LSE toolsLSE toolsNmap (130)Nmap (130)

Tool and Usage

Project details

Programming languages
C, C++, Lua, Python
Gordon Lyon
Latest release
Latest release date

Project health

This score is calculated by different factors, like project age, last release date, etc.


Nmap is short for "Network Mapper". It is a free and open source utility for network discovery and security auditing. It was release in September of 1997 by Gordon Lyon, commonly known under his pseudonym "Fyodor".

Usage and audience

Nmap is commonly used for network scanning or vulnerability scanning. Target users for this tool are pentesters, security professionals, and system administrators.

Example usage and output

Command: nmap -v -A

Starting Nmap 7.70 ( https://nmap.org ) at 2018-05-07 06:06 EDT
NSE: Loaded 148 scripts for scanning.
NSE: Script Pre-scanning.
Initiating NSE at 06:06
Completed NSE at 06:06, 0.00s elapsed
Initiating Parallel DNS resolution of 1 host. at 06:06
Completed Parallel DNS resolution of 1 host. at 06:06, 0.53s elapsed
Initiating SYN Stealth Scan at 06:06
Scanning [1000 ports]
Discovered open port 22/tcp on
Completed SYN Stealth Scan at 06:06, 0.04s elapsed (1000 total ports)
Initiating Service scan at 06:06
Scanning 1 service on
Completed Service scan at 06:06, 0.01s elapsed (1 service on 1 host)
Initiating OS detection (try #1) against
NSE: Script scanning
Nmap scan report for
Host is up (0.000048s latency).
Not shown: 999 closed ports
22/tcp open ssh OpenSSH 7.6p1 Debian 4 (protocol 2.0)
| ssh-hostkey:
| 2048 70:6e:3c:f7:7c:a8:4f:dc:eb:d3:b1:71:e0:57:b3:90 (RSA)
| 256 a7:30:7e:fe:69:51:45:44:6e:6c:18:5a:65:53:dc:d2 (ECDSA)
|_ 256 bd:93:9b:5b:36:fb:20:39:6b:b7:fa:74:52:52:d9:f8 (ED25519)
Device type: general purpose
Running: Linux 3.X|4.X
OS CPE: cpe:/o:linux:linux_kernel:3 cpe:/o:linux:linux_kernel:4
OS details: Linux 3.8 - 4.14
Uptime guess: 23.946 days (since Fri Apr 13 07:24:21 2018)
Network Distance: 0 hops
TCP Sequence Prediction: Difficulty=262 (Good luck!)
IP ID Sequence Generation: All zeros
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

NSE: Script Post-scanning.
Initiating NSE at 06:06
Completed NSE at 06:06, 0.00s elapsed
Read data files from: /usr/bin/../share/nmap
OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 2.78 seconds
Output of Nmap using a verbose scan that includes OS detection, script scanning, and version detection

Tool review and remarks

The review and analysis of this project resulted in the following remarks for this security tool:


  • + Project is mature (10+ years)
  • + The source code of this software is available
  • + Well-known author
  • + Well-known tool


  • - Software usage is restricted (e.g. commercially)

Author and Maintainers

Nmap is under development by Gordon Lyon.


Supported operating systems

Nmap is known to work on FreeBSD, Linux, Microsoft Windows, OpenBSD, and macOS.

Installation options

  • Package
  • Manual (compilation)
Nmap installation instructions

Nmap alternatives

Similar tools to Nmap:



Zenmap is the graphical user interface for the well-known network and vulnerability scanner Nmap. Read how it works in this review.



portSpider is a security tool to scan network ranges and find open ports. The goal of the tool is to find vulnerable services.



Vscan is a security tool to perform vulnerability scanning with Nmap. It leverages NSE scripts to provide some flexibility in terms of vulnerability detection and exploitation.

All Nmap alternatives

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This tool is categorized as a network port scanner and vulnerability scanner.