I am having trouble accessing / configuration APPLE PUSH Servers to work with our internal server behidn Proxy and Firewall
iOS 6
Posted on Jun 19, 2013 6:30 PM
Q: How to Configure MS Forefront TMG2010 for Apple PUSH Notification Server
Among other details, outbound connections to TCP 5223 in 17.0.0.0/8 must be open.
Here's the full list of ports used for push notifications.