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Re: Are we really this helpless? (Re: isprime DOS in progress)
From: Jeffrey Lyon <jeffrey.lyon () blacklotus net>
Date: Fri, 23 Jan 2009 21:13:33 -0500

I respectfully disagree. Network engineers have to keep up with many
tasks and preventing DoS/DDoS should be the responsibility of
everyone. I see more folks worried about spam than they are actual

My two cents.

Jeffrey Lyon, Leadership Team
jeffrey.lyon () blacklotus net | http://www.blacklotus.net
Black Lotus Communications of The IRC Company, Inc.

Look for us at HostingCon 2009 in Washington, DC on August 10th - 12th
at Booth #401.

On Fri, Jan 23, 2009 at 9:05 PM, Seth Mattinen <sethm () rollernet us> wrote:
Noel Butler wrote:

On Sat, 2009-01-24 at 07:21, Chris McDonald wrote:

We [AS3491] null0'd the IP earlier.  Rest-of-world encouraged to do the
same :/

Wrong approach, they are *innocent* in this as are the new targets.

insert into your favourite acl:
deny udp host neq 53 any eq 53
deny udp host neq 53 any eq 53

But it's much less work to add a filter on the name server as others
have mentioned.

Having the world trying to keep up with ACL entries seems futile. Is there
really nothing to be done about this? (Yes, I know, BCP38, but obviously the
accomplice providers don't care.)


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