CentOS 7 安装 fail2ban

sudo yum install epel-release
sudo yum install fail2ban
sudo systemctl enable fail2ban

sudo nano /etc/fail2ban/jail.local

[DEFAULT]
[DEFAULT]
# Ban hosts for one hour:
bantime = 3600

# Override /etc/fail2ban/jail.d/00-firewalld.conf:
banaction = iptables-multiport

[sshd]
enabled = true

sudo systemctl restart fail2ban

sudo fail2ban-client status

sudo fail2ban-client status sshd