Now I Can Stop DDos Attack After All

Before when they attack my site I can't stop them. Now at I can but I have to monator the server all the time and execute this program :

Code:
#!/bin/bash

#Collecting list of ip addresses connected to port 80

netstat -plan|grep :80|awk {'print $5'}|cut -d: -f 1|sort|uniq -c|sort -nk 1 > /root/iplist

#Limit the no of connections
LIMIT=5;

for ip in `cat /root/iplist |awk '{print $2}'`;do

if [ `grep $ip /root/iplist | awk '{print $1}'` -gt $LIMIT ]
then
echo "5 connection from $ip... `grep $ip /root/iplist | awk '{print $1}'` number of connections... Blocking $ip";

#Blocking the ip ...

/etc/rc.d/init.d/iptables save > /dev/null;
CHECK_IF_LOCALIP=0;
/sbin/ifconfig | grep $ip > /dev/null;
if [ $? -ne $CHECK_IF_LOCALIP ]
then
{
FLAG=0;
grep $ip /etc/sysconfig/iptables | grep DROP > /dev/null;
if [ $? -ne $FLAG ]
then
iptables -I INPUT -s $ip -j DROP;
else
echo " Ipaddress $ip is already blocked ";
fi
}
else
echo " Sorry, the ip $ip cannot be blocked since this is a local ip of the server ";
fi
fi
done
It's block any connectin that has more than 5 connections.

My problem now that when I left my pc and when I come back my server can't response.

I used this to let it work every minute :

Code:
SHELL=/bin/sh
0-59/1 * * * * root /root/ddos/blockip5.sh >
and put it here /etc/cron.d/anti-ddos.cron

Is there any advice about it ? to let work all the time not every minute. like every 5 second.

I found that when I left my pc and come back to run this script I can't login to the server I have to reboot it then log again.

This message come from support :

In the past 12 Hours we have seen a maximum of #35 mbps and an average of 12 mbps of malicious traffic being sent to your server

I am using APF and also I use DDoS-Deflate version 0.6 and evasive mod.

Any more advice ? they keep attacking me for more than 1 Month 24 hours