¹Shenyang Institute of Automation Chinese Academy of Science, Shenyang and 110016, China.
²Shenyang Jianzhu University, Shenyang and 110168, China.

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Abstract—For the fragile security status and the growing threat of attack on industrial control systems, it is particularly important to strengthen the technology of security protection. After a detailed study of the characteristics of industrial control systems, this paper put forward design scheme of industrial firewall based on Modbus/TCP protocol, combining "white list" security policies with deep packet inspection technology, and realizing on the Linux platform. The experimental results show that the firewall can effectively intercept illegal data stream and ensure the normal operation of the industrial control system.

Index Terms—Industrial control systems, cyber security, industrial firewall, Modbus/TCP protocol.

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Cite: Wenli Shang, Quansheng Qiao, Ming Wan, Peng Zeng, "Design and Implementation of Industrial Firewall for Modbus/TCP," Journal of Computers vol. 11, no. 5, pp. 432-438, 2016.