System Administration

Excellent System Utilities: Fail2ban – ban hosts that cause multiple authentication errors

Last Updated on May 28, 2022

Summary

Fail2ban is an indispensable utility to minimize the risk of a server being vandalized. When properly configured it acts quickly upon possible break-in attempts and reacts in a user-definable way.

There are a number of ways to secure a cloud server. High up on the list are to disallow root password logins, force login via SSH keys, enable automatic and unattended upgrades, install and configure logwatch, listen on only one internet protocol, and to install Fail2ban.

Website: www.fail2ban.org
Support: Manual, FAQ, GitHub Code Repository
Developer: Community-driven project originally developed by Cyril Jaquier
License: GNU General Public License v2.0

Fail2Ban is written in Python. Learn Python with our recommended free books and free tutorials.

Pages in this article:
Page 1 – Introduction / Installation
Page 2 – In Operation
Page 3 – Summary


Complete list of articles in this series:

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Fail2banBan hosts that cause multiple authentication errors
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VentoyCreate bootable USB drive for ISO, WIM, IMG, VHD(x), EFI files
WTFPersonal information dashboard for your terminal
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