To reconfigure the NetWinder's network settings, you need to use the nwconfig command. Type nwconfig at the number sign prompt and press enter.
nwconfig will appear and give you detailed help on the information you need to provide. When finished, press the F10 key to save and exit. Finally, press the orange reset button on the top of your NetWinder twice quickly to reboot it with the new settings.
You should now be able to access the web-based configuration system with your web browser once again.