bn TLD DNSSEC Outage: 2022-05-18 to 2022-05-19

Date: May 20, 2022

Overview

This page gives some details on the bn (Brunei) TLD DNSSEC outage from May 18 to May 19, 2022.

Verisign's DNSSEC Debugger

Verisign doesn't archive test results, unlike DNSViz. So here's a screenshot I took on May 18, 2022:

bn dnssec outage

Timeline / DNSViz

Here's a screenshot example:

Brunei DNSSEC outage

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 result in SERVFAIL:

$ dig +dnssec ns bn. @8.8.8.8.

; <<>> dig 9.10.8-P1 <<>> +dnssec ns bn. @8.8.8.8.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 2502
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

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

;; Query time: 347 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Wed May 18 10:51:07 UTC 2022
;; MSG SIZE rcvd: 31

You have to disable DNSSEC to make DNS work:

$ dig +cd ns bn. @8.8.8.8.

; <<>> dig 9.10.8-P1 <<>> +cd ns bn. @8.8.8.8.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25256
;; flags: qr rd ra cd; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1

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

;; ANSWER SECTION:
bn. 3600 IN NS NS1.BNNIC.bn.
bn. 3600 IN NS NS4.APNIC.NET.
bn. 3600 IN NS NS2.BNNIC.bn.
bn. 3600 IN NS BN-NS.ANYCAST.PCH.NET.

;; Query time: 96 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Wed May 18 10:51:07 UTC 2022
;; MSG SIZE rcvd: 132

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):

[T] bn. 86400 IN DS 26224 8 2 eab03d1aa2537fc2222def6383be358b88d50520f530d1f1cc4f40f1d83e4109
;; Domain: bn.
;; Signature ok but no chain to a trusted key or ds record
[S] bn. 3600 IN DNSKEY 256 3 8 ;{id = 6468 (zsk), size = 2048b}
bn. 3600 IN DNSKEY 256 3 8 ;{id = 31740 (zsk), size = 2048b}
bn. 3600 IN DNSKEY 256 3 8 ;{id = 62205 (zsk), size = 2048b}
bn. 3600 IN DNSKEY 257 3 8 ;{id = 42604 (ksk), size = 2048b}
[S] Existence denied: bn. A
;;[S] self sig OK; [B] bogus; [T] trusted; [U] unsigned

Zonemaster

dns.google.com

Here's a screenshot from dns.google.com during this DNSSEC outage: dns.google.com shows bn TLD DNSSEC outage

And here's an archive.ph snapshot showing the same.

Logfile examples