解决方法
一些通用指针：
> http://blogs.iis.net/mailant/archive/2009/10/22/general-availability-of-windows-7-amp-windows-server-2008-r2-with-iis-7-5.aspx
> http://4sysops.com/archives/windows-server-2008-r2-new-features-the-complete-list-part-3-iis-75-and-performance/
> http://www.iis.net/ConfigReference/system.webServer/httpCompression>错误修复> FTP发布服务7.5> WebDAV 7.5>客户证书映射> IP安全>请求过滤> URL授权
