Research Of Network Information Discovery And Isolation Technology Based On OSPF

With the rapid development of Internet, people benefit from it more and more. But internet comes into a more complex situation in security. Nowadays, net worms is among the first class threats of internet, the blast of worm causes more and more lost; intrusions occur much more frequently; with the information flood in the internet, some mal-information can spread over the internet, it can make people corrupted. So the way of stopping such spread of information becomes our hot view. Meanwhile, the isolation technology of mal-nodes becomes the most important research area for us researchers in network security.The research scope of this paper is the technology of end host isolation in large-scale network, effect validation, the flow redirection and the information discovery technology in network. This paper introduced the development of routing protocol, isolation technology, and then introduced the research scope of isolation technology around the world. And then analyzed the OSPF (Open Shortest Path First) protocol, introduced the routing hierarchy feature of it, analyzed the diffuse process, and the theory of how it works. And introduced the information discover technology, which includes topology discovery, host scan and host OS detection, etc. and is needed by the isolation technology. And then introduced the principal of end host isolation technology based on OSPF, put forward two methods of isolation: configure IP address and configure the routing table. And the compared the use area and the speed of this two methods. Then it introduced the effect validation and flow redirection technology. Finally, this paper designed the frame of the isolation system based on OSPF routing protocol, and implemented it, got the conclusion.