cpp.edu DNSSEC Outage: 2017-07-01
Updated: July 1, 2017
Overview
This page gives some details on the cpp.edu (California State Polytechnic University, Pomona) DNSSEC outage on July 1, 2017.
Timeline / DNSViz
- 2017-07-01 07:11:33 UTC — Bogus DNSSEC delegation
- 2017-07-01 07:11:43 UTC — Bogus DNSSEC delegation
- 2017-07-01 07:18:21 UTC — Bogus DNSSEC delegation
Zonemaster
- zonemaster.net archived "Delegation from parent to child is not properly signed (no_dnskey; no_signature)."
- zonemaster.fr archived "Delegation from parent to child is not properly signed (no_dnskey; no_signature)."
OpenDNS & DNS-OARC
OpenDNS does not support DNSSEC, and instead supports DNSCurve. DNS-OARC currently supports only DNSSEC, and thus, DNS-OARC's users saw SERVFAIL for queries under cpp.edu during this outage.
With OpenDNS, without DNSSEC, queries succeed:
$ dig mx cpp.edu. @resolver1.opendns.com.
; <<>> DiG 9.4.2-P2 <<>> mx cpp.edu. @resolver1.opendns.com.
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62134
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;cpp.edu. IN MX
;; ANSWER SECTION:
cpp.edu. 300 IN MX 10 mxa-001ba602.gslb.pphosted.com.
cpp.edu. 300 IN MX 10 mxb-001ba602.gslb.pphosted.com.
;; Query time: 28 msec
;; SERVER: 208.67.222.222#53(208.67.222.222)
;; WHEN: Sat Jul 1 07:11:16 2017
;; MSG SIZE rcvd: 100
With DNS-OARC, because of DNSSEC, queries fail:
$ dig +dnssec mx cpp.edu. @184.105.193.73
; <<>> DiG 9.4.2-P2 <<>> +dnssec mx cpp.edu. @184.105.193.73
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 1294
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 4096
;; QUESTION SECTION:
;cpp.edu. IN MX
;; Query time: 546 msec
;; SERVER: 184.105.193.73#53(184.105.193.73)
;; WHEN: Sat Jul 1 07:11:18 2017
;; MSG SIZE rcvd: 36
Logfile example
- [1498893073] unbound[43086:0] info: validation failure <cpp.edu. A IN>: signature missing from 207.62.80.235 for key cpp.edu. while building chain of trust