I have an AppleTV in a local network that is connected by WiFi but it cannot find the iTunes library in my Mac that is connected via LAN to the router.
If I connect my Mac via WiFi, voilá, AppleTV is connected to my Mac without any problem.
If I connect both the AppleTV and my Mac via LAN, then they can connect without problem also.
The same issue occurs with an iPhone and the Remote.app.
I've opened ports, I followed all the advices from Apple support help and I test the connection via telnet but nothing has been useful for me.
I think the problem is related to Bonjour but I need an experienced opinion that can help me.
Why can't my devices on WiFi see my devices connected via ethernet?