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Brain Firewall: manage a firewall in bash on Linux

Archive · Replaced toolBrainfw has been replaced by SxWall. The script and its historical presentation remain available here.

By Christophe Casalegno on 9 January 2022 in sysadmin / network / Linux, Infosec

Hello, I said in this video that I would publish the script after reviewing it. Well, I have not had time to review it or clean it up, but it works. If you want to know more about it, I invite you to watch this video:

Watch the video on YouTube

It is very simple to use:

1) To block an IP address

./brainfw.sh block ip 192.168.1.15

2) To block an address range

./brainfw block ip 192.168.0.0/24

3) To block a country

./brainfw block country countrycode (exemple : fr pour France)

To unblock, do the same thing but use « unblock » as the parameter instead of « block ». You can download it via the following link: brainfw.sh

Have fun.

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Christophe Casalegno Brain 0verride

Keep it simple
and direct!

Brain Firewall: manage a firewall in bash on Linux

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