.zm (Zambia) DNSSEC Outage: 20151206 to 20151208

Updated: December 8, 2015

Overview

This page gives some details on the .zm TLD DNSSEC outage from December 6 to December 8, 2015.

DNSViz / Timeline

DNSSEC Debugger

Unlike DNSViz, Verisign's DNSSEC Debugger doesn't archive results, so here's a screenshot of my web browser's output from December 6, 2015:

December 6 2015 .zm (Zambia) DNSSEC outage

OpenDNS & Google Public DNS

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

With OpenDNS, queries succeed:

$ dig ns zm. @resolver1.opendns.com.

; <<>> DiG 9.4.2-P2 <<>> ns zm. @resolver1.opendns.com.
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44461
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;zm. IN NS

;; ANSWER SECTION:
zm. 86400 IN NS ns2.zamnet.zm.
zm. 86400 IN NS ns-zm.afrinic.net.
zm. 86400 IN NS hippo.ru.ac.za.
zm. 86400 IN NS ns1.zamnet.zm.

;; Query time: 285 msec
;; SERVER: 208.67.222.222#53(208.67.222.222)
;; WHEN: Sun Dec 6 14:23:06 2015
;; MSG SIZE rcvd: 122

With Google Public DNS, queries fail:

$ dig ns zm. @8.8.8.8

; <<>> DiG 9.4.2-P2 <<>> ns zm. @8.8.8.8
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 24381
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;zm. IN NS

;; Query time: 598 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Sun Dec 6 14:23:06 2015
;; MSG SIZE rcvd: 20

dnscheck

dnscheck.labs.nic.cz shows expired signatures at 2015-12-06 16:56:24. (requires javascript.)

dnscheck.iis.se shows expired signatures at 2015-12-06 16:56:27. (requires javascript.)

Zonemaster

Zonemaster archived this .zm TLD DNSSEC outage.

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