DNS-over-HTTPS and DNS-over-TLS Server Discovery and Deployment Considerations for Home and Mobile Networks
draft-btw-add-home-04

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ADD                                                         M. Boucadair
Internet-Draft                                                    Orange
Intended status: Standards Track                                T. Reddy
Expires: September 17, 2020                                       McAfee
                                                                 D. Wing
                                                                  Citrix
                                                                 N. Cook
                                                            Open-Xchange
                                                          March 16, 2020

    DNS-over-HTTPS and DNS-over-TLS Server Discovery and Deployment
              Considerations for Home and Mobile Networks
                         draft-btw-add-home-04

Abstract

   This document discusses DoT/DoH deployment considerations for home
   networks.  It particularly sketches the required steps to use DoT/DoH
   capabilities provided by local networks.

   One of the goals of this document is to assess to what extent
   existing tools can be used to provide a DoT/DoH service.  As an
   outcome, new DHCP and Router Advertisement Options are specified in
   order to convey a DNS Authentication Domain Name.

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 September 17, 2020.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Boucadair, et al.      Expires September 17, 2020               [Page 1]
Internet-Draft         DoH/DoT in Home and Mobile             March 2020

   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
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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  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Sample Deployment Scenarios . . . . . . . . . . . . . . . . .   5
     3.1.  Managed CPEs  . . . . . . . . . . . . . . . . . . . . . .   5
     3.2.  Unmanaged CPEs  . . . . . . . . . . . . . . . . . . . . .   7
   4.  DNS Reference Identifier Option . . . . . . . . . . . . . . .   8
     4.1.  DHCPv6 DNS Reference Identifier Option  . . . . . . . . .   9
     4.2.  DHCP DNS Reference Identifier Option  . . . . . . . . . .  10
     4.3.  RA DNS Reference Identifier Option  . . . . . . . . . . .  10
   5.  DoH URI Templates . . . . . . . . . . . . . . . . . . . . . .  11
     5.1.  Define a Dedicated DHCP/RA Option . . . . . . . . . . . .  11
     5.2.  Retrieve the List Directly from the DoH Server  . . . . .  12
   6.  Locating DoH/DoT Servers  . . . . . . . . . . . . . . . . . .  12
     6.1.  DoT/DoH Auto-Upgrade  . . . . . . . . . . . . . . . . . .  14
     6.2.  Other Deployment Options  . . . . . . . . . . . . . . . .  15
   7.  DoT and DoH DNS-SD Considerations . . . . . . . . . . . . . .  15
   8.  Hosting DoH/DoT Forwarder in the CPE  . . . . . . . . . . . .  16
     8.1.  Managed CPEs  . . . . . . . . . . . . . . . . . . . . . .  16
       8.1.1.  ACME  . . . . . . . . . . . . . . . . . . . . . . . .  16
       8.1.2.  Redirection . . . . . . . . . . . . . . . . . . . . .  16
     8.2.  Unmanaged CPEs  . . . . . . . . . . . . . . . . . . . . .  17
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  18
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  20
     10.1.  DHCPv6 Option  . . . . . . . . . . . . . . . . . . . . .  20
     10.2.  DHCP Option  . . . . . . . . . . . . . . . . . . . . . .  20
     10.3.  RA Option  . . . . . . . . . . . . . . . . . . . . . . .  20
     10.4.  Service Name . . . . . . . . . . . . . . . . . . . . . .  21
   11. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  21
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  21
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