因需要，用一台服务器做代理给其它服务器 上网。http 用的是7层代理，https用的是4层代理

 1 user  root;
 2 worker_rlimit_nofile 1000000;
 3 worker_processes  auto;
 4 
 5 pid   logs/nginx.pid;
 6 
 7 events {
 8     use epoll;
 9     worker_connections  16384;
10 }
11 http {
12     include       mime.types;
13     default_type  application/octet-stream;
14     
15     log_format commlog '$remote_addr - $remote_user [$time_local] "$request" - "$request_body"';
16 
17     sendfile        on;
18 
19     keepalive_timeout  65;
20 
21     server {
22         resolver 114.114.114.114;       #指定DNS服务器IP地址  
23         listen 80;  
24         location / {  
25            proxy_pass http://$host$request_uri;    #设定代理服务器的协议和地址  
26            proxy_buffers 256 4k;
27            proxy_max_temp_file_size 0k; 
28            proxy_connect_timeout 30;
29            proxy_send_timeout 60;
30            proxy_read_timeout 60;
31            proxy_next_upstream error timeout invalid_header http_502;
32         } 
33      }    
34 }
35 
36 stream {                                           #stram模块 和http模块是一同等级；做四层代理时需要添加上这个模块；
37     log_format proxy '$proxy_protocol_addr $remote_addr [$time_local]'
38                 '$protocol "$status" $bytes_sent $bytes_received'
39                 ' "$upstream_addr" "$session_time" "$upstream_connect_time" "$ssl_preread_server_name" "$server_addr"';
40     access_log  logs/aaa.log  proxy;
41     open_log_file_cache off;
42 
43     resolver 223.5.5.5 119.29.29.29 valid=3m;
44 
45     server {
46         listen 80;                          #8811端口将以4层TCP协议方式转发至后端nginx_sever;
47         proxy_pass $server_addr:$server_port;
48         proxy_connect_timeout 15s;
49         proxy_timeout 15s;
50         proxy_next_upstream_timeout 15s;
51      }
52     server {
53         listen 443;                          #8811端口将以4层TCP协议方式转发至后端nginx_sever;
54         ssl_preread on;
55         proxy_pass $ssl_preread_server_name:$server_port;
56         proxy_connect_timeout 15s;
57         proxy_timeout 15s;
58         proxy_next_upstream_timeout 15s;
59     }
60 
61 }