Linux关闭防火墙（centos）
1查看防火墙状态
systemctl status firewalld
service iptables status
2暂时关闭防火墙
systemctl stop firewalld
service iptables stop
3永久关闭防火墙
systemctl disable firewalld
chkconfig iptables off
4重启防火墙
systemctl enable firewalld
service iptables restart
5禁用防火墙
systemctl stop firewalld
6设置开机启动
systemctl enable firewalld
7停止并禁用开机启动
sytemctl disable firewalld
8重启防火墙
firewall-cmd --reload
