最近我遇到了一个奇怪的问题，有时浏览器需要大约20秒来建立连接到IIS Web服务器
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，然后第一个请求在
之后得到如何调试？似乎这与网络，porxy，域有关，是否有一些工具可以帮助诊断这个问题，并且可以告诉我在建立连接的时间段内服务器正在做什么