1) From the Apple menu, choose System Preferences.
2) From the View menu, choose Network.
3) Choose Built-in Ethernet from the Show pop-up menu (the "Configure" pop-up menu prior to Mac OS X 10.1).
4) Click the PPPoE tab.
5) Select the checkbox for "Connect using PPPoE."
6) Type your username in the Account Name field.
7) Type your password in the Password field. If you want all users of this computer to use the same connection method, select the checkbox for "Save password."

Tip: To have the computer automatically connect whenever you open a network application (Web browser, email, and so forth), click PPPoE Options and select the "Connect automatically when needed" checkbox.

8) Click the TCP/IP tab.
9) Choose PPP as connection type.
10)Click Apply Now.
11) Open a Web browser or other Internet (TCP/IP) application to verify your connection.