draft-ietf-dnsop-no-response-issue-11.txt   draft-ietf-dnsop-no-response-issue-12.txt 
Network Working Group M. Andrews Network Working Group M. Andrews
Internet-Draft R. Bellis Internet-Draft R. Bellis
Intended status: Best Current Practice ISC Intended status: Best Current Practice ISC
Expires: January 28, 2019 July 27, 2018 Expires: May 8, 2019 November 4, 2018
A Common Operational Problem in DNS Servers - Failure To Respond. A Common Operational Problem in DNS Servers - Failure To Respond.
draft-ietf-dnsop-no-response-issue-11 draft-ietf-dnsop-no-response-issue-12
Abstract Abstract
The DNS is a query / response protocol. Failing to respond to The DNS is a query / response protocol. Failing to respond to
queries, or responding incorrectly, causes both immediate operational queries, or responding incorrectly, causes both immediate operational
problems and long term problems with protocol development. problems and long term problems with protocol development.
This document identifies a number of common kinds of queries to which This document identifies a number of common kinds of queries to which
some servers either fail to respond or else respond incorrectly. some servers either fail to respond or else respond incorrectly.
This document also suggests procedures for TLD and other zone This document also suggests procedures for TLD and other zone
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/. Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on January 28, 2019. This Internet-Draft will expire on May 8, 2019.
Copyright Notice Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the Copyright (c) 2018 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of (https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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supported): supported):
dig +nocookie +edns=1 +noednsneg +noad +norec +ednsopt=100 soa \ dig +nocookie +edns=1 +noednsneg +noad +norec +ednsopt=100 soa \
$zone @$server $zone @$server
expect: status: BADVERS expect: status: BADVERS
expect: SOA record to NOT be present expect: SOA record to NOT be present
expect: an OPT record to be present in the additional section expect: an OPT record to be present in the additional section
expect: OPT=100 to NOT be present expect: OPT=100 to NOT be present
expect: EDNS Version 0 in response expect: EDNS Version 0 in response
expect: flag: aa to be present expect: flag: aa to NOT be present
expect: flag: ad to NOT be present expect: flag: ad to NOT be present
8.2.7. Testing Truncated Responses 8.2.7. Testing Truncated Responses
Ask for the DNSKEY records of the configured zone, which must be a Ask for the DNSKEY records of the configured zone, which must be a
DNSSEC signed zone. This query is made with no DNS flag bits set. DNSSEC signed zone. This query is made with no DNS flag bits set.
EDNS version 0 is used without any EDNS options. The only EDNS flag EDNS version 0 is used without any EDNS options. The only EDNS flag
set is DO. The EDNS UDP buffer size is set to 512. The intention of set is DO. The EDNS UDP buffer size is set to 512. The intention of
this query is to elicit a truncated response from the server. Most this query is to elicit a truncated response from the server. Most
signed DNSKEY responses are bigger than 512 bytes. This test will signed DNSKEY responses are bigger than 512 bytes. This test will
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