Redirecting passive FTP

["Lars" <debs@utysket.dk>]

Hi

I'm having trouble with redirecting the trafic to my ftp-server. The
problem only exist when dealing with passive traffic/ connection in the
high portnumbers. So i would be very please if anyone will write thos few
lines for me..

All connections enters at: 10.0.0.2 / eth0 / $WAN_IP
FTP-server ip-address is: 172.16.0.49 / $PUBLIC
Pure-ftpd's Passive Port Range is: 37000 38000

I cleared out all the prerouting, state and others that i been trying.

        iptables -t nat -A PREROUTING -d $WAN_IP -p tcp --dport 20 -j DNAT
--to $PUBLIC:20
        iptables -t nat -A PREROUTING -d $WAN_IP -p tcp --dport 21 -j DNAT
--to $PUBLIC:21

        iptables -A INPUT -p tcp -m multiport --dport 37000-38000 -d
$PUBLIC -j ACCEPT
        iptables -A INPUT -p tcp -m multiport --dport 20,21 -d $PUBLIC -j
ACCEPT

Best Regards

/Lars