Windows 2000 could best secure with a new suite of software Secure
Auditor which is capable of performing auditing, event log viewing,
windows password auditing, port scanning, windows inventory and asset
management, ftp brute force attack, http brute force attack etc. Check
it out from

http://www.download.com/Secure-Auditor/3000-2653-10826743.html?part=dl-SecureAud&subj=uo&tag=button

Secure Auditor is also capable of performing audit on Oracle, MSSQL
and Cisco routers. It also provides around 30 embedded security tools.
You know what is the best thing about Secure Auditor? It provides
complete specification and solution of identified vulnerabilities.
Just check it out!