D-Link DIR-412 User Manual page 23

Section 3 - Configuration
If you selected PPPoE, enter your PPPoE username and
password. Click Next to continue.
Select Static if your ISP assigned you the IP address,
subnet mask, gateway, and DNS server addresses.
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, enter your PPTP username and
password. Click Next to continue.
D-Link DIR-412 User Manual 19