4. Use EHCP
Open a web browser (firefox, internet explorer etc.) on your desktop computer and enter the server's IP in the address field. You should see a page with a link to your ehcp control panel. Click that link and you should see something like:
Your username is "admin" and the password is the one you chose when you installed ehcp.
You can see more screenshots here.
Set Up Ubuntu Server With EHCP (LAMP, DNS, FTP, Mail) - Page 3