Automating DNSSEC Delegation Trust Maintenance
RFC 7344

 
Document Type RFC - Informational (September 2014; No errata)
Last updated 2014-09-02
Replaces draft-kumari-ogud-dnsop-cds
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Stream WG state Submitted to IESG for Publication
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Document shepherd Tim Wicinski
Shepherd write-up Show (last changed 2014-05-05)
IESG IESG state RFC 7344 (Informational)
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Responsible AD Joel Jaeggli
Send notices to dnsop-chairs@ietf.org, draft-ietf-dnsop-delegation-trust-maintainance@ietf.org
IANA IANA review state IANA OK - Actions Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                         W. Kumari
Request for Comments: 7344                                        Google
Category: Informational                                   O. Gudmundsson
ISSN: 2070-1721                                          OGUD Consulting
                                                              G. Barwood
                                                          September 2014

             Automating DNSSEC Delegation Trust Maintenance

Abstract

   This document describes a method to allow DNS Operators to more
   easily update DNSSEC Key Signing Keys using the DNS as a
   communication channel.  The technique described is aimed at
   delegations in which it is currently hard to move information from
   the Child to Parent.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   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).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7344.

Copyright Notice

   Copyright (c) 2014 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
   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.

Kumari, et al.                Informational                     [Page 1]
RFC 7344              Delegation Trust Maintenance        September 2014

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
     1.2.  Requirements Notation . . . . . . . . . . . . . . . . . .   4
   2.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  DNS Delegations . . . . . . . . . . . . . . . . . . . . .   5
     2.2.  Relationship between Parent and Child DNS Operators . . .   5
       2.2.1.  Solution Space  . . . . . . . . . . . . . . . . . . .   6
       2.2.2.  DNSSEC Key Change Process . . . . . . . . . . . . . .   7
   3.  CDS (Child DS) and CDNSKEY (Child DNSKEY) Record Definitions    7
     3.1.  CDS Resource Record Format  . . . . . . . . . . . . . . .   8
     3.2.  CDNSKEY Resource Record Format  . . . . . . . . . . . . .   8
   4.  Automating DS Maintenance with CDS/CDNSKEY Records  . . . . .   8
     4.1.  CDS and CDNSKEY Processing Rules  . . . . . . . . . . . .   9
   5.  CDS/CDNSKEY Publication . . . . . . . . . . . . . . . . . . .   9
   6.  Parent-Side CDS/CDNSKEY Consumption . . . . . . . . . . . . .   9
     6.1.  Detecting a Changed CDS/CDNSKEY . . . . . . . . . . . . .  10
       6.1.1.  CDS/CDNSKEY Polling . . . . . . . . . . . . . . . . .  10
       6.1.2.  Polling Triggers  . . . . . . . . . . . . . . . . . .  11
     6.2.  Using the New CDS/CDNSKEY Records . . . . . . . . . . . .  11
       6.2.1.  Parent Calculates DS  . . . . . . . . . . . . . . . .  12
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   8.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  12
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  13
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  14
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  15
     11.2.  Informative References . . . . . . . . . . . . . . . . .  15
   Appendix A.  RRR Background . . . . . . . . . . . . . . . . . . .  17
   Appendix B.  CDS Key Rollover Example . . . . . . . . . . . . . .  17

Kumari, et al.                Informational                     [Page 2]
RFC 7344              Delegation Trust Maintenance        September 2014

1.  Introduction

   The first time a DNS Operator signs a zone, they need to communicate
   the keying material to their Parent through some out-of-band method
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