最近我遇到一个奇怪的问题，有时浏览器需要大约 20 秒才能建立与 IIS Web 服务器的连接
1. this cannot be repro each time, when successful access the site, the following connecting will be very fast. After restart Application pool and Web Site, the first time connect will be slow.<br>
2. When success gernerate connection success, after minutes, the establsh connection will getting slow again.<br>
3. this is not relate to authentication, both Windows Authentication and Anonmymous will have the same problem.<br>
4. Installed HTTPWatch on my client machine, it shows that 20 seconds is connecting time before wating when this problem happen.<br>
5. localhost cannot repro, each time establish connection is fast
从 IIS 的日志中，得到第一个请求后
如何调试这个？似乎这与网络、端口、域有关，是否有一些工具可以帮助诊断这个问题，并且可以告诉我服务器在建立连接的时间段内在做什么