DHCPv6 Options for private DNS Discovery
draft-pusateri-dhc-dns-driu-00

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Last updated 2018-07-02
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Internet Engineering Task Force                              T. Pusateri
Internet-Draft                                              Unaffiliated
Intended status: Informational                                 W. Toorop
Expires: January 3, 2019                                      NLnet Labs
                                                            July 2, 2018

                DHCPv6 Options for private DNS Discovery
                     draft-pusateri-dhc-dns-driu-00

Abstract

   This draft provides a series of DHCPv6 options for a DHCPv6 client to
   request from a DHCPv6 server to aid in configuring DNS servers that
   support private requests/responses.

Status of This Memo

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

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   This Internet-Draft will expire on January 3, 2019.

Copyright Notice

   Copyright (c) 2018 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
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   2
   2.  Trust . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  DHCPv6 Encapsulating Options  . . . . . . . . . . . . . . . .   3
   4.  DHCPv6 DNS over TLS Encapsulated Options  . . . . . . . . . .   5
     4.1.  IPv6 Address Option . . . . . . . . . . . . . . . . . . .   5
     4.2.  ADN Option  . . . . . . . . . . . . . . . . . . . . . . .   6
     4.3.  Port Option . . . . . . . . . . . . . . . . . . . . . . .   6
   5.  DHCPv6 DNS over DTLS Encapsulated Options . . . . . . . . . .   7
   6.  DHCPv6 DNS over HTTPS (DoH) Encapsulated Options  . . . . . .   7
     6.1.  URI Option  . . . . . . . . . . . . . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   9
     10.2.  Informative References . . . . . . . . . . . . . . . . .  10
   Appendix A.  ISC DHCPv6 Configuration Example . . . . . . . . . .  11
     A.1.  ISC DHCPv6 Server Configuration . . . . . . . . . . . . .  11
     A.2.  ISC DHCPv6 Client Configuration . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   There are three standardized forms for providing privacy to DNS
   including DNS over TLS (as defined in [RFC7858]), DNS over DTLS (as
   defined in [RFC8094]), and DNS over HTTPS (DoH) as defined in
   [I-D.ietf-doh-dns-over-https].  In order to use these encrypted forms
   of DNS securely, more information is needed by the client than the
   DNS Server list defined in Section 3 of [RFC3646].  This document
   defines three new DHCPv6 encapsulating options containing additional
   DHCPv6 options for clients to configure secure DNS in one of these
   forms.  Each top level option specifies ONE server.  Multiple servers
   are specified by including multiple instances of the same top level
   option with different encapsulated options.

1.1.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

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2.  Trust

   Encrypting the DNS transport provides privacy of the information
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