Yes and no. Initially I configured server and ISPconfig for 192.168.55.1 behind the router while my public IP was 24.xxx.xxx.xxx. I enabled port forwarding for all of the needed portd 80,22,443,etc. but the sites were not able to resolve at all: no apache messages, no ping, nothing.
I then changed the server configuration of ISPconfig to reflect my outside IP, while my /etc/network/network configuration remained 192.168.55.1 and immediatly I was able to log-into ISPconfig from the outside world and sites all began to resolve to the /var/www wrb root, ping, etc.
Box is down right now, maybe I can bring it up after work tonight at around 6:00 P.D.T.