Block Incapsula Web Crawler using IPTables in Linux


In my previous post, I was doing experiment by blocking crawler from Incapsula with NGINX “deny” which actually it’s doesn’t give solution for me. I don’t know if my code is wrong or NGINX can’t doing subnet blocking correctly. Because I was going into NGINX documentation and follow the article but that drive me into some unlikely result.

So, I try with more familiar way called “iptables”. I use debian for this example. So, basically iptables is available for Linux Distros. Just make sure your server have it installed. Then here is the list:

blockips.conf:

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199.83.132.0/24
199.83.128.0/24
199.83.132.0/24
198.143.34.0/24
198.143.33.0/24
149.126.76.0/24
198.143.32.0/24
149.126.75.0/24
103.28.248.0/24
198.143.32.0/24
149.126.73.0/24
149.126.75.0/24
149.126.76.0/24
149.126.77.0/24
149.126.78.0/24
198.143.32.0/24
198.143.33.0/24
198.83.128.0/24
198.83.132.0/24
198.83.131.0/24
149.126.70.0/24
149.126.71.0/24
149.126.72.0/24
198.143.32.0/24
149.126.70.0/24
149.126.72.0/24
198.143.30.0/24
198.143.31.0/24
198.143.32.0/24
198.143.33.0/24
103.28.248.0/24
149.126.70.0/24
149.126.71.0/24
149.126.72.0/24
198.143.32.0/24
198.143.33.0/24
198.83.128.0/24
198.83.129.0/24
198.83.130.0/24
198.83.132.0/24
212.199.180.0/24
198.143.33.0/24
103.28.248.129
103.28.248.2
149.126.73.231
149.126.73.232
149.126.75.2
149.126.76.193
149.126.78.2
198.143.32.129
198.143.32.161
198.143.32.193
198.143.32.2
198.143.33.129
198.143.33.161
198.143.33.193
198.143.33.2
198.143.34.129
198.143.34.161
198.143.34.193
198.143.34.2
199.83.128.231
199.83.128.232
199.83.132.129
199.83.132.2
149.126.76.193
149.126.76.2
103.28.248.129
103.28.248.2
149.126.73.231
149.126.73.232
149.126.75.2
149.126.76.193
149.126.78.2
198.143.32.129
198.143.32.161
198.143.32.193
198.143.32.2
198.143.33.129
198.143.33.161
198.143.33.193
198.143.33.2
198.143.34.129
198.143.34.161
198.143.34.193
198.143.34.2
199.83.128.231
199.83.128.232
199.83.132.129
199.83.132.2
103.28.248.129
103.28.248.2
149.126.73.231
149.126.73.232
149.126.75.2
149.126.76.129
149.126.76.193
149.126.76.2
149.126.78.2
198.143.32.129
198.143.32.161
198.143.32.193
198.143.32.2
198.143.33.129
198.143.33.161
198.143.33.193
198.143.33.2
198.143.34.129
198.143.34.161
198.143.34.193
198.143.34.2
199.83.128.231
199.83.128.232
199.83.132.129
199.83.132.2
103.28.248.129
103.28.248.2
149.126.73.231
149.126.73.232
149.126.75.2
149.126.76.129
149.126.76.193
149.126.76.2
149.126.78.2
198.143.32.129
198.143.32.161
198.143.32.193
198.143.32.2
198.143.33.129
198.143.33.161
198.143.33.193
198.143.33.2
198.143.34.129
198.143.34.161
198.143.34.193
198.143.34.2
199.83.128.231
199.83.128.232
199.83.132.129
199.83.132.2
103.28.248.129
103.28.248.2
149.126.73.231
149.126.73.232
149.126.75.2
149.126.76.129
149.126.76.193
149.126.76.2
149.126.78.2
198.143.32.129
198.143.32.161
198.143.32.193
198.143.32.2
198.143.33.129
198.143.33.161
198.143.33.193
198.143.33.2
198.143.34.129
198.143.34.161
198.143.34.193
198.143.34.2
199.83.128.231
199.83.128.232
199.83.132.129
199.83.132.2
103.28.248.129
103.28.248.2
149.126.73.231
149.126.73.232
149.126.76.193
149.126.78.2
198.143.32.193
198.143.32.2
198.143.33.161
198.143.34.161
198.143.34.193
199.83.128.231
199.83.128.232
199.83.132.129
199.83.132.2

I assume you put this script under “/root/blockips.conf”. So, to execute Iptables to blocking IP by reading from files, create this little script called “block.sh”:

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#!/bin/sh
BLOCKED_IP="/root/blockips.conf"
if [ -f $BLOCKED_IP ]; then
        while read BLOCKED_IP; do
                iptables -A INPUT -i eth0 -s $BLOCKED_IP -j DROP
                iptables -A OUTPUT -o eth0 -d $BLOCKED_IP -j DROP
        done < $BLOCKED_IP
fi

Don’t forget to make it executable by “chmod a+x block.sh”


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