SubFinder – Subdomain Discovery Tool

SubFinder is a subdomain discovery tool that discovers valid subdomains for websites by using passive online sources. It has a simple modular architecture and has been aimed as a successor to sublist3r project.

The tool uses Passive Sources, Search Engines, Pastebins, Internet Archives, etc to find subdomains and then it uses a permutation module inspired by altdns to generate permutations and resolve them quickly using a powerful bruteforcing engine.

SubFinder - Subdomain Discovery Tool
SubFinder – Subdomain Discovery Tool

Some of the features are:

  • Simple and modular code base making it easy to contribute.
  • Fast And Powerful Bruteforcing Module
  • Powerful Permutation generation engine. (In Development)
  • Many Passive Data Sources (31 At Present)
  • Multiple Output formats
  • Embeddable Project
  • Raspberry Pi Support

You can read more and download this tool over here: https://github.com/subfinder/subfinder

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