Tell you how to setup D-Link /800/1600 .
Step 1: Open a web browser and type the IP address of the firewall into the address bar (default is 192.168.1.1). Press Enter.
Step 2: Click on the plus sign (+) next to Interfaces and select
Step 3: Click the Add button and Select PPPoE Tunnel.
Step 4: Create the PPPoE Tunnel as Followed:
Step 5: Click OK.
Step 6: Click on the plus sign next to Rules select IP Rules and Select lan_to_wan
Step 7: Right click the drop_smb-all and select Edit.
Step 8: Change the Destination Interface to your Created PPPoE Interface and Click OK.