入侵检测系统是通过诸如，数据审计，网络报文分析等手段，检测各种入侵行为，保证网络安全。英文是intrusion detection system （IDS）。

-Intrusion detection system is through such, data auditing, network packet analysis tools, all kinds of intrusion detection to ensure network security. English is the intrusion detection system (IDS).