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Access control management method, device and system for modbus equipment

An access control and management method technology, applied in the field of access control and management of Modbus devices, can solve problems such as security risks, denial of service by bus devices, and inability to effectively perform remote control, and achieve the effect of improving security and refining the granularity of authority management.

Active Publication Date: 2022-04-19
广州得一信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the prior art still has the following defects: intruders break through the firewall and enter the intranet to control the intranet devices without any restrictions, especially when multiple Modbus devices are serially connected to the same bus, it is easy to be broadcast by illegal users. , to achieve Dos attack, resulting in the denial of service of the devices on the bus, unable to effectively carry out remote control, causing great security risks

Method used

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  • Access control management method, device and system for modbus equipment
  • Access control management method, device and system for modbus equipment
  • Access control management method, device and system for modbus equipment

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specific Embodiment 1

[0027] The embodiment of the present invention firstly describes an access control management method of Modbus equipment. figure 1 A flowchart of an embodiment of an access control management method of a Modbus device according to the present invention is shown. like figure 1 As shown, the method includes the following steps:

[0028] S1: Receive and parse the first access request input by the user to obtain access information.

[0029] In practical applications, external illegal access is often isolated by setting a firewall externally. However, for visitors inside the LAN inside the firewall, access control and management of Modbus devices cannot be performed, and there is a risk of unauthorized access by internal users. In this regard, the embodiment of the present invention proposes a method for isolating visitors and Modbus devices. When a user (visitor) expects to access one or some Modbus devices and operate them, the user's first An access request is analyzed, and ...

specific Embodiment 2

[0040] Furthermore, the embodiment of the present invention also describes an access control management method for Modbus equipment. figure 2 It is a flow chart showing another embodiment of a Modbus device access control management method according to the present invention. like figure 2 As shown, the method includes the following steps:

[0041] A1: From the preset user database, obtain the identity information of all users stored in the user database, and from the preset device database, obtain all Modbus devices stored in the device database.

[0042] In order to quickly and conveniently query and determine later, the embodiment of the present invention needs to set up a device access authority database for reference and determination of authority in subsequent steps.

[0043] For this, it is first necessary to obtain the identity information of all users in the current local area network and the device information of all Modbus devices, so as to determine all the Modb...

specific Embodiment 3

[0066]In addition to the above method, the embodiment of the present invention also describes an access control management device for Modbus equipment. image 3 A structural diagram of another embodiment of an access control management device for Modbus equipment according to the present invention is shown.

[0067] As shown in the figure, the access control management device includes a request receiving unit 11 , an inquiry determination unit 12 and a switching access unit 13 .

[0068] The request receiving unit 11 is configured to receive and analyze the first access request input by the user to obtain access information. The access information includes the user's identity information, the Modbus device that the user requests to access, the device location, and the access operation.

[0069] The query determination unit 12 is used to query and determine whether the access is legal according to the identity information, the Modbus device, the device point, the preset device...

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Abstract

The invention discloses an access control management method, device and system of Modbus equipment. The access control management device includes a request receiving unit, an inquiry judging unit, and a switching access unit. The access control management system includes an access control module, a data storage module and several Modbus devices. When the first access request input by the user is received, the authority verification is performed according to the preset device access authority database, and only when it is judged that the user has the authority corresponding to the first access request, the Modbus device corresponding to the first access request is allowed Corresponding access operations are performed, and the access control management method, device and system improve the security of Modbus equipment.

Description

technical field [0001] The invention relates to the field of access control management of Modbus equipment, in particular to a method, device and system for access control management of Modbus equipment. Background technique [0002] With the vigorous development of computer technology and network technology, the industrial control system has also undergone changes, and it has begun to develop in the direction of networking and openness. As the basis of industrial data communication network, fieldbus technology establishes a bridge between devices. Modbus is a common connection method for industrial electronic equipment, and its simple and reliable mechanism is the reason why it has been full of vitality for a long time. It is widely used in many industrial equipment, such as smart instrument, PLC, DCS, etc. At the same time, because of its simple mechanism, the data structure of the Modbus protocol cannot implement the user's authority verification function, and there is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/40H04L12/40
CPCH04L63/08H04L63/20H04L12/40H04L2012/40228
Inventor 谢飞苏浩楠
Owner 广州得一信息科技有限公司