static nat routing...What you are looking to do is generally referred to as static NAT or port forwarding. The Cube 2 uses the older ipfwadm as the firewall. I'm not sure whether ipfw has the static NAT capability or not. The newer ipchains does. If ipfwadm can do it, you would have to manually modify the scripts which would most likely conflict with the GUI and possibility break it.
Sun Cobalt and other Linux administration by Zeffie
A Sun Cobalt and Linux Specialist Since 1999
Sun Cobalt Repairs, Development, and Maintenance.
Home of the Worlds Largest Collection of Sun Cobalt Updates!
Sun Cobalt Spam Filter, Security, Firewall, Anti Virus Products.
734-454-9117 US Toll Free 800-231-4459
Copyright 2009 by Electronic Consultants Inc.