DNS Privacy Requirements for Exchanges between Recursive Resolvers and Authoritative Servers
draft-lmo-dprive-phase2-requirements-00
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DPRIVE J. Livingood
Internet-Draft Comcast
Intended status: Informational A. Mayrhofer
Expires: April 30, 2020 nic.at GmbH
B. Overeinder
NLnetLabs
October 28, 2019
DNS Privacy Requirements for Exchanges between Recursive Resolvers and
Authoritative Servers
draft-lmo-dprive-phase2-requirements-00
Abstract
This document provides requirements for adding confidentiality to DNS
exchanges between recursive resolvers and authoritative servers.
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
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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 April 30, 2020.
Copyright Notice
Copyright (c) 2019 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
Livingood, et al. Expires April 30, 2020 [Page 1]
Internet-Draft DPRIVE Phase 2 Requirements October 2019
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction & Scope . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Threat Model and Problem Statement . . . . . . . . . . . . . 3
4. Core Requirements . . . . . . . . . . . . . . . . . . . . . . 4
4.1. Prioritization of Requirements . . . . . . . . . . . . . 5
4.2. Opportunistic Upgrade to Encryption . . . . . . . . . . . 5
4.3. Detection of Availability . . . . . . . . . . . . . . . . 5
4.4. Resistance to Downgrade Attack . . . . . . . . . . . . . 6
4.5. End-User Policy Propagation . . . . . . . . . . . . . . . 6
5. Perspectives and Use Cases . . . . . . . . . . . . . . . . . 7
5.1. The User Perspective and Use Cases . . . . . . . . . . . 8
5.2. The Operator Perspective and Use Cases . . . . . . . . . 8
5.3. The Implementor / Software Vendor Perspective and Use
Cases . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.4. Performance and Efficiency . . . . . . . . . . . . . . . 10
6. Security Considerations . . . . . . . . . . . . . . . . . . . 11
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
8. Changelog . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8.1. lmo-dprive-phase2-requirements-00 . . . . . . . . . . . . 11
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 11
9.1. Normative References . . . . . . . . . . . . . . . . . . 11
9.2. Informative References . . . . . . . . . . . . . . . . . 11
9.3. URIs . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 12
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
1. Introduction & Scope
The 2018 approved charter of the IETF DPRIVE Working Group [1]
contains milestones related to confidentiality aspects of DNS
transactions between the iterative resolver and authoritative name
servers.
This is also reflected in the DPRIVE milestones [2], which (as of
October 2019) contains two relevant milestones:
Develop requirements for adding confidentiality to DNS exchanges
between recursive resolvers and authoritative servers (unpublished
document).
Investigate potential solutions for adding confidentiality to DNS
exchanges involving authoritative servers (Experimental).
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