Can't Get Fiddler to Capture local traffic to IIS

Question

I have recently installed the latest Fiddler (Fiddler4) and absolutely nothing that I try is working to get it to capture local traffic. I have an MVC application that is conne

Answer 1

It turned out that I needed to set up Fiddler as a reverse proxy (http://fiddler2.com/documentation/Configure-Fiddler/Tasks/UseFiddlerAsReverseProxy). I don't really understand why before I upgraded from Fiddler2 to Fiddler4 I didn't have to do this. I used to be able to just use http://ipv4.localhost/app-name and all worked fine. In order to get it working with Fiddler4, though, I set-up the reverse proxy, and then changed all my requests from http://ipv4.localhost/app-name to http://machinename:8888/app-name. I can now listen in to inter-app communications. Any idea why I didn't have to do this with Fiddler2, but I now do after upgrading to Fiddler4?