One last bit of wondering I have is about this paragraph from Security Considerations: "This method can be abused by intentionally deploying broken zones with agent domains that are delegated to victims. This is particularly effective when DNS requests that trigger error messages are sent through open resolvers [RFC8499] or widely distributed network monitoring systems that perform distributed queries from around the globe." Is this a novel risk presented by the proposal? Any more than, say, a random subdomain attack targeted directly at the agent domain? -- last-call mailing list last-call@xxxxxxxx https://www.ietf.org/mailman/listinfo/last-call