常用工具
dsniff, password sniffer for several protocols
http://www.monkey.org/~dugsong/dsniff/
Snort
入侵检测系统（Intrusion Detection System）
河马webshell扫描器
FreeIPA – Identity Management System
FreeIPA is a free and open source identity management system. FreeIPA is the upstream open-source project for Red Hat Identity Management