MQTT TLS protocol

There is a tutorial about cirrus, it mentions the extra exercise, that replace Non-TLS MQTT port 1883 with TLS MQTT port 8883, as below

At this point you have a fully functional system that can be expanded or modified as required. Below are some additional activities you may want to try on your own.

  • TLS enable the MQTT Distributor module and disable port 1883
    • Note production MQTT Infrastructures should never run on the open Internet without using TLS enabled MQTT connections!

after I tried, and adjust the setting on transmission tcp://, the connection is still off, can someone please advise how to solve it? thanks

DId you figure out this issue?

If you’re having similar issues, you need to change the protocol as well from tcp:// to ssl:// in addition to changing the port from 1883 to 8883