Astaro 110/120 not talking

I was working on an Astaro 110/120, and I think I disabled the internal side connection by clicking on the RED square next to the connection. It won't talk to me any longer.

I power cycled it, but apparently it hangs onto that setting through a power cycle.

I connected a monitor and keyboard, and I'm able to login as root.

Is there something I can type in order to get the unit to talk to me again?

I have disconnected the unit and had to reconnect it on my bench. From memory, I think eth0 was the LAN, and eth1 was the WAN.

Any help would be appreciated.