D-Link DNS-323 - Network Storage Enclosure NAS Server User Manual page 82

Section 3 - Configuration
You will now see a series of pop-up warning
messages that look similar to these depicted on
the right. Click the buttons which are marked with a
red frame to continue. Click the Or you can add an
exception... button.
Click the Add exception... button
Click the Get Certificate button.
D-Link DNS-33 User Manual