PORTFWIP="192.168.0.5"
PORT=6881
while [ $PORT -le 6889 ]
do
$IPTABLES -A FORWARD -i $EXTIF -o $INTIF -p tcp --dport $PORT -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
$IPTABLES -A PREROUTING -t nat -p tcp -d 65.185.172.110 --dport $PORT -j DNAT --to $PORTFWIP:$PORT
PORT=$((PORT+1))
done
$IPTABLES -A FORWARD -i $EXTIF -o $INTIF -p tcp --dport 42882 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
$IPTABLES -A PREROUTING -t nat -p tcp -d 65.185.172.110 --dport 42882 -j DNAT --to 192.168.0.5:42882