DDOS solution recommendation

Damian Menscher damian at google.com
Sun Jan 11 05:43:03 UTC 2015

On Sat, Jan 10, 2015 at 8:37 PM, Paul S. <contact at winterei.se> wrote:

> While it indeed is true that attacks up to 600 gbit/s (If OVH and
> CloudFlare's data is to be believed) have been known to happen in the wild,
> it's very unlikely that you need to mitigate anything close.

Agree that trusting others' numbers is unwise (there's a bias to inflate
sizes), but from personal experience I can say that their claims are

The average attack is usually around the 10g mark (That too barely) -- so
> even solutions that service up to 20g work alright.

I'm not sure how to compute an "average" -- I generally just track the
maximums.  I suspect some reports of 10Gbps attacks are simply that the
attack saturated the victim's link, and they were unable to measure the
true size.  (I agree there are many actual 10Gbps attacks also, of course
-- attackers know this size will usually work, so they don't waste

Obviously, concerns are different if you're an enterprise that's a DDoS
> magnet -- but for general service providers selling 'protected services,'
> food for thought.

Even if you're just a hosting provider, your customers may be DDoS
magnets.  Coincidentally, at the time you pressed "send", we were seeing a
40Gbps attack targeting a customer.


On 1/11/2015 午後 12:48, Damian Menscher wrote:
>> On Thu, Jan 8, 2015 at 9:01 AM, Manuel Marín <mmg at transtelco.net> wrote:
>>  I was wondering what are are using for DDOS protection in your networks.
>>> We
>>> are currently evaluating different options (Arbor, Radware, NSFocus,
>>> RioRey) and I would like to know if someone is using the cloud based
>>> solutions/scrubbing centers like Imperva, Prolexic, etc and what are the
>>> advantages/disadvantages of using a cloud base vs an on-premise solution.
>>> It would be great if you can share your experience on this matter.
>>>  On-premise solutions are limited by your own bandwidth.  Attacks have
>> been
>> publicly reported at 400Gbps, and are rumored to be even larger.  If you
>> don't have that much network to spare, then packet loss will occur
>> upstream
>> of your mitigation.  Having a good relationship with your network
>> provider(s) can help here, of course.
>> If you go with a cloud-based solution, be wary of their SLA.  I've seen
>> some claim 100% uptime (not believable) but of course no refund/credits
>> for
>> downtime.  Another provider only provides 20Gbps protection, then will
>> null-route the victim.
>> On Sat, Jan 10, 2015 at 4:19 PM, Charles N Wyble <charles at thefnf.org>
>> wrote:
>>  Also how are folks testing ddos protection? What lab gear,tools,methods
>>> are you using to determine effectiveness of the mitigation.
>> Live-fire is the cheapest approach (just requires some creative trolling)
>> but if you want to control the "off" button, cloud VMs can be tailored to
>> your needs.  There are also legitimate companies that do network stress
>> testing.
>> Keep in mind that you need to test against a variety of attacks, against
>> all components in the critical path.  Attackers aren't particularly
>> methodical, but will still randomly discover any weaknesses you've
>> overlooked.
>> Damian

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