Abstract
Aiming at the information security in industrial communication network and industrial network integration requirements, this paper develops in-depth study on the current industrial ethernet, OPC UA, Modbus TCP and Profinet, against the vulnerability in the industrial control network, adopts the security strategy under the combination of security function in the mainstream industrial ethernet and protocol deep analysis, and designs an ethernet security monitor in multi-protocol industry. This monitor is able to identify different network protocols automatically in single or multiple network protocols, maintain surveillance over network status in real-time according to the security configuration strategy, supervise illegal access from unauthorized devices, abnormal message, network abnormalities, etc., track the equipment critical process data, and realize local and remote alarm function. After testing, this monitor does not affect the original industrial control network and can effectively protect the security of industrial control network.
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