The study on network intrusion detection system of Snort

Network security is a complex and systematic project. The intrusion detection system is the first line of defense against network security. Snort is a famous intrusion detection system in the field of open source software. It is widely used in the intrusion prevention and detection domain in the world. In this paper, we explain how Snort implements the intrusion detection, which includes building the compiling environment and analysizing the work-flow and rule tree. This paper will provide a valuable reference for the study of Snort.