DNS Queries over HTTPS
draft-ietf-doh-dns-over-https-01

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Last updated 2017-10-30
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Network Working Group                                         P. Hoffman
Internet-Draft                                                     ICANN
Intended status: Standards Track                              P. McManus
Expires: May 3, 2018                                             Mozilla
                                                        October 30, 2017

                         DNS Queries over HTTPS
                   draft-ietf-doh-dns-over-https-01

Abstract

   DNS queries sometimes experience problems with end to end
   connectivity at times and places where HTTPS flows freely.

   HTTPS provides the most practical mechanism for reliable end to end
   communication.  Its use of TLS provides integrity and confidentiality
   guarantees and its use of HTTP allows it to interoperate with
   proxies, firewalls, and authentication systems where required for
   transit.

   This document describes how to run DNS service over HTTP using
   https:// URIs.

   [[ There is a repository for this draft at
   https://github.com/paulehoffman/draft-ietf-doh-dns-over-https ]].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 3, 2018.

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Copyright Notice

   Copyright (c) 2017 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Protocol Requirements . . . . . . . . . . . . . . . . . . . .   4
     4.1.  Non-requirements  . . . . . . . . . . . . . . . . . . . .   4
   5.  The HTTP Request  . . . . . . . . . . . . . . . . . . . . . .   4
     5.1.  DNS Wire Format . . . . . . . . . . . . . . . . . . . . .   5
     5.2.  Examples  . . . . . . . . . . . . . . . . . . . . . . . .   6
   6.  The HTTP Response . . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  Example . . . . . . . . . . . . . . . . . . . . . . . . .   7
   7.  HTTP Integration  . . . . . . . . . . . . . . . . . . . . . .   8
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
     8.1.  Registration of Well-Known URI  . . . . . . . . . . . . .   8
     8.2.  Registration of application/dns-udpwireformat Media Type    8
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  10
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  11
     11.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Appendix A.  Previous Work on DNS over HTTP or in Other Formats .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   The Internet does not always provide end to end reachability for
   native DNS.  On-path network devices may spoof DNS responses, block
   DNS requests, or just redirect DNS queries to different DNS servers
   that give less-than-honest answers.

   Over time, there have been many proposals for using HTTP and HTTPS as
   a substrate for DNS queries and responses.  To date, none of those

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