The internet is big. Really big. You just won’t believe how vastly, hugely, mind-bogglingly big it is
How big is the total number of IPv4 is easy to calculate, but how many of these IPs are active and reply to a random machine on the internet?
This is a recent article about a guy that scanned the whole internet to find what ranges are more active than others and what are still unused. Also, he compared the new information with another scan from 2012, showing multiple differences between the two.
I’m also curious about these kinds of results, and while reading the article I was thinking if to maybe create even more results on different subsets of the internet and trying to analyze that subset for a full week to start finding patterns or not.
Another interesting (and funny) side-note. He used a famous tool called masscan
to simplify the scan, and there is a file in there called “exclude.conf” with the ranges that you want to exclude from the scan. Of course, there are the usual ones: “0.0.0.0/8”, “10.0.0.0/8” etc, but since the tool is used multiple times, more ranges have been added to the list, and in the file
, there is the email from the organization who contacted him to add a particular range to the exclude file. I think this is the most interesting one:
Stop scanning and probing our network, 188.8.131.52/16. We are a defense contractor and report to Federal law enforcement authorities when scans and probes are directed at our network. I assume you don’t want to be part of that report.