Reboot your Macintosh if you just placed MacTCP in your control panels.
Select MacTCP from the Control Panels located in the Apple Menu.
Select the PPP icon in the MacTCP window similar to the window below.
Click on the More... button.
Fill in the following information to match the window below. It may be necessary to select the Manually button to allow you to make some of the IP number changes.
Double check to be sure all the numbers where correctly entered. Click on the OK button.
The IP address should be 192.0.0.0, if not press the More... button and select Manually and press the OK button. You should now be able to edit the IP address to 192.0.0.0 Click on the More... button and reset to the Server button.
Close the MacTCP control panel.
Reboot your Macintosh.
MacTCP should now be configured.