![]() ![]() If you can't open port 8883 in your firewall, we recommend using MQTT over Web Sockets. The MQTT port (8883) is blocked in many corporate and educational networking environments. Connecting to IoT HubĪ device can use the MQTT protocol to connect to an IoT hub using any of the following options. ![]() Therefore, IoT Hub doesn't support non-secure connections over port 1883. For more information about the basic and standard IoT Hub tiers, see How to choose the right IoT Hub tier.Īll device communication with IoT Hub must be secured using TLS/SSL. Some of the features mentioned in this article, like cloud-to-device messaging, device twins, and device management, are only available in the standard tier of IoT Hub.
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