Network security audit and access system based on Openflow, network security audit method based on Openflow, and network security access method based on Openflow
A network security and security audit technology, applied in the field of network communication, can solve the problems of complex implementation technology and high equipment cost, and achieve the effect of simplifying the operation process and reducing the cost
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[0040] The present invention will be further described below in conjunction with the drawings and embodiments.
[0041] A security audit method includes the following steps:
[0042] A. The basic steps to extract audit logs from flow information are as follows:
[0043] 1) When the SDN controller sends the controller-to-switch's Modify-state, Read-state, and Send-packet three subtypes to the switch, and the switch initiates Packet-in, Flow-removed, Port-status and When there are 4 kinds of asynchronous messages such as Error, the controller extracts relevant flow information to form a flow record;
[0044] 2) The flow record includes the timestamp, destination / source IP address, destination / source MAC address, transport layer protocol type, destination / source port number, OpenFlow switch ID, OpenFlow switch interface and event type when extracting flow information;
[0045] 3) The SDN controller uses "destination IP address" + "time stamp" as the row key to insert the above flow record...
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