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NXDOMAIN: There Really Is Nothing Underneath (RFC8020)

IP.com Disclosure Number: IPCOM000248209D
Original Publication Date: 2016-Nov-01
Included in the Prior Art Database: 2016-Nov-09
Document File: 20 page(s) / 22K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

S. Bortzmeyer: AUTHOR [+2]

Abstract

The DNS protocol [RFC1035] defines response code 3 as "Name Error", or "NXDOMAIN" [RFC2308], which means that the queried domain name does not exist in the DNS. Since domain names are represented as a tree of labels ([RFC1034], Section 3.1), nonexistence of a node implies nonexistence of the entire subtree rooted at this node.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 12% of the total text.

Internet Engineering Task Force (IETF)                     S. Bortzmeyer Request for Comments: 8020                                         AFNIC Updates: 1034, 2308                                             S. Huque Category: Standards Track                                  Verisign Labs ISSN: 2070-1721                                            November 2016

               NXDOMAIN: There Really Is Nothing Underneath

Abstract

   This document states clearly that when a DNS resolver receives a    response with a response code of NXDOMAIN, it means that the domain    name which is thus denied AND ALL THE NAMES UNDER IT do not exist.

   This document clarifies RFC 1034 and modifies a portion of RFC 2308:    it updates both of them.

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    http://www.rfc-editor.org/info/rfc8020.

Copyright Notice

   Copyright (c) 2016 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    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.

Bortzmeyer & Huque           Standards Track                    [Page 1]
 RFC 8020                      NXDOMAIN Cut                 November 2016

 Table of Contents

   1. Introduction and Background .....................................2

      1.1. Terminology ................................................3

   2. Rules ...........................................................3

   3. Updates to RFCs .................................................5

      3.1. Updates to RFC 1034 ........................................5

      3.2. Updates to RFC 2308 ........................................5

   4. Benefits .......