关闭防火墙和selinux

systemctl stop firewalld
systemctl disable firewalld

selinux NSA 增强的安全配置
临时关闭 重启linux系统后失效

setenforce 0
getenforce #关闭 disabled 或 permissive selinux 关闭

#永久关闭 重启linux系统后生效
enforcing = selinux 启动
permissive = selinux 关闭 ，提示警告信息
disabled = selinux 彻底关闭

[root@soso12 ~]# grep disabled /etc/selinux/config
# disabled - No SELinux policy is loaded.
SELINUX=disabled
You have new mail in /var/spool/mail/root