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Providing Minimal-Sized Responses to DNS Queries That Have QTYPE=ANY (RFC8482)

IP.com Disclosure Number: IPCOM000257031D
Original Publication Date: 2019-Jan-01
Included in the Prior Art Database: 2019-Feb-15
Document File: 10 page(s) / 24K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Abley: AUTHOR [+3]

Related Documents

10.17487/RFC8482: DOI

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 behavior of DNS servers or clients in this situation. This document aims to provide such guidance. This document updates RFCs 1034 and 1035.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 17% of the total text.

Internet Engineering Task Force (IETF) J. Abley Request for Comments: 8482 Afilias Updates: 1034, 1035 O. Gudmundsson Category: Standards Track M. Majkowski ISSN: 2070-1721 Cloudflare Inc. E. Hunt ISC January 2019

Providing Minimal-Sized Responses to DNS Queries That Have QTYPE=ANY

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 behavior of DNS servers or clients in this situation. This document aims to provide such guidance.

This document updates RFCs 1034 and 1035.

Status of This Memo

This is an Internet Standards Track document.

This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841.

Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at https://www.rfc-editor.org/info/rfc8482.

Abley, et al. Standards Track [Page 1]

RFC 8482 Minimal Responses for ANY Queries January 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 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 ....................................................3 1.1. Terminology ................................................3 2. Motivations for Use of ANY Queries ..............................3 3. General Approach ................................................4 4. Behavior of DNS Responders ......................................5 4.1. Answer with a Subset of Available RRsets ...................5 4.2. Answer with a Synthesized HINFO RRset ......................5 4.3. Answer with Best Guess as to Intention .....................6 4.4. Transport Considerations ...................................6 5. Behavior of DNS Initiators ......................................7 6. HINFO Considerations ............................................7 7. Updates to RFCs 1034 and 1035 ...................................7 8. Implementation Experience .......................................8 9. Security Considerations .....................

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