[CentOS] DNS DoS attack

John R Pierce
Fri, 17 Aug 2012 05:18:19 -0000

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 ?



--
john r pierce                            N 37, W 122
santa cruz ca                         mid-left coast