$ sudo yum --y install fail2ban $ sudo apt install fail2ban $ sudo systemctl enable fail2ban $ sudo systemctl start fail2ban $ sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local ignoreip = 127.0.0.1/8 ignoreip = 127.0.0.1/8 192.168.1.55 192.168.1.89 $ sudo vi /etc/fail2ban/jail.d/sshd.local $ sudo systemctl restart fail2ban $ sudo fail2ban-client set sshd unbanip 192.168.1.96