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Re: UDP port 80 DDoS attack
From: Steve Bertrand <steve.bertrand () gmail com>
Date: Sun, 05 Feb 2012 22:08:19 -0500

On 2012.02.05 20:37, Keegan Holley wrote:
2012/2/5 Dobbins, Roland<rdobbins () arbor net>

S/RTBH - as opposed to D/RTBH - doesn't kill the patient.  Again, suggest
you read the preso.

Source RTBH often falls victim to rapidly changing or spoofed source IP"s.
It also isn't as widely supported as it should be. I never said DDOS was
hopeless, there just aren't a wealth of defenses against it.

This is so very easily automated. Even if you don't actually want to trigger the routes automatically, finding the sources you want to blackhole is as simple as a monitor port, tcpdump and some basic Perl.

...and as far as this not having been deployed in many ISPs (per your next message)... their mitigation strategies should be asked up front, and if they don't have any (or don't know what you speak of), find a new ISP.


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