69; 12-20-2015 at 10:53 PM.
Reason: Fixed Typo