And those are much more complex to detect than SYN attacks or simple
flood attacks with ICMP.
But even for simple flood attacks, I still think that the target has
very few defence mechanisms, and those that exists require a complex
coordination with upstreams.
Cheers,
.as
On 8 Dec 2010, at 13:39, Jeffrey Lyon wrote:
> We have seen a recent trend of attackers "legitimately" purchasing
> servers to use for attacks. They'll setup a front company, attempt to
> make the traffic look legitimate, and then launch attacks from their
> "legitimate" botnet.
>
> Jeff
>
> On Wed, Dec 8, 2010 at 10:33 AM, Arturo Servin <[email protected]>
> wrote:
>>
>> On 8 Dec 2010, at 13:12, [email protected] wrote:
>>
>>> Date: Wed, 8 Dec 2010 12:53:51 +0000
>>> From: "Dobbins, Roland" <[email protected]>
>>> Subject: Re: Over a decade of DDOS--any progress yet?
>>> To: North American Operators' Group <[email protected]>
>>> Message-ID: <[email protected]>
>>> Content-Type: text/plain; charset="us-ascii"
>>>
>>>
>>> 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.
>>
>> Yes, they do exist. But, is people really filtering out attacks or
>> just watching the attacks going out?
>>
>>
>>>
>>> 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.
>>
>> Yes, but all of them rely on your upstreams or in mirroring your
>> content. If 100 Mbps are reaching your input interface of 10Mbps there is
>> not much that you 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 traffic as close as
>>>> the source? Of course that this is more complex that these three or two
>>>> lines, but I wonder if this has been considerer in the past.
>>>
>>> It already exists.
>>
>> If you have an URL would be good. I only found a few research papers
>> on the topic and RSVP documents but nothing really concrete.
>>
>> Regards,
>> -as
>
>
>
> --
> Jeffrey Lyon, Leadership Team
> [email protected] | http://www.blacklotus.net
> Black Lotus Communications - AS32421
> First and Leading in DDoS Protection Solutions
