@Jonathan_Pitts pointed out that I can expand my Balance 20X with a USB-Ethernet adapter to get a second WAN. So I had to immediately investigate, and pull this out into its own topic.
I plugged a generic one in, and it shows up in Status:
But I don’t see a new entry in the “Network” settings to configure it.
Do I have to configure something else? The link isn’t currently active as there is nothing plugged into it. Is that expected behavior?