A Bootstrapping Procedure to Discover and Authenticate DNS-over-(D)TLS and DNS-over-HTTPS Servers
draft-reddy-dprive-bootstrap-dns-server-04
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DPRIVE WG T. Reddy
Internet-Draft McAfee
Intended status: Standards Track D. Wing
Expires: December 16, 2019 Citrix
M. Richardson
Sandelman Software Works
M. Boucadair
Orange
June 14, 2019
A Bootstrapping Procedure to Discover and Authenticate DNS-over-(D)TLS
and DNS-over-HTTPS Servers
draft-reddy-dprive-bootstrap-dns-server-04
Abstract
This document specifies mechanisms to automatically bootstrap
endpoints (e.g., hosts, Customer Equipment) to discover and
authenticate DNS-over-(D)TLS and DNS-over-HTTPS servers provided by a
local network.
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 December 16, 2019.
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
Reddy, et al. Expires December 16, 2019 [Page 1]
Internet-Draft DoT/DoH server discovery June 2019
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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. Bootstrapping Endpoint Devices . . . . . . . . . . . . . . . 5
5. Bootstrapping IoT Devices . . . . . . . . . . . . . . . . . . 7
6. DNS-over-(D)TLS and DNS-over-HTTPS Server Discovery Procedure 8
7. Connection Handshake and Service Invocation . . . . . . . . . 10
8. EST Service Discovery Procedure . . . . . . . . . . . . . . . 10
8.1. mDNS . . . . . . . . . . . . . . . . . . . . . . . . . . 10
9. Network Reattachment . . . . . . . . . . . . . . . . . . . . 11
10. Privacy Considerations . . . . . . . . . . . . . . . . . . . 12
10.1. Privacy Extension Format . . . . . . . . . . . . . . . . 12
10.2. Privacy Extension Syntax . . . . . . . . . . . . . . . . 14
11. Security Considerations . . . . . . . . . . . . . . . . . . . 15
12. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 16
12.1. Application Service & Application Protocol Tags . . . . 16
12.1.1. DNS Application Service Tag Registration . . . . . . 17
12.1.2. dns.tls Application Protocol Tag Registration . . . 17
12.1.3. dns.dtls Application Protocol Tag Registration . . . 17
12.1.4. dns.https Application Protocol Tag Registration . . 17
13. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 17
14. References . . . . . . . . . . . . . . . . . . . . . . . . . 18
14.1. Normative References . . . . . . . . . . . . . . . . . . 18
14.2. Informative References . . . . . . . . . . . . . . . . . 19
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 21
1. Introduction
Traditionally a caching DNS server has been provided by local
networks. This provides benefits such as low latency to reach that
DNS server (owing to its network proximity to the endpoint).
However, if an endpoint is configured to use Internet-hosted or
public DNS-over-(D)TLS [RFC7858] [RFC8094] or DNS-over-HTTPS
[RFC8484] servers, any available local DNS server cannot serve DNS
requests from local endpoints. If public DNS servers are used
instead of using local DNS servers, some operational problems can
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