Add/Update address objects in Sonicwall for RDP whitelisting (Gen 7)

Login to the website for the Sonicwall (often https://192.168.1.1 from inside the LAN)

Go to Objects (on the top menu)

Go to Match Objects -> Addresses (on the left menu)

If you are adding a new address object, click on Add.

If you are editing an existing object, find and hover over the existing address object and click on the pencil (Edit).

Make sure to full out the name and the IP address and select WAN for the Zone Assignment.'

Click Save.

If you are editing an existing object, you are now done.

Now go to the Address Groups tab.

Hover the mouse over Remote Admin Addresses (or similar) and click on the pencil (Edit).

On the left side, select the new address object, click the single right arrow and then click Save.