How to Connect to FiveM Server on LAN from Another Machine on LAN?

I would like to connect to the FiveM server on my LAN, from another machine on the LAN, using the server’s LAN IP (not the WAN IP).

Nothing I’ve tried seems to work.

I’d have thought this would be a no-brainer, i.e. in the FiveM client: F8 → connect 192.168.x.x (which works on the server machine but not any other)?

Could be a firewall on the server machine is blocking something - or what do you mean by it ‘doesn’t work’?