1. Navigate to Firewall | Rules.
2. Since we want to create a rule that applies to the LAN interface, click on the LAN tab:

3. The table on the page will list all the current rules for the LAN interface. There will be two Add buttons below the table. Since we want to create a rule that will be appended to the top of the table, click on the Add button with the up arrow.

4. Set the action in the Action drop-down menu to Block:

5. You can leave Interface set to LAN, Address Family set to IPv4, and Protocol set to TCP.
6. In Destination, select Single host or alias in the drop-down menu and enter 207.58.150.178 in the adjacent text field:

7. In the Extra Options section, enter a description in the Description text field.
8. When you are done, click on the Save button.
9. Click on the Apply Changes button to reload the firewall rules.