D-Link DWR-720 User Manual page 53

Section 3 - Configuration
SSH
SSH Server By default the SSH Server is disabled. Check the box to
Enable enable this function.
SSH Server Port: The SSH Server port number.
Accept Request Check this box to allow access to the web server from WAN.
From WAN:
Accept Request Check this box to allow access to the web server from LAN.
From LAN:
Click Apply to save the current configuration.
D-Link DWR-720 User Manual 49