auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

auto wg0
iface wg0 inet static
    address 172.17.255.1
    netmask 255.255.255.0
    pre-up ip link add $IFACE type wireguard
    pre-up wg setconf $IFACE /etc/wireguard/wg0.conf || ip link del $IFACE
    post-down ip link del $IFACE