Apple FaceTime Tech Geekiness Ahead: TCP, UDP, and SIP Revealed
Put on your propeller hats folks, there’s a pair of extra tech-geekie links ahead. The first is from Apple itself. Support document HT4245 helps you get FaceTime video calls working if your WiFi network is behind corporate firewalls that are secured a bit tighter than the usual home networks. You’ll need to work with the network administrator to open up TCP ports 53, 80, 443, 4080, 5223 as well as a range of UDP ports 16393-16472.
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