D-Link DIR-505 User Manual page 35

Section 3 - Router Mode
Select your Internet connection type and click Next to continue.
If you selected DHCP Connection, you will see the following
screen. If your ISP requires you to enter a MAC address and Host
Name, ill them in here. You can click the Clone MAC button to
enter your current computer's MAC address.
Click Next to continue.
D-Link DIR-505 User Manual 30