Meteor

This is a security policy enforcement tool for administrators of platforms using Cloudflare's infrastructure. It prevents a specific type of misconfiguration or potential abuse where a CNAME DNS record from one user's domain is pointed to a resource, like an R2 bucket or SaaS application, that belongs to a different user account. This policy is crucial for maintaining account isolation, security, and preventing unauthorized domain takeovers.

• CNAME Cross-User Restriction: Actively blocks DNS setups where a CNAME record resolves to a hostname configured under a separate Cloudflare account, enforcing clear resource ownership boundaries.
• Prevents Domain Hijacking: Mitigates security risks by stopping scenarios where one user could potentially claim or interfere with another user's service by pointing a domain to it.
• Enforces Account Isolation: Maintains the fundamental security principle that resources and configurations are siloed within individual user accounts, preventing accidental or malicious cross-account dependencies.
• Guides Correct Configuration: When triggered, the tool provides a clear error message directing users, particularly those setting up R2 custom domains, to use the proper official method for linking their domain to their own bucket.