Re: SMURF amplifier block list

[Karl Denninger <karl () mcs net>]

On Tue, Apr 14, 1998 at 08:49:04AM -0700, Aaron Beck wrote:
> On Mon, 13 Apr 1998, Stephen Sprunk wrote:
>
> > Then again, filtering any packets to or from x.x.x.255 would have a
> > similar but more profound effect.  Anyone who actually uses a .255
> > address for a host is asking for trouble anyways.
>
> the problem with that thinking, of course, is going to crop up when you
> encounter /23's and greater.
>
> -- Aaron

Not often.  Few people are actually supernetting within a given broadcast
domain.  There's still an awful lot of hardware that doesn't work right in
that environment.

The larger problem is that subnetted /24s still are wide open.  This kind of
filter won't block anything from their broadcast addresses, since they're
not the .255 address.

--
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