"active Defense System Research

Now it is in the era of information explosion. With the widespread use of Internet, all kinds of attacks come into being and threaten every aspect of our lives. However, the traditional positive defense policies cannot meet the need on defending attacks and intrusions which happen frequently and change constantly. The concept of active defense becomes popular, as well as products.We intend to find the limitations and shortcomings of traditional positive defense technology by analyzing the potential threats on network security. Besides that, a comprehensive theme of active defense system is represented, which is helpful to choose network security system and develop network security technology.There are parts dealing with the core technologies, such as firewall, intrusion detection and protection, which are vital to security protection system. Also we propose improvement of these technologies and emphasize on the importance of active defense technology involving the linkage of IDS and firewall and linkage of IPS and IDS. After that we explain how to create the hierarchic security system with the integrated systematic linkage model.Additionally, from a user's perspective, there is a problem which 4s so critical to the implementation of active defense system, but has never been mentioned before. It exactly is how to enhance the intelligence of defense system to provide better services.In the following part, we explain, from a company's point, how to set out to choose the suitable network security products. At last, the theoretical analysis and implementation of protection system are put together to build the active defense system.