https://blog.csdn.net/qq_31927797/article/details/81095829
#停止firewall
systemctl stop firewalld.service
#禁止firewall開機啟動
systemctl disable firewalld.service
#檢視防火牆狀态
firewall-cmd --state
#臨時關閉selunx
setenforce 0
#關閉selinux
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g'；
# 安裝iptables
yum install iptables-services