ip address add 10.255.23.2/30 dev r32
ip link set dev r32 up
ip address add 10.255.13.2/30 dev r31
ip link set dev r31 up
ip address add 10.20.0.1/24 dev lan0
ip link set dev lan0 up
ip address add 10.255.0.3/32 dev lo
ip link set dev lo up
sysctl -w net.ipv4.ip_forward=1
