iptables --flush
iptables --table nat --flush
iptables --delete-chain
iptables --table nat --delete-chain

iptables --table nat --append POSTROUTING --out-interface tun0 -j MASQUERADE
iptables --append FORWARD --in-interface tun0 -j ACCEPT
echo 1 > /proc/sys/net/ipv4/ip_forward

iptables -t nat -A PREROUTING -p tcp -m tcp --dport 554 -j DNAT --to-destination 10.9.0.6
iptables -t nat -A PREROUTING -p udp -m udp --dport 554 -j DNAT --to-destination 10.9.0.6
iptables -t nat -A POSTROUTING -d 10.9.0.6 -p tcp -m tcp --dport 554 -j MASQUERADE
iptables -t nat -A POSTROUTING -d 10.9.0.6 -p udp -m udp --dport 554 -j MASQUERADE
iptables -I FORWARD -i tun0 -p udp -d 10.9.0.6 --dport 554 -j ACCEPT
iptables -I FORWARD -i tun0 -p tcp -d 10.9.0.6 --dport 554 -j ACCEPT
iptables -t nat -I PREROUTING -i tun0 -p tcp --dport 554 -j DNAT --to-destination 10.9.0.6
iptables -t nat -I PREROUTING -i tun0 -p udp --dport 554 -j DNAT --to-destination 10.9.0.6