sudo iptables -A FORWARD -o usb0 -i eth0 -s 10.0.0.0/24 -m conntrack --ctstate NEW -j ACCEPT
sudo iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
sudo iptables -A POSTROUTING -t nat -j MASQUERADE
sudo iptables-save | sudo tee /etc/iptables.sav
add "iptables-restore < /etc/iptables.sav" in /etc/rc.local
