IP Firewall ASN format?

Hey folks

Trying to create a rule to block specific ASN as per PeeringDB - I found the specific ISP and entered the five-digit ASN but I get a “Country, IP address, or ASN not recognized” message when I try to add the rule. Any ideas?

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Another “Never Mind”… The ASN must be entered as AS[five digit] not only the five-digit number.

Sorted, thanks!

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Hi @freitasm,

Glad you found the answer to that one. For reference there’s a full guide here on the IP Firewall and all of the various options and input formats:

https://support.cloudflare.com/hc/en-us/articles/217074967-How-do-I-control-access-to-my-site-

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