title	description	author	ms.author	ms.date	ms.topic	ms.service
Device Update for IoT Hub network requirements \| Microsoft Docs	Device Update for IoT Hub uses a variety of network ports for different purposes.	vimeht	vimeht	1/11/2021	conceptual	iot-hub-device-update

Ports Used With Device Update for IoT Hub

ADU 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)
ADU Agent Connection to Azure IoT Hub	8883 (MQTT Protocol)

The ADU agent can be modified to use any of the supported Azure IoT Hub protocols.

Learn more about the current list of supported protocols.