Networked devices, such as your Mac, PC, and Apple TV, communicate with each other using specific communication channels known as TCP and UDP ports. Learn about the ports used by Apple TV.
These network ports are used by Apple TV for communications on your network.
- TCP port 123 is used to communicate with a network time server.
- TCP port 3689 is used to communicate with iTunes while using the iTunes Library Sharing feature.
- UDP port 5353 is used by Apple TV for automatically finding computers with iTunes on your network using Bonjour.
- TCP port 80 is used for communicating with podcast servers.
- TCP port 80 and 443 are used for basic and secure communications with the iTunes Store via the Internet.
- TCP port 53 is used for regular DNS.
These are well-known ports used by Apple products, like iTunes. If you can use all the features of iTunes, these ports are likely already open on your firewall or NAT router. Note: These ports may also used by other services such as YouTube and Flickr.
Reference: http://support.apple.com/kb/HT2463
