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This looks like following links but it is pretty crazy how you can "scan" the internet in a less than a six minutes. IPv4 is much smaller than you think.

https://www.securitynewspaper.com/2015/10/15/how-to-scan-whole-internet-3-7-billion-ip-addresses-in-few-minutes


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one subnet of IPv6 is 2^32 larger than the entire IPv4 space so it's not possible to do it on IPv6 space in any realistic time.

Granted there are heuristics to make it effective at finding machines so best not to assume this has real security properties.

Another fun IPv4 fact is we've "ran out of (new)" addresses a while back (USA/NA in 2015.) so big providers keep buying up and reusing old ones :marseyexcited: - they're very expensive now!


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IIRC the internet map used a huge botnet over months, it's really not that simple

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Actually following links on active web servers is quite a feat I'd assume.


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tom7 scanned the entirety of the ipv4 space and yeah its tiny as shit. and a huge chunk of it is cordoned off p[urely for LAN.

https://youtube.com/watch?v=JcJSW7Rprio?t=262

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