D-Link DIR-605 User Manual page 18

Section 3 - Configuration
Select the type of Internet connection you use and then
click Next to continue.
If you selected Dynamic, you may need to enter the
MAC address of the computer that was last connected
directly to your modem. If you are currently using that
computer, click Clone.Your.PC's.MAC.Address and then
click Next to continue.
The Host Name is optional but may be required by some
ISPs. The default host name is DLink-DIR-605D1.
D-Link DIR-605 User Manual 14