A practical walkthrough for configuring a backup WAN interface on an OPNsense router using a 5G gateway as a secondary connection. Covers assigning a new interface (WAN2), enabling DHCP, verifying the gateway appears in System > Gateways, and manually switching between WAN connections by adjusting gateway priorities. Also touches on outbound NAT configuration and using curl or fast.com to verify which connection is active.
236 Impressions