Add LAN Interface From WebGUI

[amuckart]

I suspect this is a real corner-case situation, but I'm curious as to why it's not possible.

I've been testing OPNcentral, and as part of that I built an OPNcentral VM. Not knowing at the time how OPNcentral works I created the VM with only a WAN interface because it's a dedicated management device that doesn't need any other interfaces.

Unfortunately to be able to sync firewall rules to my managed firewalls the OPNcentral device needs to have the same interfaces as all the managed firewalls, so I started adding them.

I found there is no way to add a LAN interface via the WebGUI. The only way to do it is via the initial setup menus, but doing that breaks the WAN interface.

Am I missing something that would allow me to create the LAN interface without disrupting the WAN interface, or is this just not possible because who in their right mind would set up a firewall with only one interface?