安装启用firewalld防火墙 CentOS7默认的防火墙是firewalld 如果没有firewalld防火墙,可以执行yum install firewalld 命令进行安装 firewalld防火墙启用与关闭 启动systemctl start firewalld 关闭systemctl stop firewalld 查看状态systemctl status firewalld 查看状态firewall-cmd --state 开机启用systemctl enable firewalld…