Nginx 反向代理，流量转发到固定内网 IP 方法

主配置文件：

 1 user  nginx;
 2 worker_processes  1;
 3 
 4 error_log  /var/log/nginx/error.log warn;
 5 pid        /var/run/nginx.pid;
 6 
 7 events {
 8     worker_connections  1024;
 9 }
10 
11 http {
12     include       /etc/nginx/mime.types;
13     default_type  application/octet-stream;
14 
15     log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
16                       '$status $body_bytes_sent "$http_referer" '
17                       '"$http_user_agent" "$http_x_forwarded_for"';
18 
19     access_log  /var/log/nginx/access.log  main;
20 
21     sendfile        on;
22     #tcp_nopush     on;
23 
24     keepalive_timeout  65;
25 
26     gzip  on;
27 
28 #################
29 
30  proxy_connect_timeout 300;
31     proxy_send_timeout 300;
32     proxy_read_timeout 300;
33     proxy_buffer_size 16k;
34     proxy_buffers 4 32k;
35  
36     proxy_set_header Host $host;
37     proxy_set_header X-Real-IP $remote_addr;
38     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
39 
40     #proxy_set_header X-Forwarded-For $remote_addr;
41     proxy_set_header Connection Close;
42 
43     server_names_hash_max_size 1024;
44     server_names_hash_bucket_size 1024;
45 
46     # Default cache parameters for use by virtual hosts 
47 
48     # Set the cache path to tmpfs mounted disk, and the zone name 
49 
50     # Set the maximum size of the on disk cache to less than the tmpfs file system size 
51 
52     proxy_cache_path  ./cache  levels=1:2  keys_zone=pscms:100m max_size=800m; 
53 
54     proxy_temp_path   ./proxy; 
55 
56 #############
57 
58     include /etc/nginx/conf.d/*.conf;
59 }

网站配置文件：

 1 upstream web_server {
 2         #sticky;
 3         server 192.168.203.23;
 4         server 192.168.203.24;
 5         server 192.168.203.25;
 6      #  ip_hash;
 7     }
 8 
 9 server {
10     listen       80;
11     server_name  localhost;
12     charset utf-8;
13     access_log  /var/log/nginx/21.log  main;
14 
15 location / {
16 if ( $remote_addr ~* ^(.*)\.(.*)\.(.*)\.193$){
17                 proxy_pass http://192.168.203.22;
18                 break;
19         }
20 
21             proxy_set_header Host $http_host;
22             proxy_redirect     off;
23             proxy_pass         http://web_server;
24             proxy_set_header   Host             $host;
25             proxy_set_header   X-Real-IP        $remote_addr;
26             proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
27         }
28 }