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Error traffic

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rodrigo
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rodrigo asked on 25 Sep 2020, 10:36 PM

Hello, I am writing to you because I have a problem with fiddler, the problem is that it does not capture the traffic of the pages I have tried installing the new version and everything, but on my old pc if it captures the traffic of the pages, I would like to know how I could solve this problem, which only happens to me on this PC.

thanks for watching, and sorry for my bad english.

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Nick Iliev
Telerik team
answered on 29 Sep 2020, 08:49 AM

Hello Rodrigo,

 

Some of the most likely scenarios that prevent traffic from successfully capturing traffic are a flawed or incomplete configuration on the PC where Fiddler is installed. Can you please check and verify the following steps:

- Verify that you have installed the Fiddler trust certificate and let us know if you are able to capture both secure and non-secure traffic (HTTPS and HTTP).

- Verify that the OS proxy settings are successfully changed once the Fiddler's capturing mode is turned on.

- If you are using VPN software, try to disconnect both Fiddler and the VPN tool and then start Fiddler.

 

If you are still unable to solve your issue, then please provide as many details as possible, including:

- The used OS version

- The version of your Fiddler client

- Screenshots of your OS proxy settings before and after Fiddler capturing is enabled.

- A sample endpoint which you are using for testing the capturing

- The version of the used browser.

 

Regards,
Nick Iliev
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rodrigo
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answered on 29 Sep 2020, 07:48 PM
Thank you very much for your answer, I will be honest install and uninstall the fiddler about 10 times, both with your certificate.
I was going to send him everything he asked me to solve the problem, but something very curious happened to me, 2 days ago I installed a new browser this is "Opera GX", but why do I name it? Well, I reinstalled the fiddler again to be able to give you the information that you requested, and it happened that the fiddler captured the traffic in the Opera GX browser, but not that of my other browsers, I use maxthon, chrome, opera gx, and only in opera gx it captures only the traffic of Opera gx, what would be the problem here? Greetings and sorry for the inconvenience for my bad English
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Rosen Vladimirov
Telerik team
answered on 02 Oct 2020, 06:09 AM

Hi Rodrigo,

It seems the Opera GX browser is successfully using the proxy settings set by Fiddler Everywhere, while the other platforms disregard them. In order to determine what is causing the issue, please provide the following information:
- your operating system - name and version. Also, if it is Linux based, please provide information for your desktop environment - is it Gnome, KDE, etc.

- your proxy settings - check the OS's proxy settings after Fiddler Everywhere is started and ensure they are set

Basically it seems the proxy is set, but only Opera GX respects it.

Regards,
Rosen Vladimirov
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Virtual Classroom, the free self-paced technical training that gets you up to speed with Telerik and Kendo UI products quickly just got a fresh new look + new and improved content including a brand new Blazor course! Check it out at https://learn.telerik.com/.

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Nick Iliev
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rodrigo
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Rosen Vladimirov
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