To ensure proper functioning of the iOS MDM service and timely responses from mobile devices to the administrator's commands, you need to specify an Apple Push Notification Service certificate (APNs certificate) in the iOS MDM Server settings.
When interacting with Apple Push Notification service (APNs), the iOS MDM service connects to the external address api.push.apple.com through port 2197 (outbound). Therefore, the iOS MDM service requires access to port TCP 2197 for the range of addresses 17.0.0.0/8. From the iOS device, this interaction requires access to port TCP 5223 for the range of addresses 17.0.0.0/8.
If you intend to access APNs from the iOS MDM service through a proxy server, you must enable the use of a proxy server for connecting to APNs.
To enable the use of a proxy server to connect to APNs:
Proxy server is now used to connect to APNs.
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