How to do it...

1. Navigate to Interfaces | Interface Assignments.
2. Assign a WAN interface, first by selecting the correct MAC address from the drop-down list for the WAN interface:

1. Repeat this process for the LAN interface, selecting the correct MAC address from the drop-down list for the LAN interface. If necessary, add the LAN interface to the list by following this process:
   1. Click on the Add button in the Available network ports column.
   2. Click on the name of the newly created interface in the Interfaces column (it should be OPT1).
   3. When the configuration page for the interface loads, change Description to LAN.
   4. Click on the Save button at the bottom of the page.
   5. Navigate back to Interfaces | Interface Assignments.
2. If you want to add optional interfaces, you can do so by repeating step 3 and substituting the name of the optional interface (for example, DMZ) for LAN.
3. When you are done assigning interfaces, click on the Save button.