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Fiddler web debugger stops website

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Gordon asked on 02 May 2020, 05:02 AM

Hi, Ive used Fiddler web debugger to extract information from a website. Ive done it multiple times with success.

(note the website is FLASH)

However today it (the website) just "stops".  Fiddler seems to be going, ive checked my firewall (zonealarm) and Fiddler has the green-light to proceed.


if i use the website WITHOUT Fiddler - it works OK, no problems..  But when i try turning fiddler ON, the website stops going. *NO* errors, or warnings or anything..  it just stops.. - it looks like a 'waiting' sign - waiting for the server to respond..   BUT - after 5, 10 minutes, its still waiting..  

If i stop fiddler & refresh the website - It loads up within 1-2 seconds... 


Progress Telerik Fiddler Web Debugger

v5.0.20202.18177 for .NET 4.6.1
Built: Tuesday, April 14, 2020

64-bit AMD64, VM: 117.0mb, WS: 161.0mb
.NET 4.8 WinNT 10.0.18362.0

You've run Progress Telerik Fiddler: 122 times.

Running on: new1ab:8888
Listening to: All Adapters
Gateway: No Gateway

Copyright ©2003-2020 Progress Software Corporation. All rights reserved.



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Eric R | Senior Technical Support Engineer
Telerik team
answered on 06 May 2020, 01:26 PM

Hi Gordon,

Thank you for providing the environment information. Although, I am not able to understand the whole scenario. Can you provide the following items?

1. A Session Archive Zip of the request(s).

2. The output of the Fiddler Log Tab.

3. Screenshots from the General, HTTPS, Connections and Gateway tabs in the Fiddler Options 

Once I have the above information, I will be able to provide more options for troubleshooting.

In the meantime, please let me know if you need any additional information. Thank you for using the Fiddler Forums.


Eric R | Senior Technical Support Engineer
Progress Telerik

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