[CentOS] DNS DoS attack
Rainer Duffner
rainer at ultra-secure.de
Fri Aug 17 07:45:18 UTC 2012
Am Thu, 16 Aug 2012 22:18:19 -0700
schrieb John R Pierce <pierce at hogranch.com>:
> On 08/16/12 9:54 PM, Jussi Hirvi wrote:
> >> Aug 17 07:41:38 mx2 named[6873]: client 205.145.64.200#53: query
> >> (cache) 'ripe.net/ANY/IN' denied
> >> >Aug 17 07:41:38 mx2 named[6873]: client 204.10.45.5#53: query
> >> >(cache) 'ripe.net/ANY/IN' denied Aug 17 07:41:38 mx2 named[6873]:
> >> >client 78.40.35.212#53: query (cache) 'ripe.net/ANY/IN' denied
> >> >Aug 17 07:41:38 mx2 named[6873]: client 207.207.3.126#53: query
> >> >(cache) 'ripe.net/ANY/IN' denied
> > Are there any ways to mitigate this, or do I just have to wait?
>
>
> meh, if its coming from lots of random hosts, then fail2ban style
> techniques won't work. I assume this is an authoritative name
> server? does it have recursive queries disabled so it can only return
> results for the domain(s) its authoritative for ?
It's a common "attack".
Just search google.
I think, someone mentioned a firewall rule here a couple of weeks ago
to block these types of queries.
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