Floating an idea...

[Karl Denninger <karl () mcs net>]

Hi folks,

What say all of you to the following idea:

        Block at the entry/peer router level all packets from networks which
        are shown to be "Smurf friendly" - that is, those network numbers
        and/or blocks which are smurf amplifiers (have directed broadcasts
        enabled)?

I was thinking of something similar to the RBL, but that doesn't quite do
it; a pull-down route to a sink doesn't do you any good, since what you're
after is the *source* address.

Now I know this may be entirely impractical for some folks, if for no other
reason than CPU resources in those gateways.

But this kind of thing would certainly send a message to those open
amplifier networks in a big hurry.

Think of it as an "attractive nuisance" problem (and fix).

-
-- 
Karl Denninger (karl () MCS Net)| MCSNet - Serving Chicagoland and Wisconsin
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