A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Domain Name System Operations WG of the IETF.
Title : Service binding and parameter specification via the
DNS (DNS SVCB and HTTPSSVC)
Authors : Ben Schwartz
Mike Bishop
Erik Nygren
Filename : draft-ietf-dnsop-svcb-httpssvc-02.txt
Pages : 36
Date : 2020-03-09
Abstract:
This document specifies the "SVCB" and "HTTPSSVC" DNS resource record
types to facilitate the lookup of information needed to make
connections for origin resources, such as for HTTPS URLs. SVCB
records allow an origin to be served from multiple network locations,
each with associated parameters (such as transport protocol
configuration and keying material for encrypting TLS SNI). They also
enable aliasing of apex domains, which is not possible with CNAME.
The HTTPSSVC DNS RR is a variation of SVCB for HTTPS and HTTP
origins. By providing more information to the client before it
attempts to establish a connection, these records offer potential
benefits to both performance and privacy.
TO BE REMOVED: This proposal is inspired by and based on recent DNS
usage proposals such as ALTSVC, ANAME, and ESNIKEYS (as well as long
standing desires to have SRV or a functional equivalent implemented
for HTTP). These proposals each provide an important function but
are potentially incompatible with each other, such as when an origin
is load-balanced across multiple hosting providers (multi-CDN).
Furthermore, these each add potential cases for adding additional
record lookups in-addition to AAAA/A lookups. This design attempts
to provide a unified framework that encompasses the key functionality
of these proposals, as well as providing some extensibility for
addressing similar future challenges.
TO BE REMOVED: The specific name for this RR type is an open topic
for discussion. "SVCB" and "HTTPSSVC" are meant as placeholders as
they are easy to replace. Other names might include "B", "SRV2",
"SVCHTTPS", "HTTPS", and "ALTSVC".
TO BE REMOVED: This document is being collaborated on in Github at:
https://github.com/MikeBishop/dns-alt-svc [1]. The most recent
working version of the document, open issues, etc. should all be
available there. The authors (gratefully) accept pull requests.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dnsop-svcb-httpssvc/
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dnsop-svcb-httpssvc-02
https://datatracker.ietf.org/doc/html/draft-ietf-dnsop-svcb-httpssvc-02
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-dnsop-svcb-httpssvc-02
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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