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:

Essential System Tools
AlacrittyInnovative, hardware-accelerated terminal emulator
BleachBitSystem cleaning software. Quick and easy way to service your computer
bottomGraphical process/system monitor for the terminal
btop++Monitor usage and stats for CPU, memory, disks, network and processes
catfishVersatile file searching software
ClonezillaPartition and disk cloning software
CPU-XSystem profiler with both a GUI and text-based
CzkawkaFind duplicate files, big files, empty files, similar images, and much more
ddrescueData recovery tool, retrieving data from failing drives as safely as possible
dustMore intuitive version of du written in Rust
f3Detect and fix counterfeit flash storage
Fail2banBan hosts that cause multiple authentication errors
fdupesFind or delete duplicate files
FirejailRestrict the running environment of untrusted applications
GlancesCross-platform system monitoring tool written in Python
GPartedResize, copy, and move partitions without data
GreenWithEnvyNVIDIA graphics card utility
gtopSystem monitoring dashboard
gWakeOnLANTurn machines on through Wake On LAN
hyperfineCommand-line benchmarking tool
HyFetchSystem information tool written in Python
inxiCommand-line system information tool that's a time-saver for everyone
journalctlQuery and display messages from the journal
kmonManage Linux kernel modules with this text-based tool
KrusaderAdvanced, twin-panel (commander-style) file manager
NmapNetwork security tool that builds a "map" of the network
nmonSystems administrator, tuner, and benchmark tool
nnnPortable terminal file manager that's amazingly frugal
petSimple command-line snippet manager
PingnooGraphical representation for traceroute and ping output
ps_memAccurate reporting of software's memory consumption
SMCMulti-featured system monitor written in Python
TimeshiftReliable system restore tool
QDirStatQt-based directory statistics
QJournalctlGraphical User Interface for systemd’s journalctl
TLPMust-have tool for anyone running Linux on a notebook
UnisonConsole and graphical file synchronization software
VeraCryptStrong disk encryption software
VentoyCreate bootable USB drive for ISO, WIM, IMG, VHD(x), EFI files
WTFPersonal information dashboard for your terminal
Subscribe
Notify of
guest

This site uses Akismet to reduce spam. Please read our Comment FAQ before posting a comment.

0 Comments
Oldest
Newest Most Voted
Inline Feedbacks
View all comments