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
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
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/12707874/viewspace-2141432/ ，如需转载，请注明出处，否则将追究法律责任。
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