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A safety protection system and method based on a CIP protocol in a PLC

A security protection and protocol technology, applied in transmission systems, electrical components, etc., can solve problems such as CIP protocol network protection, and achieve the effect of ensuring safe operation

Active Publication Date: 2019-06-21
江苏亨通工控安全研究院有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a safety protection system and method based on the CIP protocol in PLC, solve the problem that the background technology cannot effectively protect the network of the CIP protocol used by PLC, solve the problem of safety protection of industrial control systems, and ensure industrial Safe operation of the control system

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  • A safety protection system and method based on a CIP protocol in a PLC
  • A safety protection system and method based on a CIP protocol in a PLC
  • A safety protection system and method based on a CIP protocol in a PLC

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0032] refer to figure 1 As shown, an embodiment of the safety protection system based on the CIP protocol in the PLC of the present invention includes a data collection module 10, an application layer filtering module 20, a DPI filtering analysis module 30, a whitelist matching module 40, and an output module 50;

[0033] 1. Data acquisition module 10

[0034] The data collection module 10 is connected to the network through a network interface, and is used to collect data packets in the Ethernet network, obtain specific data packets, and send the obtained data packets to the application layer filtering module 20 .

[0035] In other embodiments, it is also possible to use networ...

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Abstract

The invention discloses a safety protection system and method based on a CIP protocol in a PLC, and the system comprises a data collection module which is accessed to a network through a network interface, and is used for collecting a data packet in the Ethernet, obtaining a specific data message, and sending the obtained data message to an application layer filtering module; the application layerfiltering module is used for searching and filtering messages conforming to the CIP protocol and sending the messages to the DPI filtering and analyzing module; the DPI filtering and analyzing moduleis used for analyzing a key command CMD and a function code FNC in the CIP protocol and sending the key command CMD and the function code FNC to the white list matching module; the white list matching module is used for carrying out feature matching on the key command CMD and the function code FNC analyzed in the DPI filtering analysis module and the key command CMD and the function code FNC preset in the white list, and judging whether the key command CMD and the function code FNC are allowed or not; and the output module forwards or discards the message according to filtering judgment of the application layer filtering module, the DPI filtering analysis module and the white list matching module.

Description

technical field [0001] The invention relates to the field of safety protection in industrial control systems, in particular to a safety protection system and method based on the CIP protocol in PLC. Background technique [0002] Data acquisition and monitoring (SCADA), distributed control system (DCS), process control system (PCS), programmable logic controller (PLC) and other industrial controls are widely used to control the operation of production equipment in many key areas of our country, such as nuclear Facilities, iron and steel, chemical industry, petroleum and petrochemical, electric power, natural gas, advanced manufacturing, water conservancy hub, environmental protection, railway, urban rail transit, civil aviation, urban water supply, gas supply and heat supply, etc. Once there is a loophole in the information security of the industrial control system, it will cause major hidden dangers to industrial production and operation and national economic security. Indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06
Inventor 郭立龙袁键杨明旭陈夏裕徐乐晨
Owner 江苏亨通工控安全研究院有限公司
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