I'm using the ZDF app on my Android TV Mibox 3S and I noticed that in the last couple of days it pauses quite often for buffering and occasionally stops completely. YouTube seems to play just fine but in my setup it goes via he.net IPV6 tunnel so I'm not sure I can compare. Somehow I don't think ZDF is already on IPV6, at least I couldn't find any information on this aspect.
How do I go about finding out what protocol / port / host it is being used?
I thought about iftop but I find it hard to read. The way Android TV works, it should have one connection or two with significant activity and the rest open but dormant.