I want to connect my AppleTV 4's Channels app to my home Channels DVR running on a mac-mini. When I tried to connect to the remote DVR, it demanded that I connect to the 57000 port on the "same network" to authorize access. I had to bring that AppleTV from its remote location to my home and perform the connection and authorization and it worked. I can also connect remotely from my iPhone. The problem with the AppleTV is that when I return it to the remote location, it demands the authorization process be repeated. Note that when I access it in the remote location, the AppleTV is tethered to my iPhone, that same iPhone can access the DVR via the Channels app.
I'm not seeing what I am doing wrong to get the AppleTV to connect to my home Channels DVR - any suggestions?