IIS reports Error 404. My Solution

Environment: Windows 2008 R2; iis7.5

Recently, I used the signalr framework to develop the online chat function. When I deployed it to IIS, I found that the Error 404 was always reported. I found a lot of methods on the Internet that could not be solved, which is really a crash. Then I went to the Internet to read the signalr tutorial. I have a faqArticle, See the solution of 404. If you are interested, visit https://github.com/signalr/signalr/wiki/faq.

Follow.

<Configuration> <system. webserver> <modules runallmanagedmodulesforallrequests = "true"> </modules> </system. webserver> </configuration>

I am only confused that it is normal to run the test on another machine (the environment is the same as the configuration) without adding the node above, and no Error 404 is reported.