.kg TLD DNSSEC Outage: 2018-01-01

Updated: January 1, 2018

Overview

This page gives some details on the kg (Kyrgyzstan) TLD DNSSEC outage on January 1, 2018.

Timeline / DNSViz

Verisign's DNSSEC Debugger

Here's a screenshot I took on January 1, 2018, of the DNSSEC Debugger output:

January 1, 2018 kg TLD 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 kg. @8.8.8.8

; <<>> DiG 9.4.2-P2 <<>> +dnssec ns kg. @8.8.8.8
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 19126
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

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

;; Query time: 381 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon Jan 1 00:03:04 2018
;; MSG SIZE rcvd: 31

You have to disable DNSSEC to make DNS queries work:

$ dig +cd ns kg. @8.8.8.8

; <<>> DiG 9.4.2-P2 <<>> +cd ns kg. @8.8.8.8
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 53249
;; flags: qr rd ra cd; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;kg. IN NS

;; ANSWER SECTION:
kg. 21599 IN NS KG.CCTLD.AUTHDNS.RIPE.NET.
kg. 21599 IN NS ns.kg.
kg. 21599 IN NS AS.ASIAINFO.kg.

;; Query time: 252 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon Jan 1 00:03:05 2018
;; MSG SIZE rcvd: 102

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: kg.
[B] kg. 86400 IN DNSKEY 256 3 5 ;{id = 49950 (zsk), size = 1024b}
kg. 86400 IN DNSKEY 257 3 5 ;{id = 49954 (ksk), size = 1024b}
[B] Error verifying denial of existence for kg. type A: No keys with the keytag and algorithm from the RRSIG found
;;[S] self sig OK; [B] bogus; [T] trusted

Logfile examples