D-Link DIR-820L User Manual page 49

8. Next to RADIUS Server Port, enter the port you are using with
your RADIUS server. 1812 is the default port.
9. Next to RADIUS Server Shared Secret, enter the security key.
10. Check the box by MAC Address Authentication if you would like
MAC Address authentication.
11. Click Advanced to enter settings for a secondary RADIUS Server.
12. Click Save Settings to save your settings.
D-Link DIR-820L User Manual 44