16D-Link DIR-826L User Manual
Section 3 - Conguration
If the router detected or you selected PPPoE, enter your PPPoE username 
and password and 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. 
If the router detected or you selected L2TP, enter your L2TP username, 
password,  and  other  information  supplied  by  your  ISP.  Click  Next  to 
continue.