[dns-operations] Github Down cause of DNS (dyne) problem ?

[Andrew Sullivan]

Dyn has been experiencing a series of DDoS attacks.  You can learn
current status of Dyn infrastructure by monitoring
https://www.dynstatus.com/.  Full disclosure: I work for Dyn, but I do
not speak for them on this issue or any other.

Best regards,

A

On Fri, Oct 21, 2016 at 06:40:58PM +0200, Mathieu Goessens wrote:
> Hi,
> 
> Anybody seeing the same thing as me ?
> 
> $ dig github.com
> 
> ; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>> github.com
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 53105
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
> 
> ;; QUESTION SECTION:
> ;github.com.			IN	A
> 
> ;; Query time: 3001 msec
> ;; SERVER: 192.44.77.1#53(192.44.77.1)
> ;; WHEN: Fri Oct 21 18:34:17 2016
> ;; MSG SIZE  rcvd: 28
> 
> $ dig ns github.com  @a.gtld-servers.net.
> 
> ; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>> ns github.com @a.gtld-servers.net.
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 9288
> ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 4, ADDITIONAL: 4
> ;; WARNING: recursion requested but not available
> 
> ;; QUESTION SECTION:
> ;github.com.			IN	NS
> 
> ;; AUTHORITY SECTION:
> github.com.		172800	IN	NS	ns1.p16.dynect.net.
> github.com.		172800	IN	NS	ns3.p16.dynect.net.
> github.com.		172800	IN	NS	ns2.p16.dynect.net.
> github.com.		172800	IN	NS	ns4.p16.dynect.net.
> 
> $ dig github.com @ns1.p16.dynect.net.
> 
> ; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>> github.com @ns2.p16.dynect.net.
> ;; global options: +cmd
> ;; connection timed out; no servers could be reached
> 
> Same for ns2,3,4
> 
> Tested from a few AS in France
> 

-- 
Andrew Sullivan
ajs at anvilwalrusden.com