MQTT protocol add EC2

Question

i want to run my broker server built in mosca js EC2 service in ubuntu operating system is running successfully in the server but when i want to access it from my IoT devices i can't connect. The reason is that the EC2 computer does not have access to the MQTT protocol. I can't activate "sudo ufw allow mqtt" command.

Answer

Verify that your EC2 security group allows inbound traffic on the MQTT port (typically 8883). You may need to open this port instead of using the 
`sudo ufw allow mqtt`
 command.

Confirm that your device certificate and private key have been attached properly to your AWS IoT thing and that your client code is using these credentials correctly when connecting.

Consider using MQTT over WebSocket which can bypass port restrictions by tunneling over port 443. The AWS IoT Device SDKs support this out of the box.

MQTT protocol add EC2

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