shuffleDNS – subdomain enumeration tool

ShuffleDNS is a command-line subdomain enumeration tool.

Written in Go and built as a wrapper around massdns, it’s aimed at reconnaissance workflows where you need to validate discovered subdomains or actively brute-force new ones against target domains. The project is designed for high-volume DNS processing, supports straightforward pipeline integration, and includes logic to reduce noisy results caused by wildcard DNS records.

This is free and open source software.

Key Features

• Enumerates valid subdomains using active brute-force against a supplied wordlist.
• Resolves existing subdomain lists and returns unique valid results.
• Handles wildcard DNS intelligently, including multi-level wildcard detection.
• Supports separate execution modes for bruteforce, resolve, and filter operations.
• Accepts input from files or standard input and fits neatly into automation pipelines.
• Offers NDJSON output, file output, retry controls, concurrency settings, and optional custom massdns commands.

Website: github.com/projectdiscovery/shuffledns
Support:
Developer: ProjectDiscovery
License: GNU General Public License v3.0

ShuffleDNS is written in Go. Learn Go with our recommended free books and free tutorials.

Explore our carefully curated directory of recommended free and open source software, covering every major software category. The directory forms part of our extensive collection of articles for Linux enthusiasts. It includes hundreds of detailed reviews, together with free and open source alternatives to proprietary software from companies such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. LinuxLinks also covers interesting projects worth exploring, Linux-compatible hardware, free programming books and tutorials, and much more. Know a useful free and open source Linux application that we haven’t covered? Tell us about it using our submission form.