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

[bert hubert]

Taking this off-list, thanks everyone for hooking us up!

	Bert

On Thu, Oct 19, 2017 at 02:33:02PM +0000, manu tman wrote:
> 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> wrote:
> 
> > South Europe (Italy) seems to work from ISP1, while ISP2 does not:
> >
> > (ISP1)
> > [root at moni ~]# dig -4 star-mini.c10r.facebook.com @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 @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.   IN      A
> >
> > ;; ANSWER SECTION:
> > star-mini.c10r.facebook.com. 60 IN      A       31.13.86.36
> >
> > ;; AUTHORITY SECTION:
> > c10r.facebook.com.      3600    IN      NS      a.ns.c10r.facebook.com.
> > c10r.facebook.com.      3600    IN      NS      b.ns.c10r.facebook.com.
> >
> > ;; ADDITIONAL SECTION:
> > a.ns.c10r.facebook.com. 3600    IN      AAAA
> > 2a03:2880:fffe:b:face:b00c:0:99
> > a.ns.c10r.facebook.com. 3600    IN      A       69.171.239.11
> > b.ns.c10r.facebook.com. 3600    IN      AAAA
> > 2a03:2880:ffff:b:face:b00c:0:99
> > 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 @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 @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] Per conto
> > di bert hubert
> > Inviato: giovedì 19 ottobre 2017 15:42
> > A: 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 @a.ns.c10r.facebook.com +tries=1
> >
> > ; <<>> DiG 9.10.3-P4-Ubuntu <<>> -4 star-mini.c10r.facebook.com @
> > 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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