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Questions tagged [fiddler]

Fiddler is a Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet.

http://www.fiddler2.com/fiddler/images/fiddlericon.gif

From Fiddler website (©2013 Telerik):

Fiddler is a Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet. Fiddler allows you to inspect traffic, set breakpoints, and "fiddle" with incoming or outgoing data. Fiddler includes a powerful event-based scripting subsystem, and can be extended using any .NET language.

Fiddler is freeware and can debug traffic from virtually any application that supports a proxy, including Internet Explorer, Google Chrome, Apple Safari, Mozilla Firefox, Opera, and thousands more. You can also debug traffic from popular devices like Windows Phone, iPod/iPad, and others.

76 questions
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What is the Linux equivalent of Fiddler?

On Windows I like using Fiddler to scan TCP streams and save them. Is there a similar tool to do this under Linux?
abc123
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Google Search hijacked only when not being observed. Attaching a debugger returns normal results

I cannot figure this one out. I noticed my search results were a little "different" as of late. I'm not signed in when I do a google search, but if I click "Images" or "Videos" I am shown as signed in. There's no wikipedia information in the…
Derek Ziemba
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Where can I find responses in fiddler?

I installed fiddler2 and trying to use it. Whenever I point on a line, I only see the contents of the request, but not the response (looking at the "raw" tab). Where can I find the responses?
shealtiel
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Using Chrome and Fiddler showed strange requests - what is it?

For one of my projects I am using Fiddler ( http://www.fiddler2.com/fiddler2/ ) to trace my http request. I have noticed some strange calls (screenshot) to some weird URLs whenever I start Chrome (Version 23.0.1271.1 dev-m) . I have disabled all…
Horst Walter
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Capture virtual machine traffic in Fiddler

I'm running Ubuntu in a virtual machine (host machine is Windows 7). Is it possible to use Fiddler in the host machine to capture the traffic from the virtual machine? Seeing as the virtual machine's network must be passing through the host…
HtS
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how to ignore HSTS on Chrome?

am running Chrome 103.0.5060.66 and intentionally MITM'ing myself with Fiddler Proxy, and it works on websites not using HSTS, but breaks on HSTS sites. How can i tell Chrome to ignore HSTS? example of a website using HSTS: https://www.century21.pt/…
hanshenrik
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Capturing Internet Connection Sharing (ICS) traffic using Fiddler

How can we capture HTTP traffic that goes through an ICS connection? Full details: I have a PC connected to internet via Ethernet. PC has set up a Wifi Hotspot using Internet Connection Sharing (ICS) to share out internet to mobile devices. I have…
FrankieA
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Connection speed fast once I start Fiddler

I have two laptops, one of them has no problems whatsoever when it comes to browsing the internet, everything is speedy and pages load as expected. The other one however, is a nightmare. Pages load slow, and it looks like the browser just sits there…
thomasvm
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How do I re-attach the details window in Fiddler after using Tearoff

I clicked the "Tearoff" tab in Fiddler2, which made the details view a separate window. How to I put the details back into the primary window?
Feckmore
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Fiddler not showing captured traffic on windows 7

I have fiddler installed on a Windows 7 32 bit machine. When I start fiddler it correctly sets the proxy settings of IE9 browser (Firefox and chrome browsers too). However the captured traffic is not showing in the web sessions window. I know it is…
wardk
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Set proxy authentication information in Fiddler

I wish to use Fiddler to debug the submitted request/responses from my SOAP client. I am inside a network that needs proxy authentication to talk to the server outside the network. Fiddler2 provides option to set the upstream proxy, but without the…
Kangkan
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How can I get Fiddler to watch traffic through CNTLM

EDIT: I don't know what I did before but it seems to work ok now. I'm not seeng traffic form TortoiseHg but that's no major loss. Traffic from the browser is fine. I've voted to close this question. I'm behind an ISA server so I'm using CNTLM to…
CAD bloke
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Chrome sending of packets to random destinations upon reconnect/disconnect

Noticed an interesting thing whilst debugging one of my websocket applications that Google Chrome will push out 3 http requests upon a network connection status changing; Quite disconcerting and looks almost as if some malware is checking out to a…
cillierscharl
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Fiddler makes my chrome have no internet connection

hello every one i have installed Fiddler on my win 10 1809 PC .. although i have installed the https certificate it still doesn't work !! at the first pic the error is shown and at the second one when i tried to fix it
mina nageh
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Fiddler not working in Windows 7 - LAN Settings locked?

I've been using Fiddler for years, but now, on Windows 7 (64 bit) I cannot get it to monitor traffic from IE 8. With the Firefox add-on, it is able to monitor Firefox traffic with no problem. This is not related to monitoring HTTPS traffic, or…
Glen Little
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