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Abstract

This page describes how MQTT Security Context allows secure command writes through MQTT Engine and MQTT Transmission configurations interact using the Ignition Security Context to inhibit write commands to tags by unauthorized users. by using custom tag permissions to authorize a tag write based on user.

When using Ignition Security contextContext, the user authorization is encrypted and included with the published write event message from MQTT Engine. At MQTT Transmission, if the user is authorized to write to the tag, this results in a successful write, and the tag change is published. If the user is not authorized to write to the tag, there is no action taken. 

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This page describes the MQTT Engine and MQTT Transmission configurations required to use MQTT Security Context.

MQTT Engine Configuration

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