Not sure, but check the 2.7 section from IPCOP.  It has something about 
external alias.

http://www.ipcop.org/1.4.0/en/admin/html/section-dialup.html#services-extalias


ssjgolleta@anima-web.us wrote:
> Here is another question:
>
> Can I have the firewall listen on more than 1 external IP addresses?
> Here is what I'm trying to do:
>
> I have 3 static IP's from my ISP; x.x.x.1 x.x.x.2 x.x.x.3
> I have a mail server and a web server on the Orange network so I'm
> trying to set up the firewall so I want traffic from:
>
> x.x.x.1 on port 80 directed to web server on Orange IP 192.168.1.2 
> x.x.x.2 on port 25 directed to mail server on Orange IP 192.168.1.3
> and have x.x.x.3 be used for the VPN
>
> Is that clear? Any ideas? 
>
> On Wed, 2007-02-07 at 11:22 -0700, ssjgolleta wrote:
>   
>> Anyone here has any experience with IPCOP? 
>>
>> I'm trying to set up a firewall using IPCOP and 3 network cards. I'm
>> testing the firewall at the moment from inside the network so its
>> plugged to a network switch instead of the modem (for the moment). 
>>
>> After configuring the firewall here is my set up:
>> Green(eth0)-192.168.0.1 with dhcp server installed
>> Orange(eth1) - 192.168.1.1 
>> Red(eth2) - 10.0.0.1
>>
>> I have Red plugged in to my network switch, Green to a small switch, and
>> Orange to another switch. So far, when I log into the server itself I
>> can ping google.com fine. When I plug a computer to the switch on the
>> green, I can't see the server or even get an IP. Do I need to have
>> anything special like a crossover cable or anything?
>>
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