After being DDOSed (cf. What just happened to Stack Overflow?) StackOverflow works again and Meta.SO obviously, as well. I also noticed, that superuser.com works. But all subdomains of stackexchange.com are still down (I actually did test only some of them).

Are there known reasons? Can someone tell something about a time span, how long this will last?

IS the actual problem now, that perhaps thousands of users continiously are pinging their favorite SE site?


We have performed a DNS change to mitigate a DDOS attack. Hopefully your favorite Stack Exchange site will be coming back to life here in a bit. We are monitoring the situation closely.

  • Remark: Users should also flush the DNS cache on their local machines. – Speravir Feb 16 '14 at 22:05

This is funny (in Ask Ubuntu only 10kers):

enter image description here

  • 15
    Could be real, or could just be some lozer who thinks they're being funny. I'm leaning towards the latter. – Robert Harvey Feb 16 '14 at 22:22
  • 3
    @RobertHarvey could be taking credit for someones work D:. – Braiam Feb 16 '14 at 22:24
  • @Speravir: It's almost certainly deleted by now. – Robert Harvey Feb 16 '14 at 22:24
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    @RobertHarvey They've been threatening this for a while now.. – ɥʇǝS Feb 16 '14 at 22:24
  • So I guess I wasn't wrong when I said this: meta.stackexchange.com/questions/221418/… – Mysticial Feb 16 '14 at 22:25
  • @Mysticial Nope. – ɥʇǝS Feb 16 '14 at 22:26
  • @GuilhermeBernal: Already deleted. Screenshot: i.stack.imgur.com/BzpBN.png – Speravir Feb 16 '14 at 22:41
  • LOL! That's so stupid. – William Edwards Aug 1 '14 at 19:07

From my side it looks like the Stack Exchange Network is doing a failover which impacts the IP adresses for the servers. For all domains the DNS records has to be updated and then those updates need to propagate to all DNS servers and finally your own box.

The updating takes time. Maybe because a human has to enter the new IP addresses in some management console at an ISP hosting the DNS.

  • Thanks, René. It’s mean, that an admin answered, too. ;-) – Speravir Feb 16 '14 at 22:13
  • That is the only truth...I upvoted Geoff his answer – rene Feb 16 '14 at 22:14

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