In the APNSProvider Traces following error can be found:
20090930T160731.520|1| - Feedback Error: A connection attempt failed because the connected party did not properly respond after a period of time,or established connection failed because connected host has failed to respond 18.104.22.168:2196
The Apple Push Notification Service (APNS) requires TCP Port 2195
for the Data Channel, TCP Port 2196 for the Feedback Channel and TCP Port 5223 must be open on any firewalls between the device and the Internet for Wi-Fi Only devices in order to work.
In this case TCP Port 2196 was not opened for outbound traffic.
Open TCP Port 2196 for outbound network traffic from the CA MDM Server (CA MDM Server Farm Master if running an CA MDM Farm) directly to the Internet.
From Apple Developer article:
IP Address Range Used by the Push Service Push providers and iOS devices are often behind firewalls.
To send notifications, you will need to have TCP port 2195 open.
To reach the feedback service, you will need to have TCP port 2196 open.
Devices connecting to the push service over Wi-Fi will must have
TCP port 5223 opened on any firewalls between the device and the Internet open.
The IP address range for the push service is subject to change; the expectation is that providers will connect by hostname rather than IP address. The push service uses a load balancing scheme that yields a different IP address for the same hostname.
However, the entire 22.214.171.124/8 address block is assigned to Apple, so you can specify that range in your firewall rules.