mallyn writes "This is an article about a search engine that is designed to look for devices on the net that are not really intended to be viewed and used by the general public. Devices include pool filters, skating rink cooling system, and other goodies. 'Shodan runs 24/7 and collects information on about 500 million connected devices and services each month. It's stunning what can be found with a simple search on Shodan. Countless traffic lights, security cameras, home automation devices and heating systems are connected to the Internet and easy to spot. Shodan searchers have found control systems for a water park, a gas station, a hotel wine cooler and a crematorium. Cybersecurity researchers have even located command and control systems for nuclear power plants and a particle-accelerating cyclotron by using Shodan. ... A quick search for "default password" reveals countless printers, servers and system control devices that use "admin" as their user name and "1234" as their password. Many more connected systems require no credentials at all — all you need is a Web browser to connect to them.'"