STarting fiddler help me regain my internet connection, but how to know the actual cause

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Fiddler Classic Windows
Mohd Hafizzul Bin
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Mohd Hafizzul Bin asked on 11 Oct 2021, 11:42 PM

Hi,

I've been unable to connect to any website from my browsers suddenly few days ago. But other connection okay (ping/email/ftp/etc). At that point of time, I still do not install Fiddler

So I downloaded, install and start Fiddler to check what happen to the packet when I'm browsing.

To my surprise, when I start Fiddler, I am able to browse again. So, I suspect, my OS is blocking my connection. So, when I start FIddler, the packet is being routed by Fiddler to its tunnel and I can connect to website again

So, basically I have no problem with Fiddler, in fact Fiddler help me conclude that my own laptop block my connection to website.

However, I just need your help to teach me, how to know, at which configuration in Windows, that it block my connection. Can you give me any guideline or hint. (When I refer to WIndows Firewall rule, I am unable to eyeball any obvious rule that block connection to website)

Great thanks in advance for your help!!

Nick Iliev
Telerik team
commented on 13 Oct 2021, 06:23 AM

You could check the following threads for some of the possible reasons why your requests might be working with Fiddler (but not working with Fiddler off)

https://stackoverflow.com/questions/1030218/httpwebreqest-works-with-fiddler-on-otherwise-timeout

https://www.telerik.com/blogs/help!-running-fiddler-fixes-my-app-

Mohd Hafizzul Bin
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commented on 22 Oct 2021, 12:08 PM

THanks a lot for the links!

No answers yet. Maybe you can help?

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