nmap
Nmap (Network Mapper) is a long-established open-source network discovery and security auditing tool, here mirrored on GitHub from its official SVN repository. Written primarily in C with a Lua scripting engine, it is widely used for host discovery, port scanning, and service detection across Linux and other platforms. With over 13,000 stars, it remains a foundational utility for network administrators and security professionals.
nmap/nmap | @nmap | C | 13,065 stars | 2,834 forks | Updated Jun 16, 2026
What It Does
Nmap, short for Network Mapper, is a network discovery and security auditing tool. According to its description, this repository is a GitHub mirror of the official SVN repository. The tool is commonly used to discover hosts on a network, scan for open ports, and identify running services and operating systems. Its topics list highlights capabilities and components such as network discovery, libpcap-based packet capture, asynchronous operation, and a Lua scripting engine (the Nmap Scripting Engine).
Who It Is For
This project appears useful for network administrators, system administrators, penetration testers, and security researchers who need to map networks and audit exposed services. Because it is primarily written in C with C++ and Lua components, it may also interest developers and contributors who want to study or extend low-level network scanning logic.
Why It Matters
Nmap is one of the most widely recognized tools in network security, and its longevity and large community (over 13,000 stars and 2,800+ forks) reflect sustained adoption. Having an official GitHub mirror makes it easier to browse the source, track changes, and reference the codebase alongside other tooling that lives on GitHub.
Likely Use Cases
- Host discovery and inventory across a local or remote network.
- Port scanning to identify open, closed, or filtered ports.
- Service and version detection on reachable hosts.
- Security auditing and reconnaissance during authorized penetration tests.
- Extending or automating scans through the Lua-based scripting engine.
What To Check Before Adopting It
Confirm that this mirror is current relative to the upstream SVN repository, since mirrors can lag behind the canonical source. Review the licensing terms carefully, as Nmap has specific licensing conditions that may affect redistribution or commercial use. Most importantly, ensure you have explicit authorization to scan any network or host, since unauthorized scanning can be illegal or against acceptable-use policies. Note that the machine-learning topic tag is present, but you should verify what, if any, machine-learning functionality is actually included before relying on it.
Quick Verdict
Nmap is a mature, broadly trusted network scanning and auditing tool, and this repository is a convenient GitHub mirror of the official source. It is a strong choice for legitimate network discovery and security testing, provided you verify the mirror’s currency, comply with its license, and only scan systems you are authorized to assess.