1. DNS/RFC/8020

/awsdns   /microsoft  

Contents

  1. DNS/RFC/8020
    1. DJB
    2. horror
    3. deep subdomains

DNS/NXDOMAIN DNS/qname-minimisation

NXDOMAIN: There Really Is Nothing Underneath https://tools.ietf.org/html/rfc8020 

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.

NXDOMAIN返答の原点回帰 

AWS DNS services break qname minimization (amazon.com)

https://news.ycombinator.com/item?id=15893103 

RFC8020 is an example of the DNS WG making backwards incompatible changes. The "NXDOMAIN" for an empty non-terminal has long been the behavior in DJB's TinyDNS.

$ dig -t ns msa.trafficmanager.net @tm1.dns-tm.com.

https://forums.aws.amazon.com/thread.jspa?threadID=260905

/awsdns

1.1. DJB

https://mailarchive.ietf.org/arch/msg/dnsext/SdFZivW0H9aL64dQNCKrHV5fE5A/

1.2. horror

https://iepg.org/2017-03-27-ietf98/Horrors%20of%20DNS.pdf

akamai ? は8020を守る: https://community.akamai.com/customers/s/article/CloudSecurityDNSFlagDayandAkamai20190115151216?language=en_US

https://powerdns.org/hello-dns/basic.md.html#that'sitforbasicdns!/furtherreading/rfc8020:nxdomain:therereallyisnothingunderneath

1.3. deep subdomains

How to check for the existence of deep subdomains even if the intermediate ones don't exist?

https://serverfault.com/questions/1048157/how-to-check-for-the-existence-of-deep-subdomains-even-if-the-intermediate-ones

MoinQ: DNS/RFC/8020 (last edited 2021-09-25 00:48:14 by ToshinoriMaeno)