.xn--wgbh1c TLD DNSSEC Outage: 2020-06-17 to 2020-06-25

Updated: June 27, 2020

Overview

This page gives some details on the .xn--wgbh1c (IDN TLD) DNSSEC outage from June 17 to June 25, 2020.

Timeline / DNSViz

archive.org provideded this archived snapshot of the DNSSEC outage, in case DNSViz fails, which it regularly does. There is also an archive courtesy of archive.is.

DNSSEC Debugger

Here's a screenshot of my web browser's output from June 18, 2020:

June 18, 2020 .xn--wgbh1c (IDN TLD) DNSSEC outage

Google 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.

$ dig +dnssec ns xn--wgbh1c. @8.8.8.8

; <<>> dig 9.10.8-P1 <<>> +dnssec ns xn--wgbh1c. @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 15612
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 512
;; QUESTION SECTION:
;xn--wgbh1c. IN NS

;; Query time: 395 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Wed Jun 17 10:17:39 UTC 2020
;; MSG SIZE rcvd: 39

You have to disable DNSSEC to make DNS queries work:

$ dig +cd ns xn--wgbh1c. @8.8.8.8

; <<>> dig 9.10.8-P1 <<>> +cd ns xn--wgbh1c. @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21916
;; flags: qr rd ra cd; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;xn--wgbh1c. IN NS

;; ANSWER SECTION:
xn--wgbh1c. 3599 IN NS ns1.dotmasr.eg.
xn--wgbh1c. 3599 IN NS ns2.dotmasr.eg.
xn--wgbh1c. 3599 IN NS ns3.dotmasr.eg.
xn--wgbh1c. 3599 IN NS ns4.dotmasr.eg.

;; Query time: 220 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Wed Jun 17 10:17:40 UTC 2020
;; MSG SIZE rcvd: 121

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: xn--wgbh1c.
[B] xn--wgbh1c. 3600 IN DNSKEY 256 3 8 ;{id = 62163 (zsk), size = 1024b}
xn--wgbh1c. 3600 IN DNSKEY 257 3 8 ;{id = 19912 (ksk), size = 2048b}
[B] Error verifying denial of existence for xn--wgbh1c. type A: No keys with the keytag and algorithm from the RRSIG found
;;[S] self sig OK; [B] bogus; [T] trusted

dns.google.com

dns.google.com is separate from Google Public DNS (8.8.8.8). During this DNSSEC outage, dns.google.com showed a DNSSEC failure for xn--wgbh1c.

Logfile examples

These Unbound log entries come from different Unbound instances, each on different servers in different geographical regions.