Subject: [DNSOP] Fwd: New Version Notification for draft-dwmtwc-dnsop-caching-resolution-failures-00.txt

From: "Wessels, Duane" <[email-masked]>
Date: Fri, 14 Jan 2022 18:14:55 +0000

Dear DNSOP,

In light of some recent events and research, we feel that it could be beneficial to strengthen the requirements around negative caching of DNS resolution failures. Please see the recently submitted Internet Draft referenced below and let us know if you have any feedback.

DW

Begin forwarded message:

From: <[email-masked]<mailto:[email-masked]>>
Subject: [EXTERNAL] New Version Notification for draft-dwmtwc-dnsop-caching-resolution-failures-00.txt
Date: January 13, 2022 at 1:28:00 PM PST
To: Duane Wessels <[email-masked]<mailto:[email-masked]>>, Matthew Thomas <[email-masked]<mailto:[email-masked]>>, William Carroll <[email-masked]<mailto:[email-masked]>>

A new version of I-D, draft-dwmtwc-dnsop-caching-resolution-failures-00.txt
has been successfully submitted by William Carroll and posted to the
IETF repository.

Name: draft-dwmtwc-dnsop-caching-resolution-failures
Revision: 00
Title: Negative Caching of DNS Resolution Failures
Document date: 2022-01-13
Group: Individual Submission
Pages: 13
URL:            https://www.ietf.org/archive/id/draft-dwmtwc-dnsop-caching-resolution-failures-00.txt
Status:         https://datatracker.ietf.org/doc/draft-dwmtwc-dnsop-caching-resolution-failures/
Htmlized:       https://datatracker.ietf.org/doc/html/draft-dwmtwc-dnsop-caching-resolution-failures

Abstract:
  In the DNS, resolvers employ caching to reduce both latency for end
  users and load on authoritative name servers.  The process of
  resolution may result in one of three types of responses: (1) a
  response containing the requested data; (2) a response indicating the
  requested data does not exist; or (3) a non-response due to a
  resolution failure in which the resolver does not receive any useful
  information regarding the data's existence.  This document concerns
  itself only with the third type.

  RFC 2308 specifies requirements for DNS negative caching.  There,
  caching of type (1) and (2) responses is mandatory and caching of
  type (3) responses is optional.  This document updates RFC 2308 to
  require negative caching for DNS resolution failures.

The IETF Secretariat