1.更新源yum update -y && yum install epel-release -y2.下载fail2ban 并设置开机自启yum install fail2ban -y systemctl start fail2ban systemctl enable fail2ban3.配置fail2banvi ...

一.如果无法yum update进入到 yum 的 repos 目录cd /etc/yum.repos.d/修改 centos 文件内容sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-* sed -i 's|#baseurl=http://mirror....