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Prevent your server from bad bot attacks

We need some iptables rules and a file that includes ip addresses.These addresses are belong to bad bots

I use a shell script that reads ip addresses one by one from afile and block it by using iptables.

Firstly,You have to create a file.for example under root folder and it’s name is bad_bot.txt

nano /root/bad_bot.txt.Write it ip addresses that you want to block into this file.You can use my own list bad_bot.txt file

If you want it run at every system boot,please write it in rc.local file.

iptables -F

for x in $(cat /root/bad_bot.txt)
do
iptables -A INPUT -p tcp -s $x –dport 80 -j DROP
iptables -A INPUT -p tcp -s $x –dport 443 -j DROP
done