proxy.conf

proxy_redirect     off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header REMOTE-HOST $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
client_max_body_size    10m;
client_body_buffer_size    128k;
# client_body_temp_path   /var/nginx/client_body_temp;
proxy_connect_timeout   90;
proxy_send_timeout      90;
proxy_read_timeout      90;
#proxy_send_lowat           12000;
proxy_buffer_size         32k;
proxy_buffers             4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
# proxy_temp_path            /var/nginx/proxy_temp;
proxy_ignore_client_abort on;
proxy_next_upstream error timeout invalid_header http_500 http_503 http_404;
proxy_max_temp_file_size 128m;

nginx.conf

#user  nobody;
worker_processes  1;
#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;
#pid        logs/nginx.pid;
events {
    worker_connections  1024;
}
http {
    include       mime.types;
    include       proxy.conf;
    default_type  application/octet-stream;
    #log_format  main  ’$remote_addr – $remote_user [$time_local] “$request” ‘
    #                  ’$status $body_bytes_sent “$http_referer” ‘
    #                  ’”$http_user_agent” “$http_x_forwarded_for”‘;
    #access_log  logs/access.log  main;
    sendfile        on;
    #tcp_nopush     on;
    #keepalive_timeout  0;
    keepalive_timeout  65;
    #gzip  on;
    server {
        listen       80;
        server_name  localhost;
        #charset koi8-r;
        #access_log  logs/host.access.log  main;
        location / {
            root   html;
            index  index.html index.htm;
        }
        #error_page  404              /404.html;
        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}
        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}
        # deny access to .htaccess files, if Apache’s document root
        # concurs with nginx’s one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }
    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;
    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}
    # HTTPS server
    #
    #server {
    #    listen       443;
    #    server_name  localhost;
    #    ssl                  on;
    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;
    #    ssl_session_timeout  5m;
    #    ssl_protocols  SSLv2 SSLv3 TLSv1;
    #    ssl_ciphers  ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
    #    ssl_prefer_server_ciphers   on;
    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}
    #其他的都不用管,只要放对地方就可以,最主要是下面这一行,照着填就可以了!一行一个站,一个站对一个端口,端口不要重复，否则你的ＩＩＳ内的站启动不了！
    server { listen 80; server_name  sun87.cn; location / { proxy_pass http://192.168.0.11:81; }}
    server { listen 80; server_name  www.sun87.cn; location / { proxy_pass http://192.168.0.11:82; }}
}

ＰＳ：这是代理服务器上的配置，就是找个没封８０的ＩＰ或租个国外的ＶＰＳ都可以，否则会和你本机已经开放的80冲突，然后通过这个代理服务器跳转到你封80的机器上，封80的机器的站点上添加个空主机头端口是81即可，这里的81是随便填的，计算机内有655535个端口你可以随便设置，这样封80就在也没什么用了！

哥再写个具体傻瓜式操作步骤：

１、上面的软件下载解压到你的80没封的服务器配置好，这上面最好不要有网站，否则会和你原来的网站用的80冲突；

２、把你的域名解析到上面没封80的ＩＰ上，然后去你封80的机器上把原来的站点上添加个空主机头端口是81，如http://192.168.0.11:81可以访问到你的网站上就可以了；

３、Nginx.exe每改一次配置文件需要在任务管理器内结束任务后再启动一次才会生效，是实时生效的！记住两个Nginx.exe的进程都要结束掉，否则没用；

４、1.atimg.com这里是换成你的域名的，多个域名用空格分开，没有限制，一个站一行，不要多个站放在一行；

５、启Nginx.exe直接双击即可，会一闪而过，只要任务管理器的进程里出现两个Nginx.exe就是正常运行了，否则就是配置文件错误没有启动；

６、出现504 Gateway Time-out这个错误是你的代理服务器无法访问http://192.168.0.11:81这个地址，你可以试下，如果你可以服务器不可以可能和你的防火墙或策略有关；