full-disclosure - Compromised hosts lists

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Message-ID: <200602210340.k1L3e1Id030235@turing-police.cc.vt.edu>
Date: Tue Feb 21 03:40:17 2006
From: Valdis.Kletnieks at vt.edu (Valdis.Kletnieks@...edu)
Subject: Compromised hosts lists 

On Mon, 20 Feb 2006 16:55:06 MST, James Lay said:
> I had heard tale of a site that had a semi-updated list of compromised
> hosts.  I was hoping that someone knows that link...would LOVE to be
> able to get my firewall to get this list and auto-create an iptables
> rule.  Thanks all!

That's ass backwards.

The secure way to do this is to first deny *all* traffic, and then add
specific rules for machines that you *do* want to talk to.

Think for a bit - if some random cablemodem in another timezone is on the list,
why should you stop packets from it?  Why would you want to accept packets
*before* it showed up on the list?  Why do you still want to accept packets
from *other* boxes in the same /24 or /16?
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