centos7设置sshd端口，firewall，selinux设置

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
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g'；

# 安装iptables

yum install iptables-services