Heh, it probably is very simple. 🙂 Unfortunately, I’m the host, as I built both of these machines (which are hosted at our colo) and have pretty much forgotten everything I learned 2 years ago about getting it running.
They are in the same rack, adjacent IP addresses (old one FC4 upgraded in place from Red Hat 9, new one Fedora 8)
Still, this is good information, as it gives me an idea of where to start.