Domain Name System (DNS) Cookies

Document Type Replaced Internet-Draft (dnsop WG)
Last updated 2015-10-14 (latest revision 2014-10-11)
Replaced by draft-ietf-dnsop-cookies
Stream IETF
Intended RFC status (None)
Expired & archived
plain text pdf html
Stream WG state Adopted by a WG
Document shepherd Tim Wicinski
IESG IESG state Replaced by draft-ietf-dnsop-cookies
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active.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


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.)