RedHat 7.x 默认不再用iptables管理防火墙，相关命令如下：
一、关闭防火墙
1. 查看防火墙状态systemctl status firewalld
2. 实时关闭（重启恢复）systemctl stop firewalld
3. 查看防火墙服务是否开机启动systemctl is-enabled firewalld
4. 永久关闭systemctl disable firewalld
二、关闭SELinux
1. 查看当前SELinux状态getenforce
2. 实时关闭（重启恢复）setenforce 0
3. 永久关闭vim /etc/selinux/config
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=permissive #修改为disabled
# SELINUXTYPE= can take one of three two values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted标签：SElinux,防火墙,RedHat7,systemctl,关闭,SELinux,policy From： https://www.cnblogs.com/scandit/p/16601064.html