[dns-operations] R: R: Facebook DNS down in Europe?

Thu Oct 19 14:35:05 UTC 2017

Ciao,

ISP1 is 24608 (my workplace), ISP2 is 12874 (my VDSL home line).

Ciao,
A.

Da: manu tman [mailto:chantr4 at gmail.com]
Inviato: giovedì 19 ottobre 2017 16:33
A: Costantino Andrea (Con) <andrea.costantino at h3g.it>; bert hubert <bert.hubert at netherlabs.nl>; dns-operations at dns-oarc.net
Oggetto: Re: [dns-operations] R: Facebook DNS down in Europe?

Thanks Bert and Constantinople,

Waking up to this :( . I will get people checking internally.
So this is only affecting v4 right? Do you have specific ISP ASN ? This could help. Any traceroute may help too if you can provide any.
Tks
Manu

On Thu, Oct 19, 2017 at 7:23 AM Costantino Andrea (Con) <andrea.costantino at h3g.it<mailto:andrea.costantino at h3g.it>> wrote:
South Europe (Italy) seems to work from ISP1, while ISP2 does not:

(ISP1)
[root at moni ~]# dig -4 star-mini.c10r.facebook.com<http://star-mini.c10r.facebook.com> @a.ns.c10r.facebook.com<http://a.ns.c10r.facebook.com> +tries=1

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.62.rc1.el6_9.4 <<>> -4 star-mini.c10r.facebook.com<http://star-mini.c10r.facebook.com> @a.ns.c10r.facebook.com<http://a.ns.c10r.facebook.com> +tries=1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47281
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 4
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;star-mini.c10r.facebook.com<http://star-mini.c10r.facebook.com>.   IN      A

;; ANSWER SECTION:
star-mini.c10r.facebook.com<http://star-mini.c10r.facebook.com>. 60 IN      A       31.13.86.36

;; AUTHORITY SECTION:
c10r.facebook.com<http://c10r.facebook.com>.      3600    IN      NS      a.ns.c10r.facebook.com<http://a.ns.c10r.facebook.com>.
c10r.facebook.com<http://c10r.facebook.com>.      3600    IN      NS      b.ns.c10r.facebook.com<http://b.ns.c10r.facebook.com>.

;; ADDITIONAL SECTION:
a.ns.c10r.facebook.com<http://a.ns.c10r.facebook.com>. 3600    IN      AAAA    2a03:2880:fffe:b:face:b00c:0:99
a.ns.c10r.facebook.com<http://a.ns.c10r.facebook.com>. 3600    IN      A       69.171.239.11
b.ns.c10r.facebook.com<http://b.ns.c10r.facebook.com>. 3600    IN      AAAA    2a03:2880:ffff:b:face:b00c:0:99
b.ns.c10r.facebook.com<http://b.ns.c10r.facebook.com>. 3600    IN      A       69.171.255.11

;; Query time: 43 msec
;; SERVER: 69.171.239.11#53(69.171.239.11)
;; WHEN: Thu Oct 19 16:13:29 2017
;; MSG SIZE  rcvd: 184

(ISP2)
[root at moni2 ~]# dig -4 star-mini.c10r.facebook.com<http://star-mini.c10r.facebook.com> @a.ns.c10r.facebook.com<http://a.ns.c10r.facebook.com> +tries=1

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.62.rc1.el6_9.4 <<>> -4 star-mini.c10r.facebook.com<http://star-mini.c10r.facebook.com> @a.ns.c10r.facebook.com<http://a.ns.c10r.facebook.com> +tries=1
;; global options: +cmd
;; connection timed out; no servers could be reached

-----Messaggio originale-----
Da: dns-operations [mailto:dns-operations-bounces at dns-oarc.net<mailto:dns-operations-bounces at dns-oarc.net>] Per conto di bert hubert
Inviato: giovedì 19 ottobre 2017 15:42
A: dns-operations at dns-oarc.net<mailto:dns-operations at dns-oarc.net>
Oggetto: [dns-operations] Facebook DNS down in Europe?

Hi,

Is anyone from Facebook here? We have huge issues resolving Facebook domains from some of our customers in The Netherlands and Belgium.

From our own networks we note that some Facebook servers are indeed dropping queries over IPv4:

$ dig -4 star-mini.c10r.facebook.com<http://star-mini.c10r.facebook.com> @a.ns.c10r.facebook.com<http://a.ns.c10r.facebook.com> +tries=1

; <<>> DiG 9.10.3-P4-Ubuntu <<>> -4 star-mini.c10r.facebook.com<http://star-mini.c10r.facebook.com> @a.ns.c10r.facebook.com<http://a.ns.c10r.facebook.com> +tries=1 ;; global options: +cmd ;; connection timed out; no servers could be reached

We are tempted to deploy workarounds to serve old data.

http://downdetector.com/status/facebook/map/ actually has a pretty map describing the problem right now.

If anyone from Facebook wants us to try things, please let us know.

Bert
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