这年头不能翻墙就等于被G*C*D给洗脑变成NC了。
前几天用squid 缓存代理服务器搭建了一个代理，访问百度OK，但访问google,www.slideshare.net就失败。
于是从服务器上看了下日志：
1371014207.652 1 222.129.32.31 TCP_MISS/000 0 GET http://www.slideshare.net/plamere/music-recommendation-and-discovery – DIRECT/www.slideshare.net -
状态码为： TCP_MISS/000 。
含义为：
1, The client aborted request before SQUID could return any data
2, The website might be unavailable, due to DNS issue, network issue or an abnormal running web server.
第二点我都没有显示设置过，因此应该是第一点，抓包验证了一下，果然是被GCD把连接给RST了：
GET http://www.slideshare.net/plamere/music-recommendation-and-discovery HTTP/1.1
Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, */*
Accept-Language: zh-cn
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 1.1.4322; .NET4.0C; .NET4.0E)
Accept-Encoding: gzip, deflate
Proxy-Connection: Keep-Alive
Host: www.slideshare.net
本地发送了GET请求，但被RST，因此squid 就记录错误码000了。
看来只能上SSH了
