handling ddos attacks

Fri May 21 05:39:20 UTC 2004

At 12:00 PM 20-05-04 -0700, Wayne E. Bouchard wrote:

>I too would be interested if someone could point a good white paper
>for cisco DDOS protection mechanisms and best practices in general.

For Cisco specific ideas try:
http://www.ripe.net/ripe/meetings/archive/ripe-41/tutorials/eof-ddos.pdf
specifically slides 86-92 and 105-127.

-Hank

>On Thu, May 20, 2004 at 11:52:01AM -0700, Mark Kent wrote:
> >
> > I've been trying to find out what the current BCP is for handling ddos
> > attacks.  Mostly what I find is material about how to be a good
> > net.citizen (we already are), how to tune a kernel to better withstand
> > a syn flood, router stuff you can do to protect hosts behind it, how
> > to track the attack back to the source, how to determine the nature of
> > the traffic, etc.
> >
> > But I don't care about most of that.  I care that a gazillion
> > pps are crushing our border routers (7206/npe-g1).
> >
> > Other than getting bigger routers, is it still the case that the best
> > we can do is identify the target IP (with netflow, for example) and
> > have upstreams blackhole it?
> >
> > Thanks,
> > -mark
>
>---
>Wayne Bouchard
>web at typo.org
>Network Dude
>http://www.typo.org/~web/