Introduction:
An error page indicating a CNAME configuration issue on Cloudflare.
Added on:
Jan 20, 2025
What is DNS Diagnosis
This page appears when a user requests a page on a website that is part of the Cloudflare network, but the host is configured as a CNAME across accounts, which is not allowed by Cloudflare's security policy.
How to Use DNS Diagnosis
If this is an R2 custom domain, it may still be initializing. If you have attempted to manually point a CNAME DNS record to your R2 bucket, you must do it using a custom domain. Refer to R2's documentation for details.
Use Cases of DNS Diagnosis
This page is used to inform users about the specific error they have encountered and provide guidance on how to resolve it.
FAQs from DNS Diagnosis
1
What happened?
You've requested a page on a website that is part of the Cloudflare network. The host is configured as a CNAME across accounts on Cloudflare, which is not allowed by Cloudflare's security policy.
2
What can I do?
If this is an R2 custom domain, it may still be initializing. If you have attempted to manually point a CNAME DNS record to your R2 bucket, you must do it using a custom domain. Refer to [R2's documentation](https://developers.cloudflare.com/r2/data-access/public-buckets/#connect-your-bucket-to-a-custom-domain) for details.