Nameservers for the Address and Routing Parameter Area ("arpa") Domain
The information below is for an old version of the document.
This is an older version of an Internet-Draft that was ultimately published as RFC 9120.
|Authors||Kim Davies , Jari Arkko|
|Last updated||2021-05-06 (Latest revision 2021-04-26)|
|RFC stream||Internet Architecture Board (IAB)|
|Stream||IAB state||Community Review|
|RFC Editor Note||(None)|
Network Working Group K. Davies Internet-Draft IANA Updates: RFC3172 (if approved) J. Arkko Intended status: Informational Ericsson Expires: October 25, 2021 April 23, 2021 Nameservers for the Address and Routing Parameter Area ("arpa") Domain draft-iab-arpa-authoritative-servers-00 Abstract This document describes revisions to operational practices to separate function of the "arpa" top-level domain in the DNS from its historical operation alongside the DNS root zone. 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 October 25, 2021. Copyright Notice Copyright (c) 2021 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. Davies & Arkko Expires October 25, 2021 [Page 1] Internet-Draft Nameservers for the .arpa Domain April 2021 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Requirements for the "arpa" zone . . . . . . . . . . . . . . 3 3. Transition Process . . . . . . . . . . . . . . . . . . . . . 3 3.1. Dedicated nameserver hostnames . . . . . . . . . . . . . 3 3.2. Separation of infrastructure . . . . . . . . . . . . . . 4 3.3. Zone administration . . . . . . . . . . . . . . . . . . . 4 3.4. Conclusion of process . . . . . . . . . . . . . . . . . . 4 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5 5. Security Considerations . . . . . . . . . . . . . . . . . . . 5 6. References . . . . . . . . . . . . . . . . . . . . . . . . . 5 6.1. Normative References . . . . . . . . . . . . . . . . . . 5 6.2. Informative References . . . . . . . . . . . . . . . . . 5 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 6 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6 1. Introduction The "arpa" top-level domain [RFC3172] is designated as an "infrastructure domain" to support techniques defined by Internet standards. Zones under the "arpa" domain provide various mappings, such as IP addresses to domain names and E.164 numbers to URIs. It also contains special use names such as "home", which is a non-unique name used in residential networks. Historically, the "arpa" zone has been hosted on almost all of the root name servers, and [RFC3172] envisages the "arpa" domain to be "sufficiently critical that the operational requirements for the root servers apply to the operational requirements of the "arpa" servers". To date, this has been implemented by serving the "arpa" domain directly on a subset of the root server infrastructure. This bundling of root server and "arpa" server operations has entwined management of the zones contents and their infrastructure. As a result, some proposals under consideration by the IETF involving the "arpa" zone have been discarded due to the risk of conflict with root operations. The separation described in this document resolves operational impacts of synchronizing edits to the root zone and the "arpa" zone by eliminating the current dependency and allowing more tailored operations based on the unique requirements of each zone. Davies & Arkko Expires October 25, 2021 [Page 2] Internet-Draft Nameservers for the .arpa Domain April 2021 2. Requirements for the "arpa" zone The "arpa" domain continues to play a role in critical Internet operations, and this change does not propose weakening operational requirements described in [RFC3172] for the domain. Future operational requirements for the "arpa" domain are encouraged to follow strong baseline requirements such as those documented in [RFC7720]. Changes to the administration of the "arpa" zone do not alter the management practices of other zones delegated within the "arpa" namespace. For example, "ip6.arpa" would continue to be managed in accordance with [RFC5855]. 3. Transition Process The process will dedicate new hostnames to the servers authoritative for the "arpa" zone, but will initially serve the "arpa" zone from the same hosts. Once completed, subsequent transitional phases could include using new hosts to replace or augment the existing root server hosts, and separation of the editing and distribution of the "arpa" zone from necessarily being connected to the root zone. Any future management considerations regarding how such changes may be performed are beyond the scope of this document. 3.1. Dedicated nameserver hostnames Consistent with the use of the "arpa" namespace itself to host name servers for other delegations in the "arpa" zone ([RFC5855]), this document specifies a new namespace of "ns.arpa", with the nameserver set for the "arpa" zone to be labelled as follows: a.ns.arpa b.ns.arpa c.ns.arpa ... Dedicated hostnames eliminate a logical dependency that requires the coordinated editing of the nameservers for the "arpa" zone and the root zone. This component of this transition does not require the underlying hosts that provide "arpa" name service (that is, the root servers) be altered. The "arpa" zone will initially map the new hostnames to the same IP addresses that already provide service under the respective hostnames within root-servers.net. Davies & Arkko Expires October 25, 2021 [Page 3] Internet-Draft Nameservers for the .arpa Domain April 2021 Because these nameservers are completely in-bailiwick of the "arpa" zone, they will require glue records in the root zone. This is consistent with current practice and requires no operational changes to the root zone. 3.2. Separation of infrastructure After initially migrating the "arpa" zone to use hostnames that are not shared with the root zone, the underlying name service is expected to evolve such that it no longer directly aligns to a subset of root server instances. With no shared infrastructure between the root servers and the "arpa" servers, future novel applications for the "arpa" zone may be possible. Any subsequent changes to the parties providing name service for the zone is considered a normal management responsibility, and would be performed in accordance with [RFC3172]. 3.3. Zone administration Publication of the "arpa" zone file to the authoritative "arpa" name servers is currently undertaken alongside the root zone maintenance functions. Upon the separation of the "arpa" infrastructure from the root server infrastructure, publication of the "arpa" zone no longer necessarily needs to be technically linked or inter-related to the root zone publication mechanisms. 3.4. Conclusion of process Full technical separation of "arpa" operations from root operations minimally requires the following to be satisfied: o The "arpa" zone no longer shares any hostnames in its NS-set with the root zone; o The hosts that provide authoritative name service are not the same hosts as the root servers, do not share any IPv4 or IPv6 addresses with the root servers, and are sufficiently separately provisioned such that any unique "arpa" zone requirements can be deployed without affecting how root zone service is provided; o The editorial and publication process for the "arpa" zone has any common dependencies with the root zone process removed, so that the "arpa" zone can be managed, edited and provisioned wholly independently of the root zone. Such separation is ultimately sought to allow for novel uses of the "arpa" zone without the risk of inadvertantly impacting root zone and Davies & Arkko Expires October 25, 2021 [Page 4] Internet-Draft Nameservers for the .arpa Domain April 2021 root server operations. It is recognized that achieving this state requires a deliberative process involving significant coordination to ensure impacts are minimized. 4. IANA Considerations The IANA shall coordinate the creation of the "ns.arpa" namespace and populate it with address records that reflect the IP addresses of the contemporary root servers documented within "root-servers.net" as its initial state. The IANA will initially migrate the 12 NS records for the "arpa" zone to point to their respective new entries in the "ns.arpa" domain. Subsequently, the IAB and IANA will consult and coordinate with all relevant parties on activity to reduce or eliminate reliance upon root zone and root server infrastructure for serving the "arpa" zone. Such changes will be performed in compliance with [RFC3172] and shall be conducted with all due care and deliberation to mitigate potential impacts on critical infrastructure. 5. Security Considerations The security of the "arpa" zone is not necessarily impacted by any aspects of these changes. Robust practices associated with administering the content of the zone (including signing operations) as well as its distribution will continue to be necessary. 6. References 6.1. Normative References [RFC3172] Huston, G., Ed., "Management Guidelines & Operational Requirements for the Address and Routing Parameter Area Domain ("arpa")", BCP 52, RFC 3172, DOI 10.17487/RFC3172, September 2001, <https://www.rfc-editor.org/info/rfc3172>. 6.2. Informative References [RFC5855] Abley, J. and T. Manderson, "Nameservers for IPv4 and IPv6 Reverse Zones", BCP 155, RFC 5855, DOI 10.17487/RFC5855, May 2010, <https://www.rfc-editor.org/info/rfc5855>. [RFC7720] Blanchet, M. and L-J. Liman, "DNS Root Name Service Protocol and Deployment Requirements", BCP 40, RFC 7720, DOI 10.17487/RFC7720, December 2015, <https://www.rfc-editor.org/info/rfc7720>. Davies & Arkko Expires October 25, 2021 [Page 5] Internet-Draft Nameservers for the .arpa Domain April 2021 Acknowledgments Thank you Alyssa Cooper, Michelle Cotton, Lars-Johan Liman, Wes Hardaker, Ted Hardie, Paul Hoffman, Russ Housley, Oscar Robles-Garay, Duane Wessels and Suzanne Woolf for providing review and feedback. Authors' Addresses Kim Davies Internet Assigned Numbers Authority PTI/ICANN 12025 Waterfront Drive Los Angeles 90094 United States of America Email: email@example.com Jari Arkko Ericsson Research 02700 Kauniainen Finland Email: firstname.lastname@example.org Davies & Arkko Expires October 25, 2021 [Page 6]