Skip to content

Instantly share code, notes, and snippets.

@petertwise
Created October 18, 2017 01:57
Show Gist options
  • Save petertwise/d2b047863c6201ea89dd4db683411a9e to your computer and use it in GitHub Desktop.
Save petertwise/d2b047863c6201ea89dd4db683411a9e to your computer and use it in GitHub Desktop.
Cheat Sheet for IP Address "wildcards" CIDR Notation - Subnet Mask
# These are the only common ones ever used...
# If you need a reference for anything inbetween these: https://tools.ietf.org/html/rfc4632#page-7
123.456.0.0/8 = 123.*.*.*
123.456.0.0/16 = 123.456.*.*
123.456.789.0/24 = 123.456.789.*
123.456.789.012/32 = 123.456.789.012
@rajithwijepura
Copy link

123.456.0.0/8
Where does 456 come up on IPv4 IP address?

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment