DNS64 stopped working

[cui...@gmail.com]

It seems like the public DNS64 stopped working for IPv4 only websites such as test-ipv6.com as of Monday Sep 25. Anyone else can experience the same?

[Erik Kline]

Hmmm... At first I saw:

prompt$ dig @publicdns64.google.com test-ipv6.com
; <<>> DiG 9.8.3-P1 <<>> @publicdns64.google.com test-ipv6.com
; (2 servers found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44418
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;test-ipv6.com. IN A

;; ANSWER SECTION:
test-ipv6.com. 299 IN A 133.208.22.95

;; Query time: 202 msec
;; SERVER: 2001:4860:4860::6464#53(2001:4860:4860::6464)
;; WHEN: Tue Sep 26 23:02:46 2017
;; MSG SIZE rcvd: 47

prompt$ dig @publicdns64.google.com -t AAAA test-ipv6.com
; <<>> DiG 9.8.3-P1 <<>> @publicdns64.google.com -t AAAA test-ipv6.com
; (2 servers found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27138
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;test-ipv6.com. IN AAAA

;; AUTHORITY SECTION:
test-ipv6.com. 299 IN SOA ns1.test-ipv6.com.
jfesler.test-ipv6.com. 2016030401 10800 3600 604800 86400

;; Query time: 187 msec
;; SERVER: 2001:4860:4860::6464#53(2001:4860:4860::6464)
;; WHEN: Tue Sep 26 23:02:55 2017
;; MSG SIZE rcvd: 79

But shortly thereafter it seemed to start working again:

prompt$ for i in a aaaa; do dig @publicdns64.google.com -t $i
+short test-ipv6.com; done
133.208.22.95
64:ff9b::85d0:165f

...hmm

On 26 September 2017 at 19:31, <cui...@gmail.com> wrote:
> It seems like the public DNS64 stopped working for IPv4 only websites such as test-ipv6.com as of Monday Sep 25. Anyone else can experience the same?
>

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[ondrej....@gmail.com]

On Tuesday, September 26, 2017 at 3:46:46 PM UTC+2, cui...@gmail.com wrote:

It seems like the public DNS64 stopped working for IPv4 only websites such as test-ipv6.com as of Monday Sep 25. Anyone else can experience the same?

I confirm the problem. I've noticed it on Sep 27. I've created a RIPE Atlas measurement that confirms that DNS64 is failing for most parts of the world with an exception of some Asia-Pacific probes. I've also filled an issue. No response yet.

--

Ondřej Caletka 

[ondrej....@gmail.com]

The issue got accepted and right now, Google seems to be rolling out a fix right now. In my case, it's working already:

 $ dig +short ipv4only.arpa AAAA @2001:4860:4860::64 

64:ff9b::c000:ab
64:ff9b::c000:aa

-- 

Ondřej Caletka

[Mike Cui]

Any updates on this issue? Still not working for me...

$ dig @publicdns64.google.com -t AAAA test-ipv6.com

; <<>> DiG 9.8.3-P1 <<>> @publicdns64.google.com -t AAAA test-ipv6.com
; (2 servers found)
;; global options: +cmd
;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45054

;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;test-ipv6.com. IN AAAA

;; AUTHORITY SECTION:

test-ipv6.com. 287 IN SOA ns1.test-ipv6.com.

jfesler.test-ipv6.com. 2016030401 10800 3600 604800 86400

;; Query time: 35 msec

;; SERVER: 2001:4860:4860::6464#53(2001:4860:4860::6464)

;; WHEN: Thu Sep 28 12:00:46 2017
;; MSG SIZE rcvd: 79