An introduction to Linux network routing (David Both)
/usr/bin/ip link set dev tun0 up mtu 1500
Enable and configure the TUN adapter at tun0
.
/usr/bin/ip addr add dev tun0 192.121.66.237/26 broadcast 192.121.66.255
Add an address to tun0
and set its broadcast domain.
/usr/bin/ip route add 192.121.66.131/32 via 192.168.2.1
Add a route
/usr/bin/ip route add 0.0.0.0/1 via 192.121.66.193
/usr/bin/ip route add 128.0.0.0/1 via 192.121.66.193
0.0.0.0/1 128.0.0.0/1 192.121.66.255 192.121.66.237/26 192.121.66.131/32 192.121.66.193 192.168.2.1