Requirements for Adaptive DNS Discovery
draft-box-add-requirements-00

Document Type Active Internet-Draft (individual)
Authors Chris Box  , Tommy Pauly  , Christopher Wood  , Tirumaleswar Reddy.K 
Last updated 2020-09-04
Replaces draft-pauly-add-requirements
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ADD                                                               C. Box
Internet-Draft                                                        BT
Intended status: Informational                                  T. Pauly
Expires: March 8, 2021                                             Apple
                                                               C.A. Wood
                                                              Cloudflare
                                                                T. Reddy
                                                                  McAfee
                                                       September 4, 2020

                Requirements for Adaptive DNS Discovery
                     draft-box-add-requirements-00

Abstract

   Adaptive DNS Discovery is chartered to define mechanisms that allow
   clients to discover and select encrypted DNS resolvers.  This
   document describes several use cases for discovering DNS resolvers
   that support encrypted transports, and lists requirements that any
   proposed discovery and selection mechanisms should address.

Discussion Venues

   This note is to be removed before publishing as an RFC.

   Source for this draft and an issue tracker can be found at
   https://github.com/ietf-wg-add/draft-add-requirements.

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 https://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 March 8, 2021.

Box, et al.               Expires March 8, 2021                 [Page 1]
Internet-Draft                   ADDREQ                   September 2020

Copyright Notice

   Copyright (c) 2020 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 (https://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 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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Discovery of associated resolvers . . . . . . . . . . . . . .   4
     3.1.  Network-provisioned resolvers . . . . . . . . . . . . . .   5
       3.1.1.  Unencrypted forwarder . . . . . . . . . . . . . . . .   6
       3.1.2.  Encrypted forwarder . . . . . . . . . . . . . . . . .   6
     3.2.  Client-selected resolvers . . . . . . . . . . . . . . . .   7
     3.3.  VPN resolvers . . . . . . . . . . . . . . . . . . . . . .   7
   4.  Discovery of limited domain resolvers . . . . . . . . . . . .   8
     4.1.  Discover a mapping between a locally-hosted domain and a
           resolver  . . . . . . . . . . . . . . . . . . . . . . . .   8
       4.1.1.  Encrypted resolvers for local or home content . . . .   9
       4.1.2.  Locally-cached content  . . . . . . . . . . . . . . .   9
       4.1.3.  Private enterprise names  . . . . . . . . . . . . . .  10
     4.2.  Encrypted resolvers for content providers . . . . . . . .  10
   5.  Privacy and security requirements . . . . . . . . . . . . . .  11
     5.1.  On opportunistic encryption . . . . . . . . . . . . . . .  12
     5.2.  Handling exceptions and failures  . . . . . . . . . . . .  13
   6.  Requirements Summary  . . . . . . . . . . . . . . . . . . . .  13
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  14
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  14
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  14
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  16
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  16

Box, et al.               Expires March 8, 2021                 [Page 2]
Internet-Draft                   ADDREQ                   September 2020
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