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Shodan IoT Search Engine

Search the internet for everything but webpages, ie on other ports, like IoT, cameras and other connected devices: Shodan is a specialized search engine that indexes metadata from Internet-connected devices, including servers, routers, industrial control systems, and Internet of Things (IoT) hardware. By scanning the global IP space and parsing service banners, the platform identifies active ports, software versions, and geographic locations without relying on traditional web crawling. It provides technical professionals with granular data on device configurations and potential vulnerabilities, offering tools for external attack surface management and a programmatic API for automated threat intelligence integration.

Tip: a must for own network security checks; replaces or aggregates many command line tools.

In IT, professionals utilize Shodan to audit the exposure of Industrial Control Systems (ICS) and Supervisory Control and Data Acquisition (SCADA) networks, ensuring that critical infrastructure remains isolated from the public internet. Quality assurance teams leverage the platform to detect misconfigured firmware or unauthorized hardware deployments across distributed production facilities, while innovation researchers apply its historical datasets to track the global adoption of emerging communication protocols. By identifying open administrative interfaces and unencrypted services, these experts maintain operational integrity and benchmark the security posture of complex technological ecosystems against industry standards.

Disciplines: Cybersecurity, Network engineering, OSINT, IoT, Industrial automation.
Free alternative to Censys, ZoomEye, Fofa.
Shodan IoT Search Engine compared with Censys, ZoomEye and Fofa
ShodanCensysZoomEyeFofa
Data scope: It indexes Internet-connected devices beyond websites, and states it crawls the entire Internet every week.Data scope: Its map of the Internet covers IPs, ports and services, certificates, web properties and DNS.Data scope: It is described as a search engine of Internet-connected devices, used for asset discovery, OSINT and threat intelligence.Data scope: It is described as a cyberspace search engine that matches network assets, with industrial control security among its topics.
Access and cost: A free account is available. Membership is a one time payment listed for a lifetime upgrade, with 100 monthly query credits, 100 monthly scan credits and 16 monitored IPs.Access and cost: Legacy Search is no longer available to Free users, who are directed to the Censys Platform. An account is needed for API credentials.Access and cost: A free account can be created. Paid access is offered, and the free tier limits are not published on the home page.Access and cost: A login is required. Plans are listed on a pricing page.
API: The Developer API exposes crawling, IP lookups, searching and data streaming.API: API credentials come from the account page, with API documentation and a getting started guide.API: The site links to API documentation and API tools.
Exposure monitoring: Shodan Monitor tracks devices in your network range that are reachable from the Internet and sends notifications when something unexpected appears.Exposure monitoring: Its attack surface management product monitors the external attack surface continuously.Exposure monitoring: The vendor says it supports attack surface management.

Topics covered: Shodan, IoT, Internet-connected devices, metadata, industrial control systems, service banners, active ports, software versions, geographic locations, external attack surface management, API, threat intelligence, Industrial Control Systems (ICS), Supervisory Control and Data Acquisition (SCADA), operational integrity, security posture, communication protocols, ISO/IEC 27001, NIST SP 800-53, IEC 62443, ISO 31000, and ISO/IEC 27032..

Privacy: we have no feedback of potential problem with this tool and author. But like many online services, you are here providing them with your own data. Depending of the criticity of your data, this is your responsibility to assess author's reputation and potential misusage, and to check and accept their terms and conditions, or not.

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