D-Link DIR-505 User Manual page 40

Section 3 - Configuration
If the router detected or you selected PPPoE, 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 the router detected or you selected PPTP, enter your PPTP
username, password, and other information supplied by your ISP.
Click Next to continue.
D-Link DIR-505 User Manual 34