nginx 反向代理 iis 服务失败

连续两天了，这个问题一直困扰着我，目前没有找到问题所在。(原文链接 http://ddbiz.com/?p=190)

系统结构：

192.168.0.1—/
192.168.0.2---> 组成内部网；
192.168.0.3--/

其中 192.168.0.2 运行nginx + fastcgi, 执行 php web服务
192.168.0.3 运行 iis, .net 2.x
192.168.0.2 同时绑定了 公网ip,
nginx 配置如下：

#
# file: conf/nginx.conf
#

user  webuser webuser;
worker_processes  5;
pid        /usr/local/webserver/nginx.pid;
events {
    use epoll;
    worker_connections  1024;
}

http {
    include       mime.types;
    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" - "$http_cookie"';
    access_log  /usr/local/webserver/nginx/logs/access.log  main;
    error_log  /usr/local/webserver/nginx/logs/error.log  debug;

    sendfile        on;
    tcp_nopush     on;
    keepalive_timeout  65;
    gzip  on;
    #large_client_header_buffers 10 8k;
    include vhosts/*.conf;
    server {
        listen 80 default;
        server_name _;
        log_format defaultserver  '$remote_addr - [$time_local] "$http_HEADER" "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for"'
                      '$upstream_http_addr "$upstream_http_$request" $upstream_status ' ;
        access_log /usr/local/webserver/nginx/logs/access.log defaultserver;
        error_log  /usr/local/webserver/nginx/logs/error.log  debug;
        return 444;
    }
}

#
#file: conf/vhosts/site1...x.conf
#site1..x.conf 定义了n个运行在php+httpd的站点，使用 php-cgi ，运行正常；此配置文件略
#
...

#
#file: conf/vhosts/siteiis1.conf
#
    upstream devel
    {
       server 192.168.0.3:80;
    }

    proxy_cache_path /usr/local/webserver/cache/nginx/ levels=1:2 keys_zone=cache:10m inactive=10m max_size=1000M;

    server {
       listen 80;
       server_name developer.mysite.com;
       #index default.aspx;
       log_format askac  '$remote_addr - [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for"'
                      '$upstream_http_addr "$upstream_http_$request" $upstream_status ' ;
       access_log /usr/local/webserver/nginx/logs/dev.access.log askac;
       error_log  /usr/local/webserver/nginx/logs/dev.error.log  debug;

       location / {
         #proxy_redirect  off;
         ##proxy_cache cache;
         ##proxy_cache_valid 200 304 24h;
         ##proxy_cache_key $host$request_uri$args;
         proxy_set_header   Host $host;
         proxy_set_header   X-Real-IP $remote_addr;
         proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
         #client_max_body_size  1m;
         #client_body_buffer_size 128k;
         #proxy_connect_timeout   90;
         #proxy_send_timeout      90;
         #proxy_read_timeout      90;
         #proxy_buffer_size       8k;
         #proxy_buffers           4 32k;
         #proxy_busy_buffers_size 64k;
         #proxy_temp_file_write_size 64k;
         ##expires 2d;
         proxy_pass http://devel;
      }
}

此配置完成后，所有的站点访问都很正常，包括 iis, php，稳定运行半年，今日忽然发现 iis 的站点无法访问，所有对iis的访问都会发生 Timeout,

日志文件显示如下：

#
#access.log
#
xxx.xxx.xx.xx - [02/Feb/2010:10:00:09 +0800] "-" "-" 400 0 "-" "-" "-"- "--" -
...

#
#error.log
#
2010/02/02 10:01:42 [info] 1321#0: *85 recv() failed (104: Connection reset by peer) while reading client request line, client: xxx.xxx.xx.xx, server: _

从上月30号发现此问题，到现在为止，工作没有任何进展。 :-(

 

经过最近的测试，最有可能的原因是机房问题，机房的黑名单吧特定的域名给过滤了。

还是问问机房吧。(原文链接 http://ddbiz.com/?p=190)