Centos 关闭防火墙和iptables
关闭防火墙：
systemctl status firewalld.service
systemctl stop firewalld.service
systemctl disable firewalld.service
firewall-cmd --state关闭iptables：
yum install iptables-services
systemctl status iptables.service
systemctl stop iptables.service
systemctl disable iptables.service
cd /etc/sysconfig
mv /etc/sysconfig/iptables /etc/sysconfig/iptables.bak
mv /etc/sysconfig/iptables-config /etc/sysconfig/iptables-config.bak
touch /etc/sysconfig/iptables
touch /etc/sysconfig/iptables-config
reboot
