Linux: Install fail2ban

Install fail2ban on Fedora Workstation.

[tuyen@g73jh ~]$ sudo dnf -y install fail2ban
[sudo] password for tuyen: 
Last metadata expiration check: 0:01:15 ago on Mon 07 Oct 2019 11:33:47 AM +07.
Dependencies resolved.
================================================================================
 Package                  Architecture Version               Repository    Size
================================================================================
Installing:
 fail2ban                 noarch       0.10.4-3.fc30         fedora       8.9 k
Installing dependencies:
 esmtp                    x86_64       1.2-13.fc30           fedora        52 k
 fail2ban-firewalld       noarch       0.10.4-3.fc30         fedora       9.0 k
 fail2ban-sendmail        noarch       0.10.4-3.fc30         fedora        12 k
 fail2ban-server          noarch       0.10.4-3.fc30         fedora       398 k
 libesmtp                 x86_64       1.0.6-17.fc30         fedora        60 k
 liblockfile              x86_64       1.14-3.fc30           fedora        26 k

Transaction Summary
================================================================================
Install  7 Packages

Total download size: 566 k
Installed size: 1.6 M
Downloading Packages:
(1/7): fail2ban-0.10.4-3.fc30.noarch.rpm         36 kB/s | 8.9 kB     00:00    
(2/7): fail2ban-firewalld-0.10.4-3.fc30.noarch.  36 kB/s | 9.0 kB     00:00    
(3/7): fail2ban-sendmail-0.10.4-3.fc30.noarch.r 140 kB/s |  12 kB     00:00    
(4/7): esmtp-1.2-13.fc30.x86_64.rpm             139 kB/s |  52 kB     00:00    
(5/7): liblockfile-1.14-3.fc30.x86_64.rpm       264 kB/s |  26 kB     00:00    
(6/7): libesmtp-1.0.6-17.fc30.x86_64.rpm        309 kB/s |  60 kB     00:00    
(7/7): fail2ban-server-0.10.4-3.fc30.noarch.rpm 972 kB/s | 398 kB     00:00    
--------------------------------------------------------------------------------
Total                                           366 kB/s | 566 kB     00:01     
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                        1/1 
  Installing       : fail2ban-server-0.10.4-3.fc30.noarch                   1/7 
  Running scriptlet: fail2ban-server-0.10.4-3.fc30.noarch                   1/7 
  Installing       : fail2ban-firewalld-0.10.4-3.fc30.noarch                2/7 
  Installing       : liblockfile-1.14-3.fc30.x86_64                         3/7 
  Installing       : libesmtp-1.0.6-17.fc30.x86_64                          4/7 
  Installing       : esmtp-1.2-13.fc30.x86_64                               5/7 
  Running scriptlet: esmtp-1.2-13.fc30.x86_64                               5/7 
  Installing       : fail2ban-sendmail-0.10.4-3.fc30.noarch                 6/7 
  Installing       : fail2ban-0.10.4-3.fc30.noarch                          7/7 
  Running scriptlet: fail2ban-0.10.4-3.fc30.noarch                          7/7 
  Verifying        : esmtp-1.2-13.fc30.x86_64                               1/7 
  Verifying        : fail2ban-0.10.4-3.fc30.noarch                          2/7 
  Verifying        : fail2ban-firewalld-0.10.4-3.fc30.noarch                3/7 
  Verifying        : fail2ban-sendmail-0.10.4-3.fc30.noarch                 4/7 
  Verifying        : fail2ban-server-0.10.4-3.fc30.noarch                   5/7 
  Verifying        : libesmtp-1.0.6-17.fc30.x86_64                          6/7 
  Verifying        : liblockfile-1.14-3.fc30.x86_64                         7/7 

Installed:
  fail2ban-0.10.4-3.fc30.noarch                                                 
  esmtp-1.2-13.fc30.x86_64                                                      
  fail2ban-firewalld-0.10.4-3.fc30.noarch                                       
  fail2ban-sendmail-0.10.4-3.fc30.noarch                                        
  fail2ban-server-0.10.4-3.fc30.noarch                                          
  libesmtp-1.0.6-17.fc30.x86_64                                                 
  liblockfile-1.14-3.fc30.x86_64                                                

Complete!
[tuyen@g73jh ~]$ 

Start fail2ban service, check status, and enable started automatically.

[tuyen@g73jh ~]$ sudo systemctl start fail2ban
[tuyen@g73jh ~]$ sudo systemctl status fail2ban
● fail2ban.service - Fail2Ban Service
   Loaded: loaded (/usr/lib/systemd/system/fail2ban.service; disabled; vendor p>
   Active: active (running) since Mon 2019-10-07 11:37:57 +07; 2s ago
     Docs: man:fail2ban(1)
  Process: 5174 ExecStartPre=/bin/mkdir -p /var/run/fail2ban (code=exited, stat>
 Main PID: 5175 (fail2ban-server)
    Tasks: 1 (limit: 4915)
   Memory: 10.9M
   CGroup: /system.slice/fail2ban.service
           └─5175 /usr/bin/python3 -s /usr/bin/fail2ban-server -xf start

Oct 07 11:37:57 g73jh systemd[1]: Starting Fail2Ban Service...
Oct 07 11:37:57 g73jh systemd[1]: Started Fail2Ban Service.
Oct 07 11:37:57 g73jh fail2ban-server[5175]: Server ready
[tuyen@g73jh ~]$ sudo systemctl enable fail2ban
Created symlink /etc/systemd/system/multi-user.target.wants/fail2ban.service → /usr/lib/systemd/system/fail2ban.service.
[tuyen@g73jh ~]$ 

check fail2ban's log file: /var/log/fail2ban.log

[tuyen@g73jh ~]$ sudo tail /var/log/fail2ban.log 
[sudo] password for tuyen: 
2019-10-07 11:37:57,359 fail2ban.server         [5175]: INFO    --------------------------------------------------
2019-10-07 11:37:57,359 fail2ban.server         [5175]: INFO    Starting Fail2ban v0.10.4
2019-10-07 11:37:57,362 fail2ban.database       [5175]: INFO    Connected to fail2ban persistent database '/var/lib/fail2ban/fail2ban.sqlite3'
2019-10-07 11:37:57,364 fail2ban.database       [5175]: WARNING New database created. Version '2'
[tuyen@g73jh ~]$