Shodan

A search engine designed to scan and index devices connected to the internet. Shodan is often referred to as the "search engine for hackers" or a tool for exploring the Internet of Things (IoT). Shodan focuses on identifying and cataloging internet-connected devices, such as servers, routers, webcams, industrial control systems (ICS), and other IoT devices. It does this by scanning IP addresses and ports, collecting metadata like banners (service responses), and making that information searchable.

Launched in 2009 by John Matherly, Shodan allows users to find devices based on criteria like location, operating system, software version, or even specific vulnerabilities. For example, you could search for unprotected webcams, open industrial systems, or servers running outdated software.

Shodan is a powerful tool for cybersecurity professionals to assess network exposure, but it’s also used by researchers, hobbyists, and, controversially, sometimes malicious actors looking for exploitable targets. The name "Shodan" is a nod to the AI from the System Shock video game series, reflecting its role as a window into the digital underbelly of the internet. You will not find website text string results by keyword however you will find a mapping of the raw, often unsecured infrastructure of the Internet.