IP Tables Help

[schverigs]

I am trying to get an IPTables script working (thanks SuperHornet). I am able to cruise the web and everything fine but it is not forwarding web requests to my web server and then displaying the site. Below is the script. Can anyone tell me what I am doing wrong.

###############################
#!/bin/sh

echo "Bringing Up The Firewall"

IPTABLES=/sbin/iptables

EXTIF="eth0"
INTIF="eth1"
WEB_SERVER="192.168.1.50"
EXT_ADD="my ip address"

echo "External Interface: $EXTIF"
echo "Internal Interface: $INTIF"
echo "Web Server Address: $WEB_SERVER"
echo "External IP Address: $EXT_ADD"

echo -en "Loading Modules"
echo "Verifying all Kernel Modules"
/sbin/depmod -a

echo -en "iptables, "
/sbin/insmod ip_tables

echo -en "ip_conntrack, "
/sbin/insmod ip_conntrack

echo -en "ip_conntrack_ftp, "
/sbin/insmod ip_conntrack_ftp

echo -en "ip_conntrack_irc, "
/sbin/insmod ip_conntrack_irc

echo -en "ip_nat, "
/sbin/insmod iptable_nat

echo -en "ip_nat_ftp, "
/sbin/insmod ip_nat_ftp

echo "Done loading Modules"

echo "Enabling Forwarding"
echo "1" > /proc/sys/net/ipv4/ip_forward

echo "Clearing Existing Rules"
$IPTABLES -P INPUT ACCEPT
$IPTABLES -F INPUT
$IPTABLES -P OUTPUT ACCEPT
$IPTABLES -F OUTPUT
$IPTABLES -P FORWARD DROP
$IPTABLES -F FORWARD
$IPTABLES -t nat -F

echo "Allow all connections out and existing and related ones in"
$IPTABLES -A FORWARD -i $EXTIF -o $INTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
$IPTABLES -A FORWARD -i $INTIF -o $EXTIF -j ACCEPT

echo "Enabling SNAT masquaade on $EXTIF"
$IPTABLES -t nat -A POSTROUTING -o $EXTIF -j MASQUERADE

echo "Web Forwarding"
$IPTABLES -t nat -A PREROUTING -i $EXTIF -p tcp \
--sport 1024:65535 -d $EXT_ADD --dport 80 \
-j DNAT --to-destination $WEB_SERVER

$IPTABLES -A FORWARD -i $EXTIF -o $INTIF -p tcp \
--sport 1024:65535 -d $WEB_SERVER --dport 80 \
-m state --state NEW -j ACCEPT

$IPTABLES -A FORWARD -i $INTIF -o $EXTIF \
-m state --state ESTABLISHED,RELATED -j ACCEPT

$IPTABLES -A FORWARD -i $EXTIF -o $INTIF \
-m state --state ESTABLISHED,RELATED -j ACCEPT

echo "Firewall Is Now Up"