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NOTE: The procedure below is only applicable when running pre-4.0.4 modules. Manually configuring MQTT Distributor to consume a Java Keystore is supported and will work properly when running pre-4.0.4 modules, but it is no longer the recommended process for encrypting MQTT communication. If possible, please upgrade to modules version 4.0.4 or higher and follow the default workflow to secure MQTT communication.
Whether you are using a certificate issued by a trusted CA (Certificate Authority) or a self-signed certificate, internally MQTT Distributor accesses these certificate(s) via the Java KeyStore file that it is configured to use. This KeyStore must contain the public certificate, the private key, and possibly an intermediate certificate if applicable.
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