Nginx正向代理配置

Nginx配置正向代理支持HTTP和HTTPS转发
Nginx本身不支持HTTPS正向代理，需要安装ngx_http_proxy_connect_module模块后才可以支持HTTPS正向代理，否则会遇到HTTP 400错误。

参考文档：
https://github.com/chobits/ngx_http_proxy_connect_module

安装Nginx和ngx_http_proxy_connect_module模块

mkdir -p /downloads
cd /downloads
git clone https://github.com/chobits/ngx_http_proxy_connect_module.git
wget http://nginx.org/download/nginx-1.15.12.tar.gz
tar -xzvf nginx-1.15.12.tar.gz
cd nginx-1.15.12/
patch -p1 < /downloads/ngx_http_proxy_connect_module/patch/proxy_connect_rewrite_101504.patch
./configure --add-module=/downloads/ngx_http_proxy_connect_module
make && make install

修改Nginx配置文件
Nginx目录：/usr/local/nginx
修改Nginx目录下conf/nginx.conf配置文件，在http中添加以下内容：

server {  
    resolver 114.114.114.114; 
    listen 8080;  
    location / {  
        proxy_pass http://$http_host$request_uri;
        proxy_set_header HOST $http_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 {
     listen                         8443;

     # dns resolver used by forward proxying
     resolver                       114.114.114.114;

     # forward proxy for CONNECT request
     proxy_connect;
     proxy_connect_allow            443 563;
     proxy_connect_connect_timeout  10s;
     proxy_connect_read_timeout     10s;
     proxy_connect_send_timeout     10s;

     # forward proxy for non-CONNECT request
     location / {
         proxy_pass http://$host;
         proxy_set_header Host $host;
     }
 }

启动Nginx
运行./sbin/nginx启动Nginx。

Nginx命令参考：

# Start Nginx
./sbin/nginx

# Reload Nginx configuration
./sbin/nginx -s reload

# Stop Nginx
./sbin/nginx -s stop

查看端口

netstat -tnlp | grep 8080
netstat -tnlp | grep 8443

打开防火墙

firewall-cmd --zone=public --add-port=8080/tcp
firewall-cmd --zone=public --add-port=8080/tcp --permanent
firewall-cmd --zone=public --add-port=8443/tcp
firewall-cmd --zone=public --add-port=8443/tcp --permanent
firewall-cmd --reload

验证端口：

# ss -anput | grep ":8080" #检查端口

测试代理

# Test HTTP proxy
curl --proxy 192.168.87.123:8080 http://www.baidu.com
# Test HTTPS proxy
curl --proxy 192.168.87.123:8443 https://www.baidu.com