Hmmmm. Let me see here. You have this setup:

INTARWEB-->CABLE MODEM-->LINUX BOX-->HUB-->YOU

The first thing to check is to see if your cable modem is operating in bridge mode. If it is, the port forwarding is done on your linux box. If your cable modem is NATing, you first have to setup port forwarding on the cable modem. Effectively, if it is NATing, you're getting an entire DMZ that sits between your cable modem and linux box. Now, if you have the webserver parked behind the linux box, you're going to do double port forwarding (if your cable modem is NATing), which I personally never tried because it's assinine to begin with. Anyway, one of these two scenarios will get you going.

--TH13