3 ms·Apple – Read the Room. When traffic on port 5223 is blocked, stop sending (2023)3 points by transpute 3y agoKiDD 3y agolol oktranspute 3y agohttps://support.apple.com/en-us/102266 https://support.apple.com/en-us/102266 TCP port 443 is used during device activation, and afterwards for fallback if devices can't reach [Apple Push Notification] APNs on port 5223.