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Device Update for IoT Hub uses a variety of network ports for different purposes.
Default Ports
| Purpose | Port Number |
|---|---|
| Download from networks/CDNs | 80 (HTTP protocol) |
| Download from MCC/CDNs | 80 (HTTP protocol) |
| Device Update agent connection to IoT Hub | 8883 (MQTT protocol) |
Use IoT Hub supported protocols
The Device Update agent can be modified to use any of the supported Azure IoT Hub protocols.
For more information, see Choose a device communication protocol.