Interoperable Domain Name System (DNS) Server Cookies

Document Type Replaced Internet-Draft (individual)
Authors Donald Eastlake  , Mark Andrews 
Last updated 2019-07-21
Replaced by RFC 9018
Stream (None)
Intended RFC status (None)
Expired & archived
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Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Replaced by draft-ietf-dnsop-server-cookies
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


DNS cookies, as specified in RFC 7873, are a lightweight DNS transaction security mechanism that provides limited protection to DNS servers and clients against a variety of denial-of-service and amplification, forgery, or cache poisoning attacks by off-path attackers. This document specifies a means of producing interoperable strong cookies so that an anycast server set including diverse implementations will interoperate with standard clients. This document updates RFC 7873.


Donald Eastlake (
Mark Andrews (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)