I posted something semi unrelated a few weeks ago about the same problem on the same ATV at a different location. I am completely unable to connect to my server remotely from any of these tvs, manually or using connect, via 80 or 443. I get an immediate "connection failed" message after hitting OK. I am able to connect to the server using every other non-TV device on the same network w/o issue. Since I have until tomorrow morning to get this figured out or try again in a couple months, I'm h