----Mensaje original---- De: deleskie@gmail.com Fecha: 08/12/2010 12:31 Para: "Drew Weaver"<drew.weaver@thenap.com> CC: "alvaro.sanchez@adinet.com.uy"<alvaro.sanchez@adinet.com.uy>, "rdobbins@arbor.net"<rdobbins@arbor.net>, "North American Operators' Group"<nanog@nanog.org> Asunto: Re: Over a decade of DDOS--any progress yet?

+1

On Wed, Dec 8, 2010 at 10:30 AM, Drew Weaver <drew.weaver@thenap.com> wrote:

...

Yes, but this obviously completes the 'DDoS attack' and sends the signal that the bully will win.

-Drew

-----Original Message----- From: alvaro.sanchez@adinet.com.uy [mailto:alvaro.sanchez@adinet. com.uy] Sent: Wednesday, December 08, 2010 8:46 AM To: rdobbins@arbor.net; North American Operators' Group Subject: Re: Over a decade of DDOS--any progress yet?

A very common action is to blackhole ddos traffic upstream by sending a bgp route to the next AS with a preestablished community indicating

...

traffic must be sent to Null0. The route may be very specific, in order to impact as less as possible. This needs previous coordination between providers. Regards.

...

----Mensaje original---- De: rdobbins@arbor.net Fecha: 08/12/2010 10:53 Para: "North American Operators' Group"<nanog@nanog.org> Asunto: Re: Over a decade of DDOS--any progress yet?

On Dec 8, 2010, at 7:28 PM, Arturo Servin wrote:

...

     One big problem (IMHO) of DDoS is that sources (the host of botnets) may be completely unaware that they are part of a DDoS. I do not mean the bot machine, I mean the ISP connecting those.

The technology exists to detect and classify this attack traffic, and is deployed in production networks today.

And of course, the legitimate owners of the botted hosts are generally unaware that their machine is being used for nefarious purposes.

...

     In the other hand the target of a DDoS cannot do anything to stop to attack besides adding more BW or contacting one by one the whole path of providers to try to minimize the effect.

Actually, there're lots of things they can do.

...

     I know that this has many security concerns, but would it be good a signalling protocol between ISPs to inform the sources of a DDoS attack in order to take semiautomatic actions to rate-limit the

...

as close as the source? Of course that this is more complex that

May be. Anyway, under ddos attack, your links may be congested, and you need to recover them. You have small margin to move. The farther upstream the attack is repelled, the better chances you have for restoring connectivity. the traffic these

...

three or two lines, but I wonder if this has been considerer in the past.

...

It already exists.

----------------------------------------------------------------------- Roland Dobbins <rdobbins@arbor.net> // <http://www.arbornetworks.

com>

...

             Sell your computer and buy a guitar.