.mg TLD DNSSEC Outage: 2017-06-23

Updated: June 23, 2017

Overview

This page gives some details on the .mg (Madagascar) TLD DNSSEC outage on June 23, 2017.

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 June 23, 2017:

June 23, 2017 .mg TLD DNSSEC outage

Zonemaster

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: mg.
[B] mg. 3600 IN DNSKEY 257 3 5 ;{id = 64652 (ksk), size = 2048b}
mg. 3600 IN DNSKEY 256 3 5 ;{id = 44863 (zsk), size = 1024b}
[B] Error verifying denial of existence for mg. type A: No keys with the keytag and algorithm from the RRSIG found
;;[S] self sig OK; [B] bogus; [T] trusted

OpenDNS & Google Public DNS

OpenDNS does not support DNSSEC, and instead supports DNSCurve. Google Public DNS currently supports only DNSSEC, and thus, Google's users saw SERVFAIL for queries under mg during this outage.

With OpenDNS, without DNSSEC, queries succeed:

; <<>> DiG 9.4.2-P2 <<>> mg. @resolver1.opendns.com.
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27514
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;mg. IN A

;; AUTHORITY SECTION:
mg. 3600 IN SOA ns.nic.mg. ramboa.nic.mg. 2017062304 21600 3600 604800 3600

;; Query time: 180 msec
;; SERVER: 208.67.222.222#53(208.67.222.222)
;; WHEN: Fri Jun 23 02:53:34 2017
;; MSG SIZE rcvd: 78

With Google Public DNS, because of DNSSEC, queries fail:

; <<>> DiG 9.4.2-P2 <<>> +dnssec mg. @8.8.8.8
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 385
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 512
;; QUESTION SECTION:
;mg. IN A

;; Query time: 418 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Fri Jun 23 02:53:35 2017
;; MSG SIZE rcvd: 31

Logfile examples