nginx正向代理配置详解

一、nginx正向代理介绍及配置

1、环境介绍

代理服务器系统环境为：centos

nginx代理服务器为：192.168.10.10

测试客户端为局域网内任意windows电脑或Linux电脑

2、正向代理简介

nginx不仅可以做反向代理，还能用作正向代理来进行上网等功能。如果把局域网外的Internet想象成一个巨大的资源库，则局域网中的客户端要访问Internet，则需要通过代理服务器来访问，这种代理服务就称为正向代理（也就是大家常说的，通过正向代理进行上网功能）

3、nginx正向代理的配置

现在的网站基本上都是https，要解决既能访问http80端口也能访问https443端口的网站，需要配置两个SERVER节点，一个处理HTTP转发，另一个处理HTTPS转发，而客户端都通过HTTP来访问代理，通过访问代理不同的端口，来区分HTTP和HTTPS请求。

[root@localhost ~]# vim /usr/local/nginx-1.12.1/conf/nginx.conf
server {
    resolver 114.114.114.114;       #指定DNS服务器IP地址 
    listen 80;
    location / {
        proxy_pass http://$host$request_uri;     #设定代理服务器的协议和地址 
                proxy_set_header HOST $host;
                proxy_buffers 256 4k;
                proxy_max_temp_file_size 0k;
                proxy_connect_timeout 30;
                proxy_send_timeout 60;
                proxy_read_timeout 60;
                proxy_next_upstream error timeout invalid_header http_502;
    }
}
server {
    resolver 114.114.114.114;       #指定DNS服务器IP地址 
    listen 443;
    location / {
       proxy_pass https://$host$request_uri;    #设定代理服务器的协议和地址 
             proxy_buffers 256 4k;
             proxy_max_temp_file_size 0k;
       proxy_connect_timeout 30;
       proxy_send_timeout 60;
       proxy_read_timeout 60;
       proxy_next_upstream error timeout invalid_header http_502;
    }
}
[root@localhost ~]# /usr/local/nginx-1.12.1/sbin/nginx -s reload

4、Linux客户端访问测试

http的访问测试

[root@localhost ~]# curl  -I --proxy 192.168.10.10:80 www.baidu.com
HTTP/1.1 200 OK
Server: nginx/1.12.1
Date: Mon, 11 Jun 2018 15:37:47 GMT
Content-Type: text/html
Content-Length: 612
Last-Modified: Thu, 31 May 2018 09:28:16 GMT
Connection: keep-alive
ETag: "5b0fc030-264"
Accept-Ranges: bytes
https的访问测试
[root@localhost ~]# curl  -I --proxy 192.168.10.10:443 www.baidu.com
HTTP/1.1 200 OK
Server: nginx/1.12.1
Date: Mon, 11 Jun 2018 15:38:07 GMT
Content-Type: text/html
Content-Length: 277
Connection: keep-alive
Accept-Ranges: bytes
Cache-Control: private, no-cache, no-store, proxy-revalidate, no-transform
Etag: "575e1f5c-115"
Last-Modified: Mon, 13 Jun 2016 02:50:04 GMT
Pragma: no-cache
5、设置Linux客户端全局代理
[root@localhost ~]# vim /etc/profile
export http_proxy='192.168.10.10:80'
export http_proxy='192.168.10.10:443'
export ftp_proxy='192.168.10.10:80'
[root@localhost ~]# source /etc/profile
[root@localhost ~]# curl -I www.baidu.com:80
HTTP/1.1 200 OK
Server: nginx/1.12.1
Date: Mon, 11 Jun 2018 16:10:18 GMT
Content-Type: text/html
Content-Length: 277
Connection: keep-alive
Accept-Ranges: bytes
Cache-Control: private, no-cache, no-store, proxy-revalidate, no-transform
Etag: "575e1f5c-115"
Last-Modified: Mon, 13 Jun 2016 02:50:04 GMT
Pragma: no-cache
[root@localhost ~]# curl -I www.baidu.com:443
HTTP/1.1 200 OK
Server: nginx/1.12.1
Date: Mon, 11 Jun 2018 16:10:27 GMT
Content-Type: text/html
Content-Length: 277
Connection: keep-alive
Accept-Ranges: bytes
Cache-Control: private, no-cache, no-store, proxy-revalidate, no-transform
Etag: "575e1f59-115"
Last-Modified: Mon, 13 Jun 2016 02:50:01 GMT
Pragma: no-cache

上面结果就说明我们的服务端nginx正向代理和客户端使用nginx做为全局代理设置成功。