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Localhost support in fiddler every where

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Somnath
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Somnath asked on 11 Jul 2020, 04:35 AM
I am not able to capture the localhost request in fiddler everywhere v0.11

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Nick Iliev
Telerik team
answered on 14 Jul 2020, 06:32 AM

Hello Somnath Shukla,

 

Thank you for your interest in Fiddler Everywhere and for your feedback!

Just like the classic Fiddler (and many other applications), the Fiddler Everywhere is hardcoded to bypass proxies for requests targeted to localhost. The only way to circumvent this behavior is to “trick” the applications that they are targeting a remote host. The only way to do this is to use a domain name that differs from the localhost and recognize this domain name in Fiddler to handle the request accordingly. Hence, the various workarounds available: https://docs.telerik.com/fiddler/Configure-Fiddler/Tasks/MonitorLocalTraffic

the above said,  instead of typing

http://localhost/some-page

Use the following:

http://ipv4.fiddler/some-page

If your localhost is using a specific port, then pass the port to the Fiddler Everywhere address as well (for example,localhost:4000 becomes ipv4.fiddler:4000).

 

Regards,
Nick Iliev
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Somnath
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answered on 18 Jul 2020, 12:10 PM

can u tell me why i have never faced any issue with classic fiddler.

this is the reason i am back to old fiddler.

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Nick Iliev
Telerik team
answered on 20 Jul 2020, 06:06 AM

Hi Somnath,

 

The alias IPs (like ipv4.fiddler) were introduced in FiddlerCore which is part of both the classic Fiddler and Fiddler Everywhere so it is strange that you are accessing the localhost on the classic Fiddler.

Still, the team acknowledged that this functionality can be improved and is currently looking for a way to provide more seamless usage of localhost. We will post once the full localhost support is introduced in Fiddler Everywhere.

 

Regards,
Nick Iliev
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