/sbin/iptables -t nat -N NAT_DESTINATION
/sbin/iptables -t nat -N NAT_SOURCE
/sbin/iptables -t nat -A PREROUTING -j NAT_DESTINATION
- /sbin/iptables -t nat -A POSTROUTING -j NAT_SOURCE
+ /sbin/iptables -t nat -I POSTROUTING 2 -j NAT_SOURCE
# upnp chain for our upnp daemon