Re: Effective ways to deal with DDoS attacks?

[Richard A Steenbergen <ras () e-gerbil net>]

On Wed, May 01, 2002 at 11:56:07PM -0600, Pete Kruckenberg wrote:
> On Thu, 2 May 2002, Richard A Steenbergen wrote:
>
> > You have an interesting situation. I think rate limiting
> > outbound RSTs would be the least offensive thing you
> > could do, off the top of my head.
>
> What about just blocking out-going RSTs altogether from our borders?
> While this interferes with "proper" TCP functionality, would it actually
> interfere enough to cause noticeable problems? Would certainly be less
> of a burden on routers than rate-limiting.

If you really wanted to try you could probably get away with it, but 
you'll probably get complaints about broken behavior during "peacetime".

I'd still advise a rate limit, say something on the order of 512Kbps or
less depending on your pipe, and outbound TCP RST. If this makes your
routers fall over, you need new routers.

-- 
Richard A Steenbergen <ras () e-gerbil net>       http://www.e-gerbil.net/ras
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