No traffic is logged when using Fiddler on localhost


Fiddler is a great tool for logging HTTP/HTTPS traffic in the client side. However, you may see that no traffic is logged if you would like to debug your web site by browsing http://localhost or http://127.0.0.1. If this is your case then you can try to browse the web site with http://ipv4.fiddler or http://ipv6.fiddler URLs. These URLs would be mapped to 127.0.0.1 or ::1 and you will have the HTTP packet details in Fiddler.

Reference:

Why don't I see traffic sent to http://localhost or http://127.0.0.1?
http://www.fiddler2.com/Fiddler/help/hookup.asp#Q-LocalTraffic

PS: Latest version of the Fiddler will log the traffic for http://localhost or http://127.0.0.1 if you use Internet Explorer 9.0 or later.

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AMB

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