To do port forwarding, you must first decide what ports you want forwarded to which machine. Suppose your machine's IP address is 192.168.1.20 (It is best to give this machine a static IP address) and you want to forward VNC ports to it.1. Make sure that the WA1003a modem/router is in pppoe mode.2. Go to Advanced->LAN Clients. Add your machine as a static client. You need to enter the IP address of the machine, mac address of the machine's LAN card, and the machine's name.3. Go to Advanced->Port Forwarding.4. Select the machine to which you want to forward the ports to (in our example, it is 192.168.1.20).5. Next, from the radio buttons on the left side of this configuration web page, select the application for which you want to forward the ports. Example: to forward VNC ports, click on the Apps radio button, then select VNC from the application that are listed in the table, then click on Add button on the right hand side of this table. To see which ports are being forwarded, click on View button at the bottom of the table.6. Click Apply button.7. Go to Tools->System Commands (or something like this). Then click on "Save Settings" (or Save ALL) and then on Restart to save the settings and to restart the modem.Of course, for this to work, if you have any firewall on the machine to which you are forwarding the ports, you must allow the connections on those ports. In Zone Alarm for example, you must have allowed VNC to access the internet and to act as a server for the above example to work.If you want to port forward your own custom ports, you can specify those using the "User" radion button in the Port Forwarding page of the WA1003a configuration.GL.