Embedded type industry ethernet safety gateway
A technology of security gateway and Ethernet, which is applied in the field of communication technology, network security technology and automatic control, which can solve the problems of security threats, inability to provide security protection, inability to be well compatible with EPA messages, inability to provide EPA system time synchronization, etc. Achieve reliable message forwarding and precise time synchronization
Inactive Publication Date: 2010-06-16
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology
At present, the security gateways used in industrial sites are not well compatible with EPA messages, and cannot provide good security protection for various security threats to industrial site equipment, and cannot provide time synchronization in the entire EPA system. Issues such as deterministic scheduling of EPA data packets
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[0017] figure 1 It is a structural diagram of the hardware system of the EPA security gateway. The hardware part of the EPA security gateway is mainly composed of three parts: the microprocessor CPU module, the Ethernet controller part, and the Ethernet power supply module. Among them, the main function of the CPU module is to realize specific network interface functions and execute related control information; the Ethernet controller module is mainly used to transmit data information of Ethernet field devices; The power supply function of the EPA security gateway. The Ethernet controller adopts the bus connection mode, and the CPU module provides different chip selection signals to realize the gating of different Ethernet controllers, thereby controlling different network channels. The EPA security gateway adopts power over Ethernet, that is, the power supply system and data transmission share a network cable, and the Ethernet and the LAN are connected to communicate data a...
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The invention discloses a safety gateway of industrial Ethernet, relating to the industrial control network safety technique. The invention can achieve message transmitting function, safety function and dispatching function in EPA safety gateway, and achieve the boundary protection of a field equipment connecting layer and a process monitor layer. The safety gateway adopts routing function and bridging function to achieve message transmission in the same net segment and different net segments, and adopts a multi-protection to prevent illegal message from entering the field equipment layer prevent the illegal operation of EPA equipment, prevent illegal modification and destroy of EPS message, and determine whether illegal external equipment is connected. The dispatching of data message in micro-net segment ensures the time synchronization based on a main clock in the entire system, and only one equipment is allowed to transmit data message in a certain time point so as to ensure that each equipment can transmit information in a determined time, thereby ensuring the realtime performance of the EPA network. The invention is suitable for safety protection of industrial Ethernet.
Description
technical field [0001] The invention relates to communication technology, network security technology and automatic control technology, in particular to a security gateway. Background technique [0002] With the development of technology, informatization accelerates the process of industrialization, more and more computer technology and network communication technology are applied to industrial control systems, such as embedded technology, PCS, ERP, MES and other enterprise information automation applications; enterprise information The network is connected to the Internet, etc. The application of these technologies brings security and real-time problems of the control network. How to ensure the interconnectivity, confidentiality, integrity, availability and real-time performance of industrial control systems has become a modern control system that needs to be considered. an important question. [0003] The promotion of the Industrial Ethernet EPA standard has led to more ...
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IPC IPC(8): H04L12/66H04L12/56H04L12/28H04L29/06
Inventor 王平王发茂向敏
Owner CHONGQING UNIV OF POSTS & TELECOMM