fail2ban
SSH Daemon Jail
sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.d/ssh.local
[sshd]
enabled = true
ignoreip = 127.0.0.1/8 ::1,192.168.0.0/16 ::1
sudo systemctl restart fail2ban
sudo fail2ban-client status
sudo fail2ban-client status sshd