Note

Configure

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

auto eth1
        iface eth1 inet static
        address 140.113.208.202
        netmask 255.255.255.0
        gateway 140.113.208.254
        dns-nameservers 8.8.8.8
        up echo "1" > /proc/sys/net/ipv4/ip_forward
        up iptables -t nat -A POSTROUTING -s 192.168.100.0/24 -o eth1 -j MASQUERADE
        up iptables --append FORWARD -i xenbr0 -j ACCEPT
        down echo "0" > /proc/sys/net/ipv4/ip_forward
        down iptables -t nat -D POSTROUTING -s 192.168.100.0/24 -o eth1 -j SNAT --to-source 140.113.208.202

auto xenbr0
        iface xenbr0 inet static
        bridge_ports eth
        address 192.168.100.1
        netmask 255.255.255.0