The paper introduces a device linkage system on firewall between the network side and the switch side of user host
and introduces the audit system connected in parallel between the hubs and switches.Then
the paper introduces a method based on HTTP packet recognition network security device linkage
which is a technology of information security intrusion detection and prevention based on the network.It is mainly used to solve the existing network security equipment linkage blocking technology limitation poor problem.Finally
the test result shows that the method is practical and effective.