This is the same configuration I'm using and it works quite well. Like
he says, you only present one MAC address. Besides, I think this design
is more efficient since one good firewall covers your whole network. 

On Sat, 2002-02-09 at 12:09, George Toft wrote:
> Hi Lisa,
> 
> I highly recommend this configuration (bear with the ASCII art):
> 
> Cox ---- modem --- firewall --- hub/switch ---- computer
>                                    +--- computer
>                                    +--- computer
>                                    +--- computer
>                                    +--- computer
> 
> 
> The main benefit here is that your ISP only sees one MAC and
> you can have as many computers on the backside as you have
> money/electricity to support (my record was 10 computers on
> a cable modem service that only allowed one computer per IP 
> address).
>