Browse Prior Art Database

Domain Name System (DNS) Cookies (RFC7873) Disclosure Number: IPCOM000246745D
Original Publication Date: 2016-May-01
Included in the Prior Art Database: 2016-Jun-29
Document File: 50 page(s) / 55K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Eastlake 3rd: AUTHOR [+2]


As with many core Internet protocols, the Domain Name System (DNS) was originally designed at a time when the Internet had only a small pool of trusted users. As the Internet has grown exponentially to a global information utility, the DNS has increasingly been subject to abuse.

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Internet Engineering Task Force (IETF)                   D. Eastlake 3rd Request for Comments: 7873                                        Huawei Category: Standards Track                                     M. Andrews ISSN: 2070-1721                                                      ISC                                                                 May 2016

                     Domain Name System (DNS) Cookies


   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 (Network Address Translation -    Protocol Translation), and anycast and can be incrementally deployed.    (Since DNS Cookies are only returned to the IP address from which    they were originally received, they cannot be used to generally track    Internet users.)

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

Eastlake & Andrews           Standards Track                    [Page 1]
 RFC 7873                       DNS Cookies                      May 2016

 Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents    ( in effect on the date of    publication of this document.  Please review these documents    carefully, as they describe your rights and restrictions with respect    to this document.  Code Components extracted from this document must    include Simplified BSD License text as described in Section 4.e of    the Trust Legal Provisions and are provided without warranty as    described in the Simplified BSD License.

Eastlake & Andrews           Standards Track                    [Page 2]
 RFC 7873                       DNS Cookies   ...