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systemctl stop firewalld.service systemctl disable firewalld.service
开放端口：
firewall-cmd --zone=public --add-port=80/tcp --permanent firewall-cmd --reload
关闭端口：
firewall-cmd --zone=public --remove-port=8082/tcp --permanent
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CentOS 7关闭firewall防火墙
systemctl stop firewalld.service systemctl disable firewalld.service
开放端口：
firewall-cmd --zone=public --add-port=80/tcp --permanent firewall-cmd --reload
关闭端口：
firewall-cmd --zone=public --remove-port=8082/tcp --permanent
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