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#查看防火墙状态#

systemctl status firewalld

#关闭防火墙#

systemctl stop firewalld

#打开防火墙#

systemctl start firewalld

#添加开放2375端口#

firewall-cmd --add-port=2375/tcp --permanent

#重载入添加的端口#

firewall-cmd --reload

#查询2375端口是否开启成功#

firewall-cmd --query-port=2375/tcp