Debugging localhost traffic in Fiddler

Fiddler is  a great tool to web-debug your HTTP traffic. It acts as proxy between your computer and the Internet. However, by default it does not capture any localhost to localhost HTTP traffic.

I searched on the net regarding this and most of the articles and blogs that I found recommended using a dot “.” (period) after the localhost in your URLs for e.g. use http://localhost.:5282 instead of http://localhost:5282

I tried it but it did not work. The Fiddler’s proxy gave an error for being unable to process this URL. After a couple of more searching I found out that I am supposed to use this URL: http://ipv4.fiddler:5282/ and it worked just fine. J

Happy fiddling.