How to Install and Uninstall fail2ban Package on Ubuntu 21.10 (Impish Indri)

Last updated: May 10,2024

1. Install "fail2ban" package

Here is a brief guide to show you how to install fail2ban on Ubuntu 21.10 (Impish Indri)


    
        
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                sudo apt update
            
                    
    
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                sudo apt install
            
                        
                fail2ban
            
                    
    
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2. Uninstall "fail2ban" package

In this section, we are going to explain the necessary steps to uninstall fail2ban on Ubuntu 21.10 (Impish Indri):


    
        
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                sudo apt remove
            
                        
                fail2ban
            
                    
    
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                sudo apt autoclean && sudo apt autoremove
            
                    
    
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3. Information about the fail2ban package on Ubuntu 21.10 (Impish Indri)

Package: fail2ban
Architecture: all
Version: 0.11.2-2
Priority: optional
Section: universe/net
Origin: Ubuntu
Maintainer: Ubuntu Developers
Original-Maintainer: Debian Python Team
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 2046
Depends: python3:any, lsb-base (>= 2.0-7)
Recommends: nftables | iptables, whois, python3-pyinotify, python3-systemd
Suggests: mailx, system-log-daemon, monit, sqlite3
Filename: pool/universe/f/fail2ban/fail2ban_0.11.2-2_all.deb
Size: 394422
MD5sum: f3d7ffc1694dc2bdf4123bc91657b7e1
SHA1: 47326e5d9d9a8f44ec5627d7f01f06cf9f311146
SHA256: f8379fd9afae71eeca09f2ba46d5b60f98b3ed26ae71837c75157d9bcf29bc85
SHA512: 2131c73151dcfc33aa6092d236b4c398843bebeeab418a0b592c96fd547cf4bdb95bb33b08b70ce3b8047aa58efcba5edc1336ea882de981775603c6e2dde436
Homepage: https://www.fail2ban.org
Description-en: ban hosts that cause multiple authentication errors
Fail2ban monitors log files (e.g. /var/log/auth.log,
/var/log/apache/access.log) and temporarily or persistently bans
failure-prone addresses by updating existing firewall rules. Fail2ban
allows easy specification of different actions to be taken such as to ban
an IP using iptables or hostsdeny rules, or simply to send a notification
email.
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By default, it comes with filter expressions for various services
(sshd, apache, proftpd, sasl, etc.) but configuration can be
easily extended for monitoring any other text file. All filters and
actions are given in the config files, thus fail2ban can be adopted
to be used with a variety of files and firewalls. Following recommends
are listed:
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- iptables/nftables -- default installation uses iptables for banning.
nftables is also supported. You most probably need it
- whois -- used by a number of *mail-whois* actions to send notification
emails with whois information about attacker hosts. Unless you will use
those you don't need whois
- python3-pyinotify -- unless you monitor services logs via systemd, you
need pyinotify for efficient monitoring for log files changes
Description-md5: 2aaeac0c71609eb6bfd4102c0adc7275