Merge pull request #103206 from JimacoMS3/mqtt-update-for-blocked-port

Add info to use MQTT-WS if MQTT port is blocked. GH issue 45893 and 3…

Author: ShannonLeavitt

articles/iot-hub/iot-hub-csharp-csharp-c2d.md

@@ -45,6 +45,8 @@ At the end of this tutorial, you run two .NET console apps.
 
 * An active Azure account. If you don't have an account, you can create a [free account](https://azure.microsoft.com/pricing/free-trial/) in just a couple of minutes.
 
+* Make sure that port 8883 is open in your firewall. The device sample in this article uses MQTT protocol, which communicates over port 8883. This port may be blocked in some corporate and educational network environments. For more information and ways to work around this issue, see [Connecting to IoT Hub (MQTT)](iot-hub-mqtt-support.md#connecting-to-iot-hub).
+
 ## Receive messages in the device app
 
 In this section, modify the device app you created in [Send telemetry from a device to an IoT hub](quickstart-send-telemetry-dotnet.md) to receive cloud-to-device messages from the IoT hub.

articles/iot-hub/iot-hub-csharp-csharp-device-management-get-started.md

@@ -35,6 +35,8 @@ At the end of this tutorial, you have two .NET console apps:
 
 * An active Azure account. If you don't have an account, you can create a [free account](https://azure.microsoft.com/pricing/free-trial/) in just a couple of minutes.
 
+* Make sure that port 8883 is open in your firewall. The device sample in this article uses MQTT protocol, which communicates over port 8883. This port may be blocked in some corporate and educational network environments. For more information and ways to work around this issue, see [Connecting to IoT Hub (MQTT)](iot-hub-mqtt-support.md#connecting-to-iot-hub).
+
 ## Create an IoT hub
 
 [!INCLUDE [iot-hub-include-create-hub](../../includes/iot-hub-include-create-hub.md)]

articles/iot-hub/iot-hub-csharp-csharp-file-upload.md

@@ -48,6 +48,8 @@ At the end of this tutorial you run two .NET console apps:
 
 * An active Azure account. If you don't have an account, you can create a [free account](https://azure.microsoft.com/pricing/free-trial/) in just a couple of minutes.
 
+* Make sure that port 8883 is open in your firewall. The device sample in this article uses MQTT protocol, which communicates over port 8883. This port may be blocked in some corporate and educational network environments. For more information and ways to work around this issue, see [Connecting to IoT Hub (MQTT)](iot-hub-mqtt-support.md#connecting-to-iot-hub).
+
 [!INCLUDE [iot-hub-associate-storage](../../includes/iot-hub-associate-storage.md)]
 
 ## Upload a file from a device app

articles/iot-hub/iot-hub-csharp-csharp-schedule-jobs.md

@@ -50,6 +50,8 @@ At the end of this tutorial, you have two .NET (C#) console apps:
 
 * An active Azure account. If you don't have an account, you can create a [free account](https://azure.microsoft.com/pricing/free-trial/) in just a couple of minutes.
 
+* Make sure that port 8883 is open in your firewall. The device sample in this article uses MQTT protocol, which communicates over port 8883. This port may be blocked in some corporate and educational network environments. For more information and ways to work around this issue, see [Connecting to IoT Hub (MQTT)](iot-hub-mqtt-support.md#connecting-to-iot-hub).
+
 ## Create an IoT hub
 
 [!INCLUDE [iot-hub-include-create-hub](../../includes/iot-hub-include-create-hub.md)]

articles/iot-hub/iot-hub-csharp-csharp-twin-getstarted.md

@@ -33,6 +33,8 @@ In this tutorial, you create these .NET console apps:
 
 * An active Azure account. If you don't have an account, you can create a [free account](https://azure.microsoft.com/pricing/free-trial/) in just a couple of minutes.
 
+* Make sure that port 8883 is open in your firewall. The device sample in this article uses MQTT protocol, which communicates over port 8883. This port may be blocked in some corporate and educational network environments. For more information and ways to work around this issue, see [Connecting to IoT Hub (MQTT)](iot-hub-mqtt-support.md#connecting-to-iot-hub).
+
 ## Create an IoT hub
 
 [!INCLUDE [iot-hub-include-create-hub](../../includes/iot-hub-include-create-hub.md)]

articles/iot-hub/iot-hub-ios-swift-c2d.md

@@ -46,6 +46,8 @@ At the end of this article, you run two Swift iOS projects:
 
 * The latest version of [CocoaPods](https://guides.cocoapods.org/using/getting-started.html).
 
+* Make sure that port 8883 is open in your firewall. The device sample in this article uses MQTT protocol, which communicates over port 8883. This port may be blocked in some corporate and educational network environments. For more information and ways to work around this issue, see [Connecting to IoT Hub (MQTT)](iot-hub-mqtt-support.md#connecting-to-iot-hub).
+
 ## Simulate an IoT device
 
 In this section, you simulate an iOS device running a Swift application to receive cloud-to-device messages from the IoT hub. 

articles/iot-hub/iot-hub-java-java-c2d.md

@@ -48,6 +48,8 @@ At the end of this tutorial, you run two Java console apps:
 
 * An active Azure account. If you don't have an account, you can create a [free account](https://azure.microsoft.com/pricing/free-trial/) in just a couple of minutes.
 
+* Make sure that port 8883 is open in your firewall. The device sample in this article uses MQTT protocol, which communicates over port 8883. This port may be blocked in some corporate and educational network environments. For more information and ways to work around this issue, see [Connecting to IoT Hub (MQTT)](iot-hub-mqtt-support.md#connecting-to-iot-hub).
+
 ## Receive messages in the simulated device app
 
 In this section, you modify the simulated device app you created in [Send telemetry from a device to an IoT hub](quickstart-send-telemetry-java.md) to receive cloud-to-device messages from the IoT hub.

articles/iot-hub/iot-hub-java-java-device-management-getstarted.md

@@ -54,6 +54,8 @@ At the end of this tutorial, you have two Java console apps:
 
 * An active Azure account. (If you don't have an account, you can create a [free account](https://azure.microsoft.com/pricing/free-trial/) in just a couple of minutes.)
 
+* Make sure that port 8883 is open in your firewall. The device sample in this article uses MQTT protocol, which communicates over port 8883. This port may be blocked in some corporate and educational network environments. For more information and ways to work around this issue, see [Connecting to IoT Hub (MQTT)](iot-hub-mqtt-support.md#connecting-to-iot-hub).
+
 ## Create an IoT hub
 
 [!INCLUDE [iot-hub-include-create-hub](../../includes/iot-hub-include-create-hub.md)]

articles/iot-hub/iot-hub-java-java-file-upload.md

@@ -47,6 +47,8 @@ At the end of this tutorial you run two Java console apps:
 
 * An active Azure account. (If you don't have an account, you can create a [free account](https://azure.microsoft.com/pricing/free-trial/) in just a couple of minutes.)
 
+* Make sure that port 8883 is open in your firewall. The device sample in this article uses MQTT protocol, which communicates over port 8883. This port may be blocked in some corporate and educational network environments. For more information and ways to work around this issue, see [Connecting to IoT Hub (MQTT)](iot-hub-mqtt-support.md#connecting-to-iot-hub).
+
 [!INCLUDE [iot-hub-associate-storage](../../includes/iot-hub-associate-storage.md)]
 
 ## Upload a file from a device app

articles/iot-hub/iot-hub-java-java-schedule-jobs.md

@@ -54,6 +54,8 @@ At the end of this tutorial, you have a java console device app and a java conso
 
 * An active Azure account. (If you don't have an account, you can create a [free account](https://azure.microsoft.com/pricing/free-trial/) in just a couple of minutes.)
 
+* Make sure that port 8883 is open in your firewall. The device sample in this article uses MQTT protocol, which communicates over port 8883. This port may be blocked in some corporate and educational network environments. For more information and ways to work around this issue, see [Connecting to IoT Hub (MQTT)](iot-hub-mqtt-support.md#connecting-to-iot-hub).
+
 ## Create an IoT hub
 
 [!INCLUDE [iot-hub-include-create-hub](../../includes/iot-hub-include-create-hub.md)]