Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.| nmap.org
Well Known Port List: nmap-services| nmap.org
From explaining port scanning basics for novices to detailing low-level packet crafting methods used by advanced hackers, this book by Nmap's original author suits all levels of security and networking professionals.| nmap.org
-p <port ranges> (Only scan specified ports)| nmap.org
Official Download site for the Free Nmap Security Scanner. Helps with network security, administration, and general hacking| nmap.org
Verifying the Integrity of Nmap Downloads| nmap.org
The Full Disclosure mailing list is a public forum for detailed discussion of vulnerabilities and exploitation techniques, as well as tools, papers, news, and events of interest to the community. FD differs from other security lists in its open nature and support for researchers' right to decide how to disclose their own discovered bugs. The full disclosure movement has been credited with forcing vendors to better secure their products and to publicly acknowledge and fix flaws rather than hi...| nmap.org
Ncat is a free, open-source Netcat replacement for Linux, Windows, OS X and more. TLS/SSL encryption, proxy support, IPv6, Lua scripting.| nmap.org
Runs a script scan using the comma-separated list of filenames, script| nmap.org
Port Selection Data and Strategies| nmap.org