Logger and Analyser for Modbus-based Industrial Networks

Modbus is a communication protocol for distributed control systems. It is widely used in industries such as petrochemical, electricity distribution, and water treatment. The protocol lacks built-in security features, making it an attractive target for attackers. Securing Modbus-based networks requires tools for packet logging, analysis, and realtime monitoring. A novel solution is described, which is fully compatible with the standard Modbus variants (TCP, RTU) and supports most deployment scenarios. It supports packet logging for off-line analysis, as well as real-time analysis for intrusion detection and abnormal operation detection.