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Domain Name System (DNS) Cookies

Document type: Replaced Internet-Draft (dnsop WG)
Document stream: IETF
Last updated: 2014-10-31 (latest revision 2014-10-11)
Intended RFC status: Unknown
Other versions: (expired, archived): plain text, pdf, html

IETF State: Adopted by a WG
Document shepherd: Tim Wicinski

IESG State: Replaced by draft-ietf-dnsop-cookies
Responsible AD: (None)
Send notices to: "Tim Wicinski" <>

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found here:


DNS cookies are a lightweight DNS transaction security mechanism that provides limited protection to DNS servers and clients against a variety of increasingly common denial-of-service and amplification / forgery or cache poisoning attacks by off-path attackers. DNS Cookies are tolerant of NAT, NAT-PT, and anycast and can be incrementally deployed.


Donald Eastlake <>
Mark Andrews <>

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