US Patent 11271952 Network probe and method of processing message

The invention relates to a method of processing messages in a Factory Automation, FA, architecture comprising a FA network comprising at least one device, and an external network, said method being implemented by a network probe and comprising: intercepting (201) a message issued from the external network and intended for a device among the at least one device of the FA network; classifying (202) the message among a predefined set of categories based at least on the device for which the message is intended; deciding (203) to issue an alert based at least on the category in which the message is classified.