North American Network Operators Group
Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: Malicious DNS request?

  • From: Brad Knowles
  • Date: Thu May 12 11:15:34 2005 
At 12:41 PM +0400 2005-05-12, Gadi Evron quoted Joe Shen:


 How could such request be filtered or minimize its
 affaction on DNS server?

 Either this is a DDoS (woohoo!! I used the forbidden word) or you are
 seeing a botnet trying to connect and putting in some smoke-screen while
 at it to try and poison dns-top.

 I'd suggest dropping requests for domains you don't hold.

	That's kind of hard to do if you're running a recursive/caching nameserver.

--
Brad Knowles, <brad@stop.mail-abuse.org>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

    -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
    Assembly to the Governor, November 11, 1755

  SAGE member since 1995.  See <http://www.sage.org/> for more info.