dnssec-name-and-shame.com DNSSEC Outage:
2017-09-14 to 2017-09-18

Updated: September 18, 2017

Overview

This page gives some details on the dnssec-name-and-shame.com DNSSEC outage from September 14 to September 18, 2017. This is not their first DNSSEC outage.

Timeline / DNSViz

DNSSEC Debugger

Unlike DNSViz, Verisign's DNSSEC Debugger doesn't archive results, so here's a screenshot of my web browser's output from September 16, 2017:

September 16, 2017 dnssec-name-and-shame.com DNSSEC outage

drill trace

Since DNSSEC contains so much garbage, I put the complete drill trace into its own file, with the relevant portion below (emphasis added):

;; Domain: dnssec-name-and-shame.com.
[T] dnssec-name-and-shame.com. 3600 IN DNSKEY 257 3 7 ;{id = 52335 (ksk), size = 2048b}
dnssec-name-and-shame.com. 3600 IN DNSKEY 257 3 7 ;{id = 11841 (ksk), size = 2048b}
dnssec-name-and-shame.com. 3600 IN DNSKEY 256 3 7 ;{id = 46764 (zsk), size = 1024b}
[B] dnssec-name-and-shame.com. 3600 IN A 185.49.141.38
;; Error: DNSSEC signature has expired

dnscheck

Note: dnscheck requires javascript.

Zonemaster

Google Public DNS: with and without DNSSEC

DNSSEC can be disabled in queries via the CD (checking disabled) bit. Let's compare DNS queries with and without DNSSEC.

With DNSSEC, DNS queries fail:

$ dig +dnssec dnssec-name-and-shame.com. @8.8.8.8

; <<>> DiG 9.4.2-P2 <<>> +dnssec dnssec-name-and-shame.com. @8.8.8.8
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 40247
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 512
;; QUESTION SECTION:
;dnssec-name-and-shame.com. IN A

;; Query time: 453 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Thu Sep 14 14:10:49 2017
;; MSG SIZE rcvd: 54


You have to disable DNSSEC to make DNS queries work:

$ dig +cd dnssec-name-and-shame.com. @8.8.8.8

; <<>> DiG 9.4.2-P2 <<>> +cd dnssec-name-and-shame.com. @8.8.8.8
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45591
;; flags: qr rd ra cd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;dnssec-name-and-shame.com. IN A

;; ANSWER SECTION:
dnssec-name-and-shame.com. 3599 IN A 185.49.141.38

;; Query time: 290 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Thu Sep 14 14:10:49 2017
;; MSG SIZE rcvd: 59

Logfile examples