防火墙配置

添加端口到防火墙：
firewall-cmd --zone=public --add-port=6380/tcp --permanent                   elastic       apm_system
firewall-cmd --zone=public --remove-port=9200/tcp --permanent  # 关闭端口
查看端口是否添加到防火墙
firewall-cmd --query-port=6380/tcp
重启防火墙
firewall-cmd --reload
查看防火墙状态
systemctl status firewalld
设置firewall开机启动
systemctl enable firewalld
禁止firewall开机启动
systemctl disable firewalld