IPv4 Census Map Carna Botnet —
The Carna Botnet was a botnet of 420,000 devices created byhackers to measure the extent of the Internet in what the creators called the “Internet Census of 2012”. The data was collected by infiltrating Internet devices, especiallyrouters, that used a default password or no password at all. It was named after Cardea, the roman goddess associated with door hinges. Of the 4.3 billion possible IPv4 addresses, Carna Botnet found a total of 1.3 billion addresses in use, including 141 million that were behind a firewall and 729 million that returned reverse domain name system records. The remaining 2.3 billion IPv4 addresses are probably not used.
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