To allowlist domain/host names using WAF


I have used WAF functionality to permit & allowlist access’s based on IP address, but wondering how do we allowlist host name or domain name (Source) to permit access to a destination host name.

Thanks, I will appreciate your help.


Cloudflare doesn’t do reverse lookups on all the inbound connections, so you won’t be able to use the hostname of the requester in the WAF.

Other than the IP addresses you already use, you can also use ASN if the requester has their own ASN.

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