



DNSOP                                                   T. Wicinski, Ed.
Internet-Draft                                              2 March 2026
Updates: 6603, 6890 (if approved)                                       
Intended status: Best Current Practice                                  
Expires: 3 September 2026


Updates to Locally Served DNS Zones and IP Special-Purpose Address Space
                               Registries
                       draft-dnsop-rfc6303-bis-01

Abstract

   RFC 6063, "Locally Served DNS Zones", defines two IANA registries
   called "IPv4 Locally-Served DNS Zone" and "IPv6 Locally-Served DNS
   Zone" registries.  This document changes the registration policy for
   that registry from "IETF Review" to "Expert Review".

   Also, this document updates IP Special-Purpose Address Space
   registries to indicate whether an IP address block is eligible to be
   in Locally-Served DNS Zones.  Eligible entries will be automatically
   added to the Locally-Served DNS Zones.

   This document updates RFC 6063 and RFC 6890.

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
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   This Internet-Draft will expire on 3 September 2026.

Copyright Notice

   Copyright (c) 2026 IETF Trust and the persons identified as the
   document authors.  All rights reserved.





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   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
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   provided without warranty as described in the Revised BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Updates to RFC 6063 . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Guidance for Designated Experts . . . . . . . . . . . . .   3
     3.2.  Changes to the IPv6 Locally-Served DNS Zones Registry . .   4
   4.  Changes to the IP Special-Purpose Space Registries  . . . . .   4
     4.1.  Eligible to Locally-Served DNS Zones New Column . . . . .   4
     4.2.  Eligible to Locally-Served DNS Zones Note . . . . . . . .   4
     4.3.  IPv6 Locally-Served DNS Zone Registry Note  . . . . . . .   4
     4.4.  IPv4 Locally-Served DNS Zone Registry Note  . . . . . . .   4
     4.5.  Initial IPv6 Locally-Served DNS Zone Registry . . . . . .   5
     4.6.  Initial IPv4 Locally-Served DNS Zone Registry . . . . . .   5
   5.  Operational Considerations  . . . . . . . . . . . . . . . . .   5
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .   6
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   [RFC6303] "Locally Served DNS Zones", it defines two IANA registries
   called "IPv4 Locally-Served DNS Zone" and "IPv6 Locally-Served DNS
   Zone" registries.  This document changes the registration policy for
   that registry from "IETF Review" to "Expert Review".

   Also, this document updates IP Special-Purpose Address Space
   registries {{!RFC6890}} to indicate whether an IP address block is
   eligible to be in Locally-Served DNS Zones.  This change is meant to
   ensure consistent registrations between the above registries and
   future failures to make appropriate registrations in "IPv6 Locally-
   Served DNS Zone" such as in {{!RFC9637}}.






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   PLEASE REMOVE THE FOLLOWING PARAGRAPH BEFORE PUBLISHING: The source
   for this draft is maintained on GitHub at:
   https://github.com/moonshiner/draft-dnsop-rfc6303-bis
   (https://github.com/moonshiner/draft-dnsop-rfc6303-bis)

2.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.  DNS terminology is as described in
   [RFC8499].

3.  Updates to RFC 6063

   Please update {{Section 8 of @!RFC6303}} "IANA Considerations" as
   follows:

   OLD:

   {:quote}

   |  This registry can be amended through "IETF Review" as per
   |  {{?RFC5226}}.  As part of this review process, it should be noted
   |  that once a zone is added it is effectively added permanently;
   |  once an address range starts being configured as a local zone in
   |  systems on the Internet, it will be impossible to reverse those
   |  changes.

   NEW:

   {:quote}

   |  This registry can be amended through "Expert Review" policy
   |  ({{Section 4.5 of !RFC8126}}).  As part of this review process, it
   |  should be noted that once a zone is added it is effectively added
   |  permanently; once an address range starts being configured as a
   |  local zone in systems on the Internet, it will be impossible to
   |  reverse those changes.  More guidance for Designated Experts is
   |  provided in {{guidance}} of THIS_DOCUMENT.

3.1.  Guidance for Designated Experts

   In changing the approval to "Expert Review", there should be some
   additional guidance.  Here are some examples (not all mandatory) on
   what the Reviewer should look for:




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   1.  Should have at least an internet-draft written which can explain
       the usage.

   2.  The various Working Groups in the IETF should have

3.2.  Changes to the IPv6 Locally-Served DNS Zones Registry

   IANA is requested to add the zones listed below to the "IPv6 Locally-
   Served DNS Zone" registry:

   TBC with {{!RFC9637}} entries.

4.  Changes to the IP Special-Purpose Space Registries

4.1.  Eligible to Locally-Served DNS Zones New Column

   IANA is requested to add a new column, Eligible to Locally-Served DNS
   Zones, to the "IPv6 Special-Purpose Address Space" and "IPv4 Special-
   Purpose Address Space" registries.

4.2.  Eligible to Locally-Served DNS Zones Note

   IANA is requested to add the following note to the "IPv6 Special-
   Purpose Address Space" and "IPv4 Special-Purpose Address Space"
   registries:

   Eligible to Locally-Served DNS Zones:  A boolean value indicating
      whether the IP address block is to be added to the Locally-Served
      DNS Zones IANA registry.

4.3.  IPv6 Locally-Served DNS Zone Registry Note

   IANA is requested to add the following note to the "IPv6 Special-
   Purpose Address Space" registry:

   Note:  IANA has to add relevant entries for "Eligible to Locally-
      Served DNS Zones" set to "True" in the IPv6 Locally-Served DNS
      Zone Registry.

4.4.  IPv4 Locally-Served DNS Zone Registry Note

   IANA is requested to add the following note to the "IPv4 Special-
   Purpose Address Space" registry:

   Note:  IANA has to add relevant entries for "Eligible to Locally-
      Served DNS Zones" set to "True" in the IPv4 Locally-Served DNS
      Zone Registry.




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4.5.  Initial IPv6 Locally-Served DNS Zone Registry

   TBC.

4.6.  Initial IPv4 Locally-Served DNS Zone Registry

   TBC.

5.  Operational Considerations

   TBC.

6.  Security Considerations

   This document does not add new security risks other than those
   already discussed in {{RFC6303}}, {{!RFC6890}}, and {{!RFC9637}}.

7.  IANA Considerations

   Sections 6063-updates and 6890-updates include actions for IANA.
   These actions are not repeated here.

8.  References

8.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC6303]  Andrews, M., "Locally Served DNS Zones", BCP 163,
              RFC 6303, DOI 10.17487/RFC6303, July 2011,
              <https://www.rfc-editor.org/info/rfc6303>.

8.2.  Informative References

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

   [RFC8499]  Hoffman, P., Sullivan, A., and K. Fujiwara, "DNS
              Terminology", RFC 8499, DOI 10.17487/RFC8499, January
              2019, <https://www.rfc-editor.org/info/rfc8499>.







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Acknowledgements

Author's Address

   Tim Wicinski (editor)
   Elkins, WV 26241
   United States of America
   Email: tjw.ietf@gmail.com











































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