sudo ./ssh_fail2ban_manage.sh              # 进入交互菜单
sudo ./ssh_fail2ban_manage.sh status       # 查看状态
sudo ./ssh_fail2ban_manage.sh logs         # 实时查看日志
sudo ./ssh_fail2ban_manage.sh unban 1.2.3.4    # 解封 IP
sudo ./ssh_fail2ban_manage.sh permblock 1.2.3.4   # 永久黑名单
sudo ./ssh_fail2ban_manage.sh permunblock 1.2.3.4 # 移除黑名单

fail2ban-client status sshd

fail2ban-client set sshd unbanip <IP>

# 添加
firewall-cmd --permanent --add-rich-rule="rule family='ipv4' source address='<IP>' reject"
firewall-cmd --reload

# 移除
firewall-cmd --permanent --remove-rich-rule="rule family='ipv4' source address='<IP>' reject"
firewall-cmd --reload