A curated list of awesome Internet port and host scanners, plus related components and much more, with a focus on free and open source projects.

There is no pre-established order of items in each category, the order is for contribution. If you want to contribute, please read the guide.

Discover more awesome lists at sindresorhus/awesome.

• Related Lists
• Port Scanners
• DNS Scanners
• Nmap Tools

• awesome-pcaptools - Useful in network traffic analysis.

• dscan - asynchronous TCP host scanner.
• masscan - TCP port scanner, spews SYN packets asynchronously, scanning entire Internet in under 5 minutes.
• netscanner - netscanner - TCP/UDP scanner to find open or closed ports
• nmap - the Network Mapper. Github mirror of official SVN repository. https://svn.nmap.org/
• zmap - a fast single packet network scanner designed for Internet-wide network surveys.

• dns-scanner - fast asynchronous NS scanner to locate subdomains.
• massdns - high-performance DNS stub resolver for bulk lookups and reconnaissance (subdomain enumeration).

• goscan - Interactive Network Scanner.
• LazyMap - Automate NMAP Scans and Generate Custom Nessus Policies Automatically.
• ObsidianSailboat - Nmap and NSE command line wrapper in the style of Metasploit.
• nmap-bootstrap-xsl - Nmap XSL implementation with Bootstrap.
• python-libnmap - libnmap is a python library to run nmap scans, parse and diff scan results. It supports python 2.6 up to 3.4.
• Sandmap - a tool supporting network and system reconnaissance using the massive Nmap engine. It provides a user-friendly interface, automates and speeds up scanning and allows you to easily use many advanced scanning techniques.
• Scantron - A distributed nmap / masscan scanning framework with web GUI.
• WebMap - Nmap Web Dashboard and Reporting.
• Zenmap - the official Nmap Security Scanner GUI. It is a multi-platform (Linux, Windows, Mac OS X, BSD, etc.) free and open source application.