Nmap (“Network Mapper”) is a free and open source (license) utility for network exploration or security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime.
Nmap and Zenmap (the graphical front end) are available in several versions and formats. Recent source releases and binary packages are described below. Older version (and sometimes newer test releases) are available from theÂ dist directory (and really old ones are inÂ dist-old). For the more security-paranoid (smart) users, GPG detached signatures and SHA-1 hashes for each release are available in theÂ sigs directory (verification instructions). Before downloading, be sure to read the relevant sections for your platform from theÂ Nmap Install Guide. The most important changes (features, bugfixes, etc) in each Nmap version are described in theÂ Changelog. Using Nmap is covered in theÂ Reference Guide, and don’t forget to read the otherÂ available documentation, particularly the new bookÂ Nmap Network Scanning!