Http服务器如何禁止迅雷下载？

代码:

#!/bin/bash
#author:        InBi
#date:          2011-08-16
#website:       http://www.itwhy.org/2011/07-28/912.html
##################################################
MPort="80,21,2200,8080"
##################################################
modprobe nf_conntrack_ftp ports=21
modprobe nf_nat_ftp
iptables -t filter -Z;iptables -t filter -F;iptables -t filter -X
iptables -P INPUT DROP;iptables -P OUTPUT ACCEPT;iptables -P FORWARD DROP

iptables -A INPUT -p tcp -m state --state related,established -j ACCEPT
iptables -A INPUT -p tcp ! --syn -m state --state new -j DROP
iptables -A INPUT -s 127.0.0.1/32 -j ACCEPT
iptables -A INPUT -p udp --sport 53 -j ACCEPT
iptables -A INPUT -p tcp -m multiport --dports $MPort -j ACCEPT
iptables -A INPUT -p icmp --icmp-type 8 -m limit --limit 1/s --limit-burst 3 -j ACCEPT