WAN / Internet : : Telekom Austria A1 Breitband Pro Business : .-----+-----. | Cisco Router/Modem der Telekom | '-----+-----' | WAN | IP or Protocol | .-----+------. | OPNsense '-----+------' | LAN | 192.168.0.3/24 | .-----+------. | LAN-Switch | '-----+------' | ...-----+------... (Clients/Servers)