What is the CIDR notation for all IPv4 addresses?

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For example, the CIDR notation for the IPv4 block 192.168.100.0/22 represents the 1024 IPv4 addresses from 192.168.100.0 to 192.168.103.255.

I'm in an environment where everything is blocked by default, so need to open up the full IPv4-address space on port 443 to give the world access through https.

What is the CIDR notation for all IPv4 addresses?

networking
1 Answers

The so called default route is 0.0.0.0/0 and matches any IPv4 address.

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