The Apple Push Notification Service (APNs) is used to allow MaaS360 for Mobile Devices to securely communicate with your iOS devices over the air (OTA).  Many other iOS applications also use this functionality as well.

MaaS360 for Mobile Devices uses your APNs certificate to send notifications to your devices when the administrator requests information, or during a defined monitoring schedule.  No data is sent through the APNs service, only the notification.

Some networks block outbound access from their internal wireless (corporate/guest) networks which will prevent APNs from working properly.  This can result in profiles not being pushed to the device after registration as well as notifications not being sent for actions like Wipe.

To ensure this process works properly, the following port must be opened:

TCP 5223 Outbound

Apple has more details about APNs here: http://support.apple.com/kb/HT3576

Additional information about the network blocks for further restriction and troubleshooting can also be found here: http://developer.apple.com/lib.....index.html