Intrusion detection in network security

With the development of computer network technology, the risk of network intrusion also increases greatly. But the traditional encryption and firewall technology can not meet the security needs of today. Therefore, intrusion detection technology is a new dynamic security mechanism developed rapidly in recent years. This paper studies the security mechanism used to detect and prevent system intrusion. Different from the traditional security mechanism, intrusion detection has the characteristics of intelligent monitoring, real-time detection, dynamic response and so on. In a sense, intrusion detection technology is a reasonable complement to firewall technology.