Tag: ban

Install Fail2Ban on Ubuntu to protect services

Many common adminstrative services such as VPN and SSH are exposed on known port numbers, unfortunately this makes it easy for hackers to use tools to attempt to access the systems. Use of countermeasures such as Fail2Ban can block them after a few failed attempts.

Installation Steps:

  1. sudo apt-get install fail2ban
  2. sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local
  3. sudo vi /etc/fail2ban/jail.local
  4. Update:
    destemail & sender
  5. OPTIONAL:
    Splunk:
    sudo /opt/splunkforwarder/bin/splunk add monitor /var/log/fail2ban.log -index main -sourcetype Fail2Ban

    Splunk (manual):
    sudo vi /opt/splunkforwarder/etc/apps/search/local/inputs.conf

    [monitor:///var/log/fail2ban.log]
    disabled = false
    index = main
    sourcetype = Fail2Ban

  6. sudo service fail2ban restart

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