theharvester
Tool for gathering e-mail accounts and subdomain names from public sources
network-informationRed Team
Toolnetwork-informationredLinuxKali LinuxPlatforms: Linux · Last verified September 6, 2026
The package contains a tool for gathering subdomain names, e-mail addresses, virtual hosts, open ports/ banners, and employee names from different public sources (search engines, pgp key servers).
Only use this tool against systems you own or are explicitly authorized to test — see the disclaimer.
Getting started
Install on Kali Linux with `sudo apt install theharvester`. See the official Kali tool page and upstream homepage linked above for full usage and configuration details.
