Unknown hacker measured the World Wide Web
Recently, the author, who did not wish to disclose his name, published an interesting study , from which he drew the following conclusions:
What is the size of the Internet?
You can count in different ways. At the time of the survey, 420 million IP addresses were registered that responded to requests using the ping command, plus another 36 million addresses with one or more open ports. Thus, about 450 million addresses can definitely be considered functioning and accessible to all Internet users.
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141 million IP addresses are protected from free access (“firewalled”). If we consider them, we get 591 million addresses. 729 million IP addresses have a reverse DNS entry. Together with them we will get 1.3 billion IP addresses.
The remaining 2.3 billion IP addresses were free.
That is, out of about 4 billion IPv4 addresses, less than half are occupied, and only 591 million are actively working.
The reason the author hides his name is that he used a botnet for his research. To collect and process information, he created a program that “infected” many computers around the world.
According to the laws of the United States, the author committed a crime, as botnets are usually created with malicious intent: sending spam, identity theft, organizing DDoS attacks, etc. However, in this case, an unknown hacker acted solely for peaceful purposes.
What is the size of the Internet?
You can count in different ways. At the time of the survey, 420 million IP addresses were registered that responded to requests using the ping command, plus another 36 million addresses with one or more open ports. Thus, about 450 million addresses can definitely be considered functioning and accessible to all Internet users.
')
141 million IP addresses are protected from free access (“firewalled”). If we consider them, we get 591 million addresses. 729 million IP addresses have a reverse DNS entry. Together with them we will get 1.3 billion IP addresses.
The remaining 2.3 billion IP addresses were free.
That is, out of about 4 billion IPv4 addresses, less than half are occupied, and only 591 million are actively working.
The reason the author hides his name is that he used a botnet for his research. To collect and process information, he created a program that “infected” many computers around the world.
According to the laws of the United States, the author committed a crime, as botnets are usually created with malicious intent: sending spam, identity theft, organizing DDoS attacks, etc. However, in this case, an unknown hacker acted solely for peaceful purposes.
Source: https://habr.com/ru/post/174557/
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