Domain Name System Operations P. Hoffman Internet-Draft ICANN Updates: 2181 (if approved) S. Huque Intended status: Standards Track Salesforce Expires: 5 September 2024 W. Toorop NLnet Labs 4 March 2024 Ranking Domain Name System data draft-toorop-dnsop-ranking-dns-data-00 Abstract This document extends the list ranking the trustworthiness of domain name system (DNS) data (see Section 5.4.1 of [RFC2181]). The list is extended with entries for root server names and addresses built-in resolvers, and provided via a root hints file with the lowest trustworthiness, as wel as an entry for data which is verifiable DNSSEC secure with the highest trustworthiness. This document furthermore assigns ranked values to the positions of the list for easier reference and comparison of trustworthiness of DNS data. About This Document This note is to be removed before publishing as an RFC. Status information for this document may be found at https://datatracker.ietf.org/doc/draft-toorop-dnsop-ranking-dns- data/. Discussion of this document takes place on the DNSOP Working Group mailing list (mailto:dnsop@ietf.org), which is archived at https://mailarchive.ietf.org/arch/browse/dnsop/. Subscribe at https://www.ietf.org/mailman/listinfo/dnsop/. Source for this draft and an issue tracker can be found at https://github.com/NLnetLabs/draft-toorop-dnsop-ranking-dns-data. 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/. Hoffman, et al. Expires 5 September 2024 [Page 1] Internet-Draft Ranking DNS data March 2024 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 5 September 2024. Copyright Notice Copyright (c) 2024 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 Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Trustworthiness values . . . . . . . . . . . . . . . . . . . 2 3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3 4. Security Considerations . . . . . . . . . . . . . . . . . . . 3 5. Normative References . . . . . . . . . . . . . . . . . . . . 3 Appendix A. Acknowledgements . . . . . . . . . . . . . . . . . . 4 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4 1. Introduction This draft's intention is currently just to start re-evaluation and re-thinking of [RFC2181], Section 5.4.1 about ranking trustworthiness of DNS data. 2. Trustworthiness values +=======+===========================================================+ | Value | Data | +=======+===========================================================+ | AAA | Data from a primary zone file other than | | | occluded data, and all data that is verifiable | | | DNSSEC secure regardless off were it came from | +-------+-----------------------------------------------------------+ | AA | Data from a zone transfer other than occluded | | | data | Hoffman, et al. Expires 5 September 2024 [Page 2] Internet-Draft Ranking DNS data March 2024 +-------+-----------------------------------------------------------+ | A | The authoritative data included in the answer | | | section of an authoritative reply | +-------+-----------------------------------------------------------+ | A- | Data from the authority section of an | | | authoritative answer | +-------+-----------------------------------------------------------+ | BBB | Occluded data from a primary zone, or occluded | | | data from a zone transfer | +-------+-----------------------------------------------------------+ | BB | Data from the answer section of a non- | | | authoritative answer, and non-authoritative data | | | from the answer section of authoritative answers | +-------+-----------------------------------------------------------+ | B | Additional information from an authoritative | | | answer, Data from the authority section of a | | | non-authoritative answer, Additional information | | | from non-authoritative answers. | +-------+-----------------------------------------------------------+ | CCC | Names and addresses for the root servers from a | | | hints file | +-------+-----------------------------------------------------------+ | CC | Names and addresses for the root servers built | | | into resolver software | +-------+-----------------------------------------------------------+ Table 1 3. IANA Considerations This document does not require any IANA actions. 4. Security Considerations The process of replacing RRsets in a resolvers cache with the RRsets with a higher trustworthiness ranking, either passively or pro- actively by explicit querying, is crucial to the security of the DNS. 5. Normative References [RFC2181] Elz, R. and R. Bush, "Clarifications to the DNS Specification", RFC 2181, DOI 10.17487/RFC2181, July 1997, . Hoffman, et al. Expires 5 September 2024 [Page 3] Internet-Draft Ranking DNS data March 2024 Appendix A. Acknowledgements Thanks to all the people that contributed to the discussion surrounding the re-evaluation of how the trustworthiness of DNS data should be ranked. Authors' Addresses Paul Hoffman ICANN Email: paul.hoffman@icann.org Shumon Huque Salesforce Email: shuque@gmail.com Willem Toorop NLnet Labs Science Park 400 1098 XH Amsterdam Netherlands Email: willem@nlnetlabs.nl Hoffman, et al. Expires 5 September 2024 [Page 4]