Re: [Full-disclosure] Ubisoft DDoS

[Christian Sciberras <uuf6429@xxxxxxxxx>]

Perhaps Cisco xt 5650a?

Also, 6500 series are actually switches, not routers. ;-)

Cheers.

On Tue, Mar 9, 2010 at 4:24 PM, Michal <michal@xxxxxxxxxxx> wrote:

> On 09/03/2010 15:12, Valdis.Kletnieks@xxxxxx wrote:
> > On Tue, 09 Mar 2010 15:27:02 +0100, Adrenalin said:
> >> I'm just wondering, even if it's under DDoS, isn't it as easy to block
> as to
> >> collect the list of IP that send too much data, and just block them on
> the
> >> upper level ISP ?
> >
> > You *do* realize that a *small* botnet these days is 75,000 machines, and
> > there's a estimated 140 million compromised zombie boxes out there?
> There's
> > very few boxes that can handle an inbound ACL of 75K entries sanely -
> usually
> > what ends up happening is the upstream drops all traffic *to* the target
> node
> > just so all the *other* boxes at the site still get some bandwidth.
> >
> > And "sending too much data" is hard to quantify - if you have enough
> bots,
> > you can thoroughly DDoS a site using far *less* bandwidth per host than a
> > normal user does.  If the site was designed to handle 10,000 clients each
> > sending 5 packets per second for 10 seconds during a login at game start,
> > it will likely fall over if you throw 100,000 bots at it, each sending
> > 4 packets a second continuously...
> >
>
>
> I've worked at huge online better company and they had network devices
> that worked to stop DDoS as we got hit quite a bit. I have to say they
> managed quite well, often we would only notice because we regularly
> checked the graphs over 24 hours periods. Other times the attacks had
> some successes but they worked well. Can't remember what they where
> called...think it was a company that ended up being bought by Cisco,
> though we did have cards in the 6500 routers to also help out with DDOS.
>
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