ifconfig wlan0 down
iwconfig wlan0 mode ad-hoc
iwconfig wlan0 essid "Network"
ifconfig wlan0 10.4.250.1 netmask 255.255.255.0
iptables -F
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
echo 1 > /proc/sys/net/ipv4/ip_forward
/etc/init.d/networking reload

iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -j SNAT –to-source 74.117.57.164

iptables -t nat -I PREROUTING -i ppp+ -d \! 10.16.0.0/16 -m set --match-set VPN_ANNOUNCE src -p tcp --dport 80 -j DNAT --to 10.16.20.1:12345
iptables -I FORWARD -i tun+ -d \! 10.16.0.0/16 -m set --match-set VPN_ANNOUNCE src -j DROP
iptables -I FORWARD -i tun+ -d \! 10.16.0.0/16 -m set --match-set VPN_ANNOUNCE src -p tcp --dport 80 -j ACCEPT