centos7已经将防火墙改为firewalld,默认的centos7 minimal是不自带firewalld，下面来安装吧
# yum install -y firewalld
# systemctl start firewalld
# systemctl enable firewalld
centos7已经将防火墙改为firewalld,默认的centos7 minimal是不自带firewalld，下面来安装吧
# yum install -y firewalld
# systemctl start firewalld
# systemctl enable firewalld
本文标题：centos7安装防火墙firewalld
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