D-Link SharePort DIR-506L User Manual page 26

Section 3 - Configuration
If you selected PPPoE Connection, you will see the following
screen. Enter your PPPoE username, password and verify
password, then click Next to continue.
Note: Make sure to remove your PPPoE software from your computer.
The software is no longer needed and will not work through a router.
If you selected PPTP Connection, you will see the following screen.
Enter your PPTP username, password and other information
supplied by your ISP. Click Next to continue.
D-Link DIR-506L User Manual 22