D-Link DIR-505 User Manual page 42

Section 3 - Router Mode
Primary/
Secondary The DNS server information will be supplied by your ISP
DNS Server:
(Internet Service Provider.)
MTU:
If you experience connection issues, you may need to
change the MTU setting for optimal performance with your
speciic ISP. 1492 is the default MTU.
MAC Address:
If your ISP requires you to enter a MAC address, ill it in here.
You can click the Clone MAC button to enter your current
computer's MAC address.
D-Link DIR-505 User Manual 37