af.mil DNSSEC Outage: 2015-05-29

Updated: May 29, 2015

Overview

This page gives some details on the af.mil DNSSEC outage on May 29, 2015. The outage was fixed by removing DNSSEC support, by deleting the DS record.

Verisign's DNSSEC Debugger

Verisign doesn't archive test results, unlike DNSViz. So here's a screenshot I took on May 29, 2015:

af.mil dnssec outage

Timeline / DNSViz

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 af.mil during this outage.

With OpenDNS, queries succeed:

$ dig www.af.mil. @resolver2.opendns.com

; <<>> DiG 9.4.2-P2 <<>> www.af.mil. @resolver2.opendns.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20117
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.af.mil. IN A

;; ANSWER SECTION:
www.af.mil. 14 IN CNAME www.af.mil.edgesuite.net.
www.af.mil.edgesuite.net. 14 IN CNAME a499.dscb.akamai.net.
a499.dscb.akamai.net. 20 IN A 23.59.189.83
a499.dscb.akamai.net. 20 IN A 23.59.189.90

;; Query time: 36 msec
;; SERVER: 208.67.220.220#53(208.67.220.220)
;; WHEN: Fri May 29 14:24:47 2015
;; MSG SIZE rcvd: 129

With Google Public DNS, with DNSSEC, queries fail:

$ dig www.af.mil. @8.8.8.8

; <<>> DiG 9.4.2-P2 <<>> www.af.mil. @8.8.8.8
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 51210
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.af.mil. IN A

;; Query time: 103 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Fri May 29 14:24:57 2015
;; MSG SIZE rcvd: 28

dnscheck

dnscheck.iis.se archived a DNSSEC outage at 2015-05-29 09:26:46 (requires javascript).

dnscheck.labs.nic.cz archived a DNSSEC outage at 2015-05-29 09:27:33 (requires javascript).

Zonemaster

Zonemaster archived this af.mil DNSSEC outage.

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