D-Link DIR-822 User Manual page 22

Section 3 - Getting Started
Create a Wi-Fi password (between 8-63 characters). Your wireless clients
will need to have this passphrase or key entered to be able to connect
to your wireless network.
Click Next to continue.
In order to secure the router, please enter a new password. You will be
prompted for this password every time you want to use the router's web
configuration utility. Click Next to continue.
At the end of the wizard, you will be presented with a final summary of
your settings. Click Finish to close the wizard.
D-Link DIR-822 User Manual 18