Apple TV protocol/ports used for updates
We have a few Apple TVs that fail updating. It's with our backend network because when I change to a different wireless network, it updates fine. What I'm trying to find is what protocols and ports are used for the update process so I can have our network folks check these to ensure they aren't blocked. And, if they have to open something up to a specific site, what should they be pointing to (Apple Resource for the update - IP, URL etc).
I have found Apples support info as what ports etc are used on the network but this is for using the device only, not updating the device.
Thanks,
Mike
AppleTV 2, iOS 6.1.4