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

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Message-Id: <B017A7D0-BE05-4416-A07A-8F39F7D9DC9A@gmail.com>
Date: Tue, 22 Sep 2009 17:09:22 -0400
From: "G. D. Fuego" <gdfuego@...il.com>
To: john s <rwnin.security@...il.com>
Cc: "full-disclosure@...ts.grok.org.uk" <full-disclosure@...ts.grok.org.uk>
Subject: Re: Dumb question: Is Windows box behind a router
	safe ?


On Sep 22, 2009, at 3:18 PM, john s <rwnin.security@...il.com> wrote:

> On Tue, Sep 22, 2009 at 2:01 PM, G. D. Fuego <gdfuego@...il.com>  
> wrote:
>>
>> On Sep 22, 2009, at 2:29 PM, Steven Anders <anderstev@...il.com>  
>> wrote:
>>>
>>> I have always thought that having a computer behind the router
>>> (since router has firewall) is generally safe, but I would love to
>>> hear insights or thoughts.
>>
>> Nope.  A firewall should protect you against inbound connection
>> attempts only.
>>
>
> A well configured firewall segregates and monitors ingress and egress
> traffic on a network segment.  Controlling outbound connectivity
> doesn't stop internal host app-level exploitation, but it can mitigate
> post-exploit damages and can also possibly provide an alert to the
> compromise...

How many home users do you know with egress filtering enabled?

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