Method and device for preventing looped network protocol message from attacking device CPU

Abstract

The invention discloses a method and device for preventing a looped network protocol message from attacking a device CPU. The problems that when an existing looped network protocol message is prevented from attacking the device CPU, the normal operation of the looped network is affected and the abnormity of a looped network protocol is caused are solved. The method comprises that when one device detects that messages to be processed by the device are overspeed, random values for generating the characteristic values of the looped network protocol are generated and sent to each device in the looped network so that the hardware of each device can detect the received messages according to the newly generated characteristic values, and if the messages are not attacking messages, the messages are sent to the CPU to be processed. When the device detects that the looped network protocol messages to be processed by the device are overspeed, the looped network protocol characteristic values of each device in the looped network are started to be updated, the attacking messages can be filtered in time, and by means of the hardware judging method, the device CPU can be effectively prevented from being attacked by the looped network protocol messages.

Description

technical field [0001] The invention relates to the technical field of industrial Ethernet, in particular to a method and a device for preventing a ring network protocol message from attacking the CPU of a device. Background technique [0002] In order to ensure the security of industrial Ethernet, it is common to use the ring network protocol with fast switching capability for network planning. The ring network protocol is the guarantee for the normal communication of the network. If the ring network protocol is abnormal, it will have a great impact on the normal communication of the entire network. In severe cases, it may cause the network to be paralyzed. Therefore, the security of the ring network protocol is of great importance to the entire network. very important. [0003] Among the attacks on the ring network protocol, a serious attack is to counterfeit a large number of ring network protocol packets and attack the CPU of the devices in the ring network. In this at...

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Problems solved by technology

[0007] The embodiment of the present invention provides a method and device for preventing the ring network protocol message from attacking the device CPU, which is used to solve the problem of affecting the normal operation of the ring network and causing ring network protocol abnormalities when preventing the ring network protocol message from attacking the device CPU in the prior art The problem

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