Providing Minimal-Sized Responses to DNS Queries that have QTYPE=ANY
draft-ietf-dnsop-refuse-any-04

Document Type Active Internet-Draft (dnsop WG)
Last updated 2017-03-16 (latest revision 2017-02-08)
Replaces draft-dnsop-refuse-any
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Network Working Group                                           J. Abley
Internet-Draft                                                 Dyn, Inc.
Updates: 1035 (if approved)                               O. Gudmundsson
Intended status: Standards Track                            M. Majkowski
Expires: August 12, 2017                                 Cloudflare Inc.
                                                       February 08, 2017

  Providing Minimal-Sized Responses to DNS Queries that have QTYPE=ANY
                     draft-ietf-dnsop-refuse-any-04

Abstract

   The Domain Name System (DNS) specifies a query type (QTYPE) "ANY".
   The operator of an authoritative DNS server might choose not to
   respond to such queries for reasons of local policy, motivated by
   security, performance or other reasons.

   The DNS specification does not include specific guidance for the
   behaviour of DNS servers or clients in this situation.  This document
   aims to provide such guidance.

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
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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on August 12, 2017.

Copyright Notice

   Copyright (c) 2017 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Abley, et al.            Expires August 12, 2017                [Page 1]
Internet-Draft      Minimal Responses for ANY Queries      February 2017

   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
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Motivations . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  General Approach  . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Behaviour of DNS Responders . . . . . . . . . . . . . . . . .   4
     4.1.  Select one RRSet mode . . . . . . . . . . . . . . . . . .   4
     4.2.  Synthesised HINFO RRset . . . . . . . . . . . . . . . . .   5
     4.3.  Guess intention . . . . . . . . . . . . . . . . . . . . .   5
     4.4.  Responding to queries over TCP  . . . . . . . . . . . . .   5
   5.  Behaviour of DNS Initiators . . . . . . . . . . . . . . . . .   6
   6.  HINFO Considerations  . . . . . . . . . . . . . . . . . . . .   6
   7.  Updates to RFC 1035 . . . . . . . . . . . . . . . . . . . . .   6
   8.  Implementation Experience . . . . . . . . . . . . . . . . . .   7
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   11. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     12.1.  Normative References . . . . . . . . . . . . . . . . . .   8
     12.2.  Informative References . . . . . . . . . . . . . . . . .   8
     12.3.  URIs . . . . . . . . . . . . . . . . . . . . . . . . . .   8
   Appendix A.  Editorial Notes  . . . . . . . . . . . . . . . . . .   8
     A.1.  Change History  . . . . . . . . . . . . . . . . . . . . .   8
       A.1.1.  draft-ietf-dnsop-refuse-any-04  . . . . . . . . . . .   8
       A.1.2.  draft-ietf-dnsop-refuse-any-03  . . . . . . . . . . .   9
       A.1.3.  draft-ietf-dnsop-refuse-any-02  . . . . . . . . . . .   9
       A.1.4.  draft-ietf-dnsop-refuse-any-01  . . . . . . . . . . .   9
       A.1.5.  draft-ietf-dnsop-refuse-any-00  . . . . . . . . . . .   9
       A.1.6.  draft-jabley-dnsop-refuse-any-01  . . . . . . . . . .   9
       A.1.7.  draft-jabley-dnsop-refuse-any-00  . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   The Domain Name System (DNS) specifies a query type (QTYPE) "ANY".
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