Subfinder

Overview

Discover subdomains of a target domain using passive sources. Subfinder queries certificate transparency logs, DNS datasets, search engines, and other OSINT sources to enumerate subdomains without directly touching the target infrastructure.

Instructions

Installation

# Go install (requires Go 1.21+)
go install -v github.com/projectdiscovery/subfinder/v2/cmd/subfinder@latest

# Or download binary
# https://github.com/projectdiscovery/subfinder/releases

# Or Docker
docker pull projectdiscovery/subfinder:latest