A new Request for Comments is now available in online RFC libraries.
RFC 8020
Title: NXDOMAIN: There Really Is Nothing
Underneath
Author: S. Bortzmeyer, S. Huque
Status: Standards Track
Stream: IETF
Date: November 2016
Mailbox: bortzmeyer+ietf@nic.fr,
shuque@verisign.com
Pages: 10
Characters: 22301
Updates: RFC 1034, RFC 2308
I-D Tag: draft-ietf-dnsop-nxdomain-cut-05.txt
URL: https://www.rfc-editor.org/info/rfc8020
DOI: http://dx.doi.org/10.17487/RFC8020
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.
This document is a product of the Domain Name System Operations Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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