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Shodan is often referred to as "The World's Most Dangerous Search Engine". Developed by John Matherly, it grabs the banner of every IP address on the planet and then indexes the information from the banner.

Shodan is a wonderful resource for finding unprotected web cams, SCADA/ICS sites, and the Internet of Things (IoT).

Take a look at my tutorials below to learn more about using Shodan to hack or pentest.

1. Using Shodan: The World's Most Dangerous Search Engine

2. SCADA Hacking: Using Shodan to Find Vulnerable SCADA/ICS Sites

3. Using Shodan to Find Outdated and Vulnerable Systems

4. Using Shodan to Find F5 Sites Vulnerable to CVE-2020-5902

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