Re: Bit of a thicky question...

From: Robert Moir (bofh_at_mvps.org)
Date: 06/08/03 

Date: Sat, 7 Jun 2003 23:05:56 +0100

Karsten Ohme wrote:
> "Harry" <a@abc.com> schrieb im Newsbeitrag
> news:eeS78SSLDHA.2180@TK2MSFTNGP11.phx.gbl...
>> I have a LAN with 5 win 2000 pro pc's, one has a cable modem &
>> shares this using ICS to the rest - my thicky question is if I have
>> a firewall (in this case Norton Personnel Firewall) on the cable
>> modem pc do I need it installed on the others?
>>
>> thanks
>>
>> harry
>>
>>
>
> The firewall on your router should protect you against attacks from
> the outer net and inner net. But I don't know how the ICS treats the
> connections from other computers to the internet. It is useful to
> protect each computer in the LAN. E.g. if intruders have broken the
> firewall, the PC's aren't defenceless. And another forgotten problem
> is to protect the pc from applications on itself. A trojan horse or
> also only a application may send unwanted data from the PC. For this
> reason it seems necessary to me to protect each PC against unwanted
> outgoing and incoming connection individually.

But if intruders have figured out how to break the "front" firewall and the
machines behind it have the same firewall on them then all they need to do
is just repeat what they did to break the first firewall all over again, so
I don't see what this gains you, myself. 

-- 
-- 
Rob Moir
Microsoft MVP for Windows / Security
www.robertmoir.co.uk

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