How to enable the port 1883 in ActiveMQ?

Please follow on below:

1. Locate the activemq.xml Configuration File:

This file is typically found in the conf directory of your ActiveMQ installation.

2. Edit the MQTT Transport Connector:

• Open the activemq.xml file in a text editor.

• Look for the <transportConnector> tag that defines the MQTT protocol:

<transportConnector name="mqtt" uri="mqtt://0.0.0.0:8883?maximumConnections=1000&wireFormat.maxFrameSize=104857600"/>

• Change the port from 8883 to 1883:

<transportConnector name="mqtt" uri="mqtt://0.0.0.0:1883?maximumConnections=1000&wireFormat.maxFrameSize=104857600"/>

Save and Restart ActiveMQ:

Save the changes to the activemq.xml file.

Restart the ActiveMQ service to apply the new configuration.

Verify the Change:

Use a tool like netstat or an MQTT client to confirm that ActiveMQ is now listening on port 1883.