How to properly whitelist an IP range in the firewall?


Hello CF community,

I have been having some problems using the proper format to whitelisting an IP range. The two ranges we wish to whitelist are – and – I did the following format for the second range: however I am not sure if it is correct.

Any help is much appreciated!

Thank you,


Absolutely correct :slight_smile:
You can use /24 for the first network as well.
I am not sure if CF accepts the first notation.

If you need help in calculating sub/supernets you can use tools like



Thank you for your response! So for the first range, would the proper format be,,,


Yes. Or simply

Didn’t notice that it was 156 to 159, sorry.


Great, thank you so much for the help!

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