Connection problems over LAN - port related?

We have Normcore running through Unity. Everything works when we use the university wifi network, but when we use our LAN, it fails to connect to the normcore servers. In order to fix the problem we need to know something about how Normcore is communicating. I know it uses WebRTC and a mixture of TCP and UDP. But which ports?
Any information or advice greatly appreciated.

Normcore uses TCP port 3000 to communicate with the service to create a room server, and any port between 10000-50000 for actual UDP communication while connected to a room server. Our public servers use a wide range of ports because servers are hosted on shared machines, but with Normcore Private you can customize this port range.