NmapNT is UNIX' porting of its legendary nmap scanner. nmap is a very comprehensive tool, with which (for example) stealth-scans can be conducted. The scanner runs on the command line and is thus not very easy to use. Be sure to read the README file before using this tool. A classic. Recommendable for advanced users. A very powerful tool.
nmapnt.exeoriginal.exewin_2000.exewin_9x.exewin_nt.exe