limiting number of recursion/queries per IP address

[Kebba Foon]

On Tue, 2010-10-26 at 15:22 -0400, Todd Snyder wrote:
> What version of bind, on what OS?
> 
I use Debian 5.0 with bind 9.6-ESV-R1 but also i thought that the OS
might have some security holes so i try FreeBSD 8.1 with BIND 9.7.1 but
still have ihave the same problems.

> here may be some things you can do with iptables to limit connections
> 
> http://www.debian-administration.org/articles/187
> 
i will just look into these but it done thing iptables will be the ideal
solution.
> I don't recall seeing anything native to BIND that would allow for limits per src.
> 
> t.
> 
> -----Original Message-----
> From: bind-users-bounces+tsnyder=rim.com at lists.isc.org [mailto:bind-users-bounces+tsnyder=rim.com at lists.isc.org] On Behalf Of Kebba Foon
> Sent: Tuesday, October 26, 2010 2:27 PM
> To: bind-users at lists.isc.org
> Subject: limiting number of recursion/queries per IP address
> 
> Dear List,
> 
> Is is possible to limit the number of recursion/queries per IP address.
> there is some kind of virus thats bombarding my dns servers with a lot
> of queries, i realize that when ever the total number of recursion
> clients reach 1000 dns resolution stop working. i have increase the
> recursive-clients to 10000 but still these those not help. and also i
> have increase the number of max open files on my OS which at one point
> was complaining about too many open files. can someone please direct me
> to how best to solve this problem its some kind of DDOS.
> 
> Thanks
> Kebba
> 
> _______________________________________________
> bind-users mailing list
> bind-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/bind-users
> 
> ---------------------------------------------------------------------
> This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.