Summary

The provided text describes a critical security policy violation on a cloud hosting platform, noting that the server configuration is flawed because the CNAME is configured across accounts rather than properly on Cloudflares. This improper setup prevents users from directly configuring DNS records to point to the R2 bucket without manual intervention. Users who already performed a manual connection must adhere to a strict rule that requires the use of a custom domain to perform this task correctly.

The document explicitly warns that the host configuration is not permitted by Cloudflares security policies, indicating that the existing setup creates significant risk. If a user attempts to manually point a CNAME DNS record to their R2 bucket, they must instead perform the task using a custom domain to ensure compliance.

Title

CNAME Cross-User Banned | Cloudflare

Description

CNAME Cross-User Banned | Cloudflare

Keywords

page, website, security, more, details, custom, domain, cookies, error, cross, user, part, network, host, accounts, policy, https

NS Lookup

A 104.21.4.240, A 172.67.187.58

Dates

Created 2026-03-09

Updated 2026-04-07

Summarized 2026-04-06