This system build on the Linux bridge , Netfilter frame and Snort detection engine . Linux bridge transmits the data between the home net and extranet. Netfilter submits original data to detection engine and execute the response action.

• 该系统构建在Linux网桥、Netfilter框架和Snort检测引擎之上,网桥负责在防护目标和外部网络之间转发数据,Netfilter负责向检测引擎提交原始数据包及实施响应动作,检测引擎负责对数据包的检测。