# nmap/nmap

Nmap - the Network Mapper. Github mirror of official SVN repository.

Repository: https://github.com/nmap/nmap
Canonical: https://ross.abutalabs.com/products/nmap
Homepage: https://svn.nmap.org/
Language: C
License: NOASSERTION
License Family: other
Topics: c-plus-plus, lua, security, port-scanner, machine-learning, linux, windows, osx, network-discovery, service-discovery, asynchronous, socket, nmap, libpcap, pcre, netcat, ping
Last push: 2026-08-24T03:00:06+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 5290, "days_push": 9, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 13465, forks 2890 (observed 2026-08-28T04:11:03.364123+00:00)

## What it is
Nmap is the industry-standard open-source network scanner for host discovery, port scanning, service/version detection, and OS fingerprinting, extensible via the NSE Lua scripting engine. It includes companion tools like Zenmap (GUI), Ncat, and Ndiff.

## Use cases
- scan a network for open ports
- discover live hosts on my subnet
- identify services and versions running on a server
- fingerprint the operating system of a remote host
- run vulnerability detection scripts against targets
- audit firewall rules and network exposure

## When to choose
- you need reliable, battle-tested network/port scanning
- you want scriptable scanning via the NSE Lua engine
- you need cross-platform support with a GUI option (Zenmap)

## When to avoid
- you need a pure library to embed scanning in your own app
- you want a lightweight single-purpose port checker
- scanning networks you don't own or have permission to test

## Facets
- artifact type: cli-tool
- maturity: stable
- function: security, networking, penetration-testing, cli
- domain: security, networking, penetration-testing
- platform: windows, cross-platform, cli
- tags: port-scanner, network-discovery, service-discovery, nse-scripts, zenmap, os-fingerprinting, command-line, linux, macos

## Member repositories
- nmap/nmap (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:03.364123+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:13:17.145113+00:00, confidence not recorded.
  - readme: https://github.com/nmap/nmap (fetched 2026-08-28T04:11:03.364123+00:00, sha df2301820295)
  - homepage: https://svn.nmap.org/ (fetched 2026-08-29T08:08:08.931531+00:00, sha cdbcdb5ecc74)
  - site_page: https://svn.nmap.org/nmap-releases (fetched 2026-08-29T08:08:08.941128+00:00, sha 5eb23552b036)
- Data as of 2026-08-30T08:39:29.467469+00:00.