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防火墙
解决方案:关闭firewall:systemctl stop firewalld.service
systemctl stop firewalld.service
拓展知识: 停止firewall(禁止firewall开机启动):systemctl disable firewalld.service 查看默认防火墙状态(关闭后显示notrunning,开启后显示running):firewall-cmd --state
systemctl disable firewalld.service
firewall-cmd --state