Unblock Network Ports
Testing your app while connected to a corporate network can prevent your test device from receiving messages, especially if your firewall blocks certain ports. Unblock these TCP ports to ensure that your test device can reach the APNs servers.
| TCP Port | Description |
|---|---|
| 5223 | Used by devices to communicate to the APNs servers |
| 2195 | Used to send notifications to the APNs servers |
| 2196 | Used by the APNs feedback service |
| 443 | Used as a fallback service for Wi-Fi devices when those devices can’t communicate with the APNs service on port 5223 |