D-Link DIR-412 User Manual page 22

Section 3 - Configuration
Select the type of Internet connection you will use on your
WAN connection. If using the DIR-412 for the first time, leave
the Skip 3G Configuration box unchecked. Check the Skip
3G Configuration box if you do not want to configure the
router's 3G connection.
Click Next to continue.
If you selected Dynamic IP Address, 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 Copy 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 DIR-412.
D-Link DIR-412 User Manual 18