part.0 使用背景
公司內網服務器不能直接通過Internet上網，但為了與外網通信和同步時間等，會指定那么幾臺服務器可以訪問Internet。這里就是通過能上網的機器作為代理，制作內網使用的yum倉庫。
part.1 環境
內網dns（推薦，非必須，因為可使用IP代替）
一臺能上Internet的服務器A
不能上Internet的服務器能與A服務器通信
part.2 nginx安裝
在可連接外網的A中安裝nginx
yum install nginx
part.3 nginx配置
在主機A中添加nginx配置
$ cd /etc/nginx/conf.d$ vim proxy.conf
server { listen 80; #listen [::]:80; server_name mirrors.yourdomain.com; index index.html index.htm index.php default.html default.htm default.php; root /home/wwwroot/html; location /ubuntu/ { proxy_pass http://mirrors.aliyun.com/ubuntu/ ; } location /centos/ { proxy_pass http://mirrors.aliyun.com/centos/ ; } location /epel/ { proxy_pass http://mirrors.aliyun.com/epel/ ; } }part.4 配置yum repo 源
修改無法連接外網的主機B 的repo文件。
$ cat /etc/yum.repos.d/CentOS-7.repo
[base]name=CentOS-$releasever - Base - mirrors.yourdomain.comfailovermethod=prioritybaseurl=http://mirrors.yourdomain.com/centos/$releasever/os/$basearch/ http://mirrors.yourdomain.com/centos/$releasever/os/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=osgpgcheck=1gpgkey=http://mirrors.yourdomain.com/centos/RPM-GPG-KEY-CentOS-7#released updates [updates]name=CentOS-$releasever - Updates - mirrors.yourdomain.comfailovermethod=prioritybaseurl=http://mirrors.yourdomain.com/centos/$releasever/updates/$basearch/ http://mirrors.yourdomain.com/centos/$releasever/updates/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updatesgpgcheck=1gpgkey=http://mirrors.yourdomain.com/centos/RPM-GPG-KEY-CentOS-7#additional packages that may be useful[extras]name=CentOS-$releasever - Extras - mirrors.yourdomain.comfailovermethod=prioritybaseurl=http://mirrors.yourdomain.com/centos/$releasever/extras/$basearch/ http://mirrors.yourdomain.com/centos/$releasever/extras/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extrasgpgcheck=1gpgkey=http://mirrors.yourdomain.com/centos/RPM-GPG-KEY-CentOS-7#additional packages that extend functionality of existing packages[centosplus]name=CentOS-$releasever - Plus - mirrors.yourdomain.comfailovermethod=prioritybaseurl=http://mirrors.yourdomain.com/centos/$releasever/centosplus/$basearch/ http://mirrors.yourdomain.com/centos/$releasever/centosplus/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplusgpgcheck=1enabled=0gpgkey=http://mirrors.yourdomain.com/centos/RPM-GPG-KEY-CentOS-7#contrib - packages by Centos Users[contrib]name=CentOS-$releasever - Contrib - mirrors.yourdomain.comfailovermethod=prioritybaseurl=http://mirrors.yourdomain.com/centos/$releasever/contrib/$basearch/ http://mirrors.yourdomain.com/centos/$releasever/contrib/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contribgpgcheck=1enabled=0gpgkey=http://mirrors.yourdomain.com/centos/RPM-GPG-KEY-CentOS-7
part.5 配置hosts
$ cat /etc/hosts127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4::1 localhost localhost.localdomain localhost6 localhost6.localdomain6192.168.1.193 mirrors.yourdomain.com# 確保A 主機IP 和后面的反向代理地址
part.6 配置iptables
ping mirrors.yourdomain.com#報錯 沒有到主機的路由
此時查看B主機中的iptables信息，發現無法訪問80，可以在最前添加一條規則。
$ iptables -nvL 8155 28M ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED 0 0 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0 11761 985K INPUT_direct all -- * * 0.0.0.0/0 0.0.0.0/0 11761 985K INPUT_ZONES_SOURCE all -- * * 0.0.0.0/0 0.0.0.0/0 11761 985K INPUT_ZONES all -- * * 0.0.0.0/0 0.0.0.0/0 0 0 DROP all -- * * 0.0.0.0/0 0.0.0.0/0 ctstate INVALID11756 985K REJECT all -- * * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
$ iptables -I INPUT -p tcp --dport 80 -j ACCEPT
part.7 測試是否成功
在B主機中進行，yum makecache操作。來判斷是否能進行yum操作。
$ yum clean all$ yum makecache
總結
以上就是這篇文章的全部內容了，希望本文的內容對大家的學習或者工作具有一定的參考學習價值，如果有疑問大家可以留言交流，謝謝大家對VEVB武林網的支持。
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