关闭centos 7 firewalld.service
systemctl disable firewalld.service : 开机禁用firewalld.service
systemctl enable firewalld.service : 开机启动firewalld.service
关闭selinux
getenforce : 查看selinux 状态
setenforce 0 : 临时关闭selinux
setenforce 1 : 临时开启selinux
vim /etc/selinux/config : 开机禁用selinux
SELINUX=disabled