One WAN, Two LANS?

[Temido2222]

I have a 4 port NIC and 3 ports are populated. One is WAN, another is LAN (one computer cause the Charter tech killed my switch), and another one going to an Orbi (don't ask). I want them to be separate so I can monitor traffic independently. I would like the Orbi network and LAN to be able to talk to each other. LAN is on LAN and Orbi is on opt1. I have to get this done soon, since wifi is completely down. I'll set the Orbi into AP mode afterwards. How do I get this to work? Pfsense isn't giving me anything useful. I think the Orbi doesn't have an IP.

[rzlbrnft]

You have not really spent any effort on reading right?

Create firewall rule to pass traffic to the other network for each interface.  Done.

Of course the orbi has an ip, otherwise you couldn't route it.
The first google result on "orbi network ip" shows how to set it to static.

So I don't get what the problem might be?