安装iptables yum install iptables-services 直接报错: yum install iptables-services plugins: fastestmirrorDetermining fastest mirrorshttp://mirror.centos.org/centos/7.5.1804/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not FoundTrying other mirror.To address this issue please refer to the below wiki article 。。。。。。 [Errno 14] HTTP Error 404 - Not Found 1.尝试清理yum缓存数据;yum clean all 2.更新yum仓库,报错;yum makecache fast 这套repo 通吃华为Centos 系统。