Note: When configuring the Apple Push Notification Service, change the push gateway, push gateway port, feedback gateway, and feedback gateway port values only when configuring notifications in a development environment. To enable Apple push notifications, the firewall must allow outbound connections to Apple push notification servers on default ports 2195 and 2196. The default URL is for production and should be changed to gateway.sandbox.push.apple.com. After making these changes, you must restart your machine.