Cyber security appliance for an operational technology network

A cyber security appliance has one or more modules to interact with entities in an operational technology network and potentially in an informational technology network. The operational technology module can reference various machine-learning models trained on a normal pattern of life of users, devices, and/or controllers of the operational technology network. A comparator module cooperates with the operational technology module to compare the received data on the operational technology network to the normal pattern of life of any of the users, devices, and controllers to detect anomalies in the normal pattern of life for these entities in order to detect a cyber threat. An autonomous response module can be programmed to respond to counter the detected cyber threat.