| Gateway | (or Router, CableModem, whatever) '-----+-----' | WAN | IP or Protocol | .-----+------. | OPNsense 192.168.1.1/24 '-----+------' | LAN | 192.168.1.0/24 | .-----+------. | LAN-Switch | '-----+------' | ...-----+------... (Clients/Servers)