Discover the power of Nmap, the industry leading network exploration tool. Developed by the talented Gordon Lyon, Nmap is designed to make network discovery and security auditing effortless. With a comprehensive set of features, Nmap provides users with unparalleled insights into network activity. From discovering hosts and services to identifying vulnerabilities and creating custom scripts, Nmap puts the power of network exploration at your fingertips. Download Nmap today and start exploring your network like never before!

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 uses raw IP packets in novel ways to determine what hosts are available on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics.

It was designed to rapidly scan large networks, but works fine against single hosts. Nmap runs on all major computer operating systems, and official binary packages are avalable for Linux, Windows, and Mac OS X. In addition to the classic command-line Nmap executable, the Nmap suite includes an advanced GUI and results viewer (Zenmap), a flexible data transfer, redirection, and debugging tool (Ncat), and a utility for comparing scan results (Ndiff).

Nmap is ...

Flexible: Supports dozens of advanced techniques for mapping out networks filled with IP filters, firewalls, routers, and other obstacles. This includes many port scanning mechanisms (both TCP & UDP), OS detection, version detection, ping sweeps, and more. See the documentation page.
Powerful: Nmap has been used to scan huge networks of literally hundreds of thousands of machines.
Portable: Most operating systems are supported, including Linux, Microsoft Windows, FreeBSD, OpenBSD, Solaris, IRIX, Mac OS X, HP-UX, NetBSD, Sun OS, Amiga, and more.
Easy: While Nmap offers a rich set of advanced features for power users, you can start out as simply as "nmap -v -A targethost". Both traditional command line and graphical (GUI) versions are available to suit your preference. Binaries are available for those who do not wish to compile Nmap from source.
Free: The primary goals of the Nmap Project is to help make the Internet a little more secure and to provide administrators/auditors/hackers with an advanced tool for exploring their networks. Nmap is available for free download, and also comes with full source code that you may modify and redistribute under the terms of the license.
Well Documented: Significant effort has been put into comprehensive and up-to-date man pages, whitepapers, tutorials, and even a whole book! Find them in multiple languages here.
Supported: While Nmap comes with no warranty, it is well supported by a vibrant community of developers and users. Most of this interaction occurs on the Nmap mailing lists. Most bug reports and questions should be sent to the nmap-dev list, but only after you read the guidelines. We recommend that all users subscribe to the low-traffic nmap-hackers announcement list. You can also find Nmap on Facebook and Twitter. For real-time chat, join the #nmap channel on Freenode or EFNet.
Acclaimed: Nmap has won numerous awards, including "Information Security Product of the Year" by Linux Journal, Info World and Codetalker Digest. It has been featured in hundreds of magazine articles, several movies, dozens of books, and one comic book series. Visit the press page for further details.
Popular: Thousands of people download Nmap every day, and it is included with many operating systems (Redhat Linux, Debian Linux, Gentoo, FreeBSD, OpenBSD, etc). It is among the top ten (out of 30,000) programs at the Freshmeat.Net repository. This is important because it lends Nmap its vibrant development and user support communities.

New Release
Upgraded included libraries:
Source: libpcap 1.10.7, pcre2 10.49, lua 5.4.9, libdnet 1.18.2
Binary installers: OpenSSL 3.5.9, Python 3.14.8
[Windows]Upgraded the included version of Npcap from 1.88 to 1.89, resolving one crash and upgrading to libpcap 1.10.7. See https://npcap.com/changelog
[Security][NSE]Karan Bamal of SentinelOne reported the following issues with NSE scripts and libraries, which have all been fixed:
afp.lua used a hardcoded DH private exponent, so that credentials passed via command line could be decrypted from network traffic. The DHCAST128 UAM is known to be cryptographically broken, and has been replaced in this release with DHX2.
Redirect to unverified URL in anyconnect.lua and upnp.lua
Unbounded memory consumption in rpc.lua, drda.lua, eigrp.lua, msrpctypes.lua, db2-das-info, and dns-zone-transfer
Uninterruptible CPU usage (infinite loop) not subject to --script-timeout or --host-timeout in rdp.lua, tn3270.lua, and ospf.lua
Infinite loop waiting for errored coroutines in tftp.lua, effectively mitigated by --script-timeout
[Security]Zach Hanley of Horizon3.ai, in collaboration with Claude and Anthropic Research, reported three issues, which have all been fixed:
Two distinct use-after-free bugs in massdns parallel DNS resolver.
NSE uses the default seed for Lua's pseudorandom number generator, namely the output of time() and the heap address of the Lua state. A brute-force search based on math.random()-generated network traffic can reveal the ASLR base address of the process.
[Security][NSE]In some non-standard builds (e.g. --without-openssl), NSE scripts were attempting to load missing Lua modules from the current working directory. Fixed by removing Lua's default package searchers, leaving only the existing nselib file fetcher.
Added a libfuzzer-based framework for fuzzing internal functions of Nmap, Ncat, and Nping. So far, 10 functions have been instrumented and 3 minor issues have been fixed. [Daniel Miller]
[GH#3523]Fixed an rare false-p
[ Nmap release history ]

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