// what it is
Description
John Matherly's continuously-updated index of every IPv4 host on the internet. Each host record includes open ports, service banners, TLS certificate chains, geolocation, ISP, and sometimes a screenshot. A free account gets you 100 results/month; paid plans unlock filters, exports, and the streaming firehose.
// use cases
What people use it for
- Find internet-exposed Industrial Control Systems
- Enumerate a target organization's perimeter from public data alone
- Track exposure of a specific CVE via 'product:Apache version:2.2'
- Pre-flight reconnaissance before active scanning
// commands
The commands you'll type
CLI init
$ shodan init <API_KEY>Find Apache 2.2 servers
$ shodan search 'apache 2.2 country:US' --limit 100Host detail
$ shodan host 1.1.1.1