This map was made on August 2 by John Matherly, the founder ofShodan, a search engine for internet-connected devices. Matherly, who calls himself an internet cartographer, collected the data to put it together by sending ping requests toevery IP address on the internet, and storing the positive responses.
A ping is a network utility that sends an echo-request message (known as a packet) to an IP address—the internet's version of "hey, are you there?"
The red hot spots show where the most devices that can access the internet are located.
That part was relatively easy compared to the visualization process, says Matherly. "It took less than five hours to gather the data, and another 12 hours or so to generate the map image." For that, he used thematplotlibplotting library in the programing language Python.
With its rainbow of connectedness, the map issimilar toone produced last yearanonymously—which was illegal—and also tothis project by CAIDA(these links and the credit to CAIDA has been updated). Although Shodan is well-known for itspotentially shady practicesthat prey upon insecure networks, ping requests—the same thing your internet provider uses to test speed and data loss—are completelybenign, Matherly says. "We've just advanced enough in technology where we can do it on internet-scale."
Basically, Shodan is now able to send and receive the requests fast enough that the world can be queried in just a few hours.Armed with the new process, Matherly plans to track the changes in the globe's internet connectivity over time. With the proliferation of theInternet of Things, we're bound to see some of those black holes slowly colorize over the next few years. [Shodan]