config interface loopback option ifname lo option proto static option ipaddr 127.0.0.1 option netmask 255.0.0.0 config interface lan option ifname eth0 option type none option proto static option ipaddr 192.168.1.1 option netmask 255.255.255.0 config interface debug option ifname usb0 option type none option proto static option ipaddr 172.18.0.18 option netmask 255.255.255.0