Stop unauthorized CNAME domain mapping across accounts.
Cloudflare's CNAME Cross-User Banned policy is a security measure that prevents a domain configured as a CNAME from pointing to a hostname in a different Cloudflare account. This policy protects websites from domain hijacking and misconfiguration that could lead to service disruption or security breaches. It enforces that CNAME records stay within the same account, ensuring that only authorized users can manage DNS settings.
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