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MQTT Modules can be enabled to use SSL/TLS to encrypt the communication between MQTT clients which is useful if used on a public network.
Ignition supports certificates from both your organization's internal CA, as well as commercial CA's (Verisign, GoDaddy, Comodo, etc). Self-signed certificates can be generated by Ignition and they are useful for testing environment and non-public networks.
As of module release version 4.0.4, the Cirrus Link modules are capable of reusing the existing Ignition web server provided SSL certificates to secure your MQTT communication. This is the recommended process to secure your MQTT communication using SSL/TLS.
Follow the links below to configure Ignition SSL and the MQTT modules: