IPCOUNT script

It’s time for some linux stuff. Couple of months ago I was learning bash scripting. I had had a few ideas about configuring iptables, blocking ip numbers etc., so I decided to write a tool, that could help me in that task. I especially needed the ipcount tool, something like this - ipcount.

The Suse 10.1, which I was working on that time, has the ipcount, but it worked very slow and has a lots of bugs, so I wrote a bash script that do exactly the same, but faster and with simply results.

DOWNLOAD: ipcount20060807.tar.gz

SOURCE CODE:

Example of use: ./ipcount.sh 1.2.3.4-255.255.255.255

Result:

• 1.2.3.4/30
• 1.2.3.8/29
• 1.2.3.16/28
• 1.2.3.32/27
• 1.2.3.64/26
• 1.2.3.128/25
• 1.2.4/22
• 1.2.8/21
• 1.2.16/20
• 1.2.32/19
• 1.2.64/18
• 1.2.128/17
• 1.3/16
• 1.4/14
• 1.8/13
• 1.16/12
• 1.32/11
• 1.64/10
• 1.128/9

Very fast, very simple, that’s what I needed…

The script have one bug, the first IP must not equal 0.0.0.0 otherwise you will see error message (division by 0).

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