安装编辑

apt install fail2ban

配置编辑

vim /etc/fail2ban/jail.local

[sshd]               
enabled = true
port = 14213
filter = sshd
logpath = /var/log/auth.log
maxretry = 5
bantime = 12h

service fail2ban restart

fail2ban-client status sshd

/var/log/fail2ban.log