ralp的nginx从入门到跑路---05 nginx的代理服务（正向代理）

Nginx 代理服务概述

1.porxy server 代理服务器（Proxy Server），其功能就是代理网络用户去取得网络信息。形象的说： 它是网络信息的中转站。代理服务器就好象一个大的 Cache，这样就能显著提高浏览速度和效率。更重要的是：Proxy Server（代理服务器）是 Internet 链路级网关所提供的一种重要的安全功能，主要的功能有：

突破自身 IP 访问限制，访问国外站点。教育网、过去的 169 网等提高访问速度隐藏真实 IP：上网者也可以通过这种方法隐藏自己的 IP，免受攻击。

代理服务器分类

HTTP 代理VPN 代理反向代理FTP 代理POP3 代理

最为常见的就是 HTTP 代理、vpn 代理、反向代理这三类

正向代理与反向代理区别

正向代理代理的对象是客户端

反向代理代理的对象是服务端

Nginx 代理配置语法

Syntax: proxy_pass URL; Default: — Context: location

Proxy 常见配置项具体配置如下:

proxy_redirect default; proxy_set_header Host $http_host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_connect_timeout 30; proxy_send_timeout 60; proxy_read_timeout 60; proxy_buffer_size 32k; proxy_buffering on; proxy_buffers 4 128k; proxy_busy_buffers_size 256k; proxy_max_temp_file_size 256k;

正向代理服务器的 具体配置：

server { listen 8003; resolver 114.114.114.114 8.8.8.8; location /{ proxy_pass http://$http_host$request_uri; } } // proxy_pass http://$http_host$request_uri; 表示 代理服务器的访问IP，上网的服务器要访问什么网站，这里就访问啥。

在一个服务器上的浏览器设置代理

然后任意访问 同时查看代理服务器的日志文件

[root@ralph conf.d]# tail -f /var/log/nginx/access.log 14.127.120.152 - - [02/Oct/2019:17:56:53 +0800] "GET http://imop.i.51rs.cn/newts/dl/dot0.png HTTP/1.1" 200 173 "http://t.imop.com/" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0" "-" 14.127.120.152 - - [02/Oct/2019:17:56:53 +0800] "GET http://imop.i.51rs.cn/newts/dl/loginbg.jpg HTTP/1.1" 200 8531 "http://t.imop.com/" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0" "-" 14.127.120.152 - - [02/Oct/2019:17:56:53 +0800] "GET http://imop.i.51rs.cn/newts/dl/iptbg.png HTTP/1.1" 200 410 "http://t.imop.com/" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0" "-" 14.127.120.152 - - [02/Oct/2019:17:56:53 +0800] "GET http://imop.i.51rs.cn/newts/dl/cl.jpg HTTP/1.1" 200 71322 "http://t.imop.com/" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0" "-" 14.127.120.152 - - [02/Oct/2019:17:56:53 +0800] "GET http://imop.i.51rs.cn/newts/dl/rtabbg.png HTTP/1.1" 200 1715 "http://t.imop.com/" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0" "-" 14.127.120.152 - - [02/Oct/2019:17:56:53 +0800] "GET http://imop.i.51rs.cn/imop/common/newimages/b_logo.png HTTP/1.1" 200 2236 "http://t.imop.com/" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0" "-" 14.127.120.152 - - [02/Oct/2019:17:56:53 +0800] "GET http://imop.i.51rs.cn/imop/common/newimages/b_bg6.png HTTP/1.1" 200 2893 "http://t.imop.com/" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0" "-" 14.127.120.152 - - [02/Oct/2019:17:56:53 +0800] "GET http://imop.i.51rs.cn/imop/common/newimages/b_bg5.png HTTP/1.1" 200 2870 "http://t.imop.com/" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0" "-" 14.127.120.152 - - [02/Oct/2019:17:56:53 +0800] "GET http://imop.i.51rs.cn/newts/dl/pop_btn.jpg HTTP/1.1" 200 1909 "http://t.imop.com/" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0" "-" 14.127.120.152 - - [02/Oct/2019:17:56:53 +0800] "GET http://imop.i.51rs.cn/newts/dl/cr.jpg HTTP/1.1" 200 51244 "http://t.imop.com/" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0" "-" 14.127.120.152 - - [02/Oct/2019:17:57:36 +0800] "GET http://tieba.baidu.com/f?kw=