https://blog.csdn.net/qq_31927797/article/details/81095829
#停止firewall
systemctl stop firewalld.service
#禁止firewall开机启动
systemctl disable firewalld.service
#查看防火墙状态
firewall-cmd --state
#临时关闭selunx
setenforce 0
#关闭selinux
vi /etc/selinux/config
将SELINUX=enforcing改为SELINUX=disabled
开启iptables
https://blog.csdn.net/orange596/article/details/78668808
centos7设置sshd端口，firewall，selinux设置
原文：https://www.cnblogs.com/littlehb/p/11082032.html