I completed installing untangle this morning on Ubuntu 8.04 and it was working just fine, for a time. I decided to switch my display manger from slim to gdm and after reboot, I have no network connectivity at all. Can't even get to local host. The host OS thinks the NICs are there and configured properly but I can ping nothing internal or external. Untangle does not see the NICs at all.

What ever have I done?