ZMap scans the entire Internet in an hour

Faster, Less Cost --

Here’s what you find when you scan the entire Internet in an hour: . . . .at the Usenix security conference in Washington, they announced ZMap, a tool that allows an ordinary server to scan every address on the Internet in just 44 minutes. . . . ZMap is “stateless,” meaning that it sends out requests and then forgets about them. Instead of keeping a list of oustanding requests, ZMap cleverly encodes identifying information in outgoing packets so that it will be able to identify responses. The lower overhead of this approach allows ZMap to send out packets more than 1,000 times faster than Nmap. So while an Internet-wide scan with Nmap takes weeks, ZMap can (with a gigabit network connection) scan the entire Internet in 44 minutes. . . .

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