full-disclosure - Re: Dumb question: Is Windows box behind a router safe ?

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Message-ID: <a80158804f70b14d678e1a06c6438619.squirrel@mifritscher.de>
Date: Tue, 22 Sep 2009 20:42:06 +0200 (CEST)
From: "Michael Fritscher" <michael@...tscher.net>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: Dumb question: Is Windows box behind a router
 safe ?

Hi Steve,

I hope you haven't caused a storm with aggressive mails here^^
This maillinglist is more about now detected holes in soft- and hardware...

First, you certainly mean not a normal router (which is on most cases 100%
transparent in both directions), but a NAT-router.

What the NAT blocks (in most cases) are incomings connections - But
expecially since XP SP2 this is a very seldom used way to attack
computers.
Nowadays, most bad software use holes in apps - browser, office, flash and
so on which use outgoing connections - which are NOT blocked by a
NAT-router.
So, yes, a bot connectiong to a botnet could be installed if Firefox or a
plugin like Flash, Java, Quicktime and so on has a hole and you browse on
a "bad" site.

Btw, please read about NAT, routing, current bad software etc in the
internet - this will help you understanding the concerns.

Sincerly,
Michael

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