Re: WANTED: ISPs with DDoS defense solutions

["Petri Helenius" <pete () he iki fi>]

I would say that because backdoored hosts are easily available in large
quantities, spoofing does not make sense and usually alarms various systems
more quickly than packets from legitimate addresses.

Pete

----- Original Message ----- 
From: <variable () ednet co uk>
To: "Rob Thomas" <robt () cymru com>
Cc: "NANOG" <nanog () merit edu>
Sent: Thursday, July 31, 2003 4:17 PM
Subject: Re: WANTED: ISPs with DDoS defense solutions


> On Wed, 30 Jul 2003, Rob Thomas wrote:
>
> > I've tracked 1787 DDoS attacks since 01 JAN 2003.  Of that number,
> > only 32 used spoofed sources.  I rarely see spoofed attacks now.
>
> Do you have any ideas as to why that is?  Is it due to more providers 
> doing source filtering?  It wouldn't make sense for attackers to become 
> less sophisticated unless they became more difficult to catch for other 
> reasons (e.g. botnets getting bigger).
>
> Rich