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OPC security gateway system

A security gateway and security auditing technology, which is applied in the field of network information security, can solve problems such as poor security, and achieve the effect of improving security and preventing attacks and damages

Inactive Publication Date: 2015-07-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiency of poor security in the interconnection between the existing enterprise information network and the industrial control network, the present invention provides an OPC security gateway system

Method used

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Embodiment Construction

[0022] Reference Figure 1-2 . The basic concepts involved in the present invention are as follows:

[0023] 1. OPC communication process.

[0024] Identifying OPC communication behavior is an important function of the OPC security gateway system, which involves the specific communication process of the OPC protocol. The OPC communication process is mainly divided into two stages.

[0025] (1) OPC communication initiation stage. In the initiation phase, the OPC client initiates communication with the OPC server to obtain the basic information and binding information of the server. The specific operation process is as follows:

[0026] ① The OPC client uses a random port (such as 14963) to initiate a TCP connection request to port 135 of the OPC server, and after a three-way handshake, a TCP connection is established;

[0027] ② The OPC client uses the bind request packet to send a binding request to the OPC server; the binding interface is IOXIDResolve, and its interface identifier ...

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Abstract

The invention discloses an OPC security gateway system, and aims at solving the technical problems of poor security in interconnection of the existing enterprise information network and industrial control network. According to the technical scheme, the system comprises an OPC client security authorization module, an OPC data packet validity inspection module, an OPC data packet content inspection module, an abnormal event detection and alarming module, a log recording and security auditing module, a network assets recognizing and managing module, a system management interface module and a remote management tool. According to the system, the information of the enterprise information network enters the industrial control network through the OPC security gateway system, the OPC security gateway system performs security authorization for the communication behavior and inspects the validity and content of a data packet as well as recognizing and filtering malevolence communication behavior and an OPC data packet, so as to prevent invasion of illegal users, preventing from being attacked by abnormal or deformed OPC data packet as well as preventing the industrial network control from being attacked; the security in interconnection of the enterprise information network and the industrial control network can be improved.

Description

Technical field [0001] The invention belongs to the field of network information security, and particularly relates to an OPC security gateway system. Background technique [0002] In the field of industrial control, in order to realize the interoperability between the application software and hardware products of the industrial control system, it is necessary to solve the problems of system integration and data communication at the application level. To this end, an international organization called the OPC Foundation has been established internationally, and has formulated OPC standards. OPC is the abbreviation for Object Linking and Embedding for Process Control. Now, the OPC Foundation has more than 220 members, including all major companies in the world of automation control systems, instrumentation and process control systems, so the OPC standard has become a de facto international standard. [0003] The core of the OPC standard is Microsoft's component object model COM and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L12/66
Inventor 蔡皖东王康魏鹏程吕品
Owner NORTHWESTERN POLYTECHNICAL UNIV
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