pls help on 2 public ip

[Lin Zhao]

hi all

we have a simple network

                         |-------------|
internal network---------|   freeBSD   |----------public network
          rl0/192.168.0.1|-------------|fxp0/a.b.c.1
                                             a.b.c.2?

currently 192.168.0.0/24 is natd to a.b.c.1, and i want to use another public ip
(a.b.c.2) for some special websites, such as www.abc.com. 

how can i configure the ipfw?
should i use alias ip or another nic?

i'm  a newbie to ipfw, thanks.


Lin Zhao