iptables -A INPUT -i tun0 -p udp --dport 1194 -m state --state NEW -j ACCEPT
iptables -A INPUT -i eth0 -p udp --dport 1194 -m state --state NEW -j ACCEPT
iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE
iptables -A FORWARD -i eth0 -o tun0 -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i tun0 -o eth0 -j ACCEPT