Http://soft.yesky.com/softchannel/72348998979026944/20040519/1799285.shtml
http://www.ids.ac.uk/ids/
Http://ids.sourceforge.net/
http://idsdialup1.ids.net/ids/
http://tech.ccidnet.com/pub/html/network/focus/ids/
Vulnerability detection
Http://blog.9cbs.net/lalphbet/archive/2004/11/14/181343.aspx
