Multiple Internal/External IPS and Firewall

[edeis]

Hi,

I am a little unsure about the proper way to setup ISPcp behind a firewall. I have my setup working at home on local network, just about to take the machine and firewall to the data center (just found out my assigned IPs) and need to do the final config.

Here's my setup:
-5 public IPS
-Firewall
-ISPcp running on one virtual server instance (OpenVZ) with unique interal IP.
-In the future I will deploy a second virtual server instance on second internal ip.

When setting up ISPcp, it asks me for an IP address, should this be the internal IP address or the external IP address? Currently it is using an internal IP address for testing/setup. I am aware of the HowTo on changing IP: http://isp-control.net/documentation/how...:change_ip

How does this setting effect Apache and the DNS server? Since the firewall will be translating the public ip to internal ip, do I really need to set and public IPs in ISPcp or my machine?

Just generally confused about what and where the appropriate internal/external IPs should be set.