I'm trying to capture the traffic happening when a domain-joined client uses Outlook Web App to log on to his Office 365 account. The whole setup is rather standard, with an on-premises Active Directory Federation Services instance that issues a security token to the user, which in turn hands this over to the Office 365 service. Without Fiddler everything runs smooth and the client logs on just fine. However if Fiddler is used, right when the 302 redirect happens from the O365 page towards the ADFS one on-premises, I'm prompted with a credential dialog, which just won't go away, regardless the values used are ok.

Could I have a pointer to what should I check in order to understand at least the cause of the credential prompt ?

Hi,

I am from Israel and I need to do my test in other countries (Such as US, UK ....) therefore I used Hola(Geo app).

But when I using it I can't see the requests in fiddler.

Please advice me what I can do.

Thanks,

Mali

If I press 

Options -> Connections -> Copy Browser Proxy Configuration URL

I get the following path in clipboard:

 file:///D:/Users/dims/%D0%9C%D0%BE%D0%B8%20%D1%84%D0%B0%D0%B9%D0%BB%D1%8B/Fiddler2/Scripts/BrowserPAC.js

i.e. it contains localized name of my folder in Windows.

Unfortunately, some programs do not understand localized names and do not work with this path (HtmlUnit library).

Is it possible to customize PAC file location in Fiddler?

It sounds so simple.  I want to capture all IIS traffic​--not just ASP.NET traffic​--including "static" file traffic (images, CSS, etc.) without shoving the static files through the ASP.NET pipeline.  I want to do this on the Web server, entirely​--no reverse proxy shoving the traffic across the network through a remote machine.

(I've asked the Internet, and tried too many things.  None of them work.  When people say IIS, they mean ASP.NET.  I mean IIS.  When people want to capture, they are fine with reverse-proxy to another machine.  I am not.)

I hope I'm missing something obvious.

Thanks in advance.

Hi There,

I have a question, perhaps someone can help me.

I got a software, that uses fiddler to capture network traffic and decrypt the HTTPS. The only 2 files are there: fiddlercore4.dll and fiddlercore4.xml.

The configuration has been made in such a way to use makecert.exe, however, the fiddler itself can use certenroll. what specifically should i change in the XML file to force it use certenroll instead of makecert? the windows 7 has issues with SHA256, and the generation of certificate fails all the time. However, if i use GUI version of fiddler, i could easily change between Makecert and Certenroll. Certenroll would work perfectly in such case.

Thank you.

The keys "I" and "O" can be used to indent the session. This is useful if you want to show parent/child requests.

I want to capture and inspect API traffic. I've already set up a Fiddler reverse proxy that decrypts HTTPS. What is the best way to deal with the many client side devices? I'll commonly generate traffic from Android, iOS and PC browsers but also dedicated devices such as Amazon Echo and IoT.

Here's my current thinking for a simple automated approach. I'll set up a network with two WiFi APs named "DIRECT" (normal) and "PROXY" (Fiddler reverse proxy). For Android and iOS devices, I can create "DIRECT" and "PROXY" settings. Done.

For PC browsers, how can I configure them so when I'm on "PROXY", I use proxy settings but when on any other AP, I DIRECT without tripping over any proxy existing settings? Should I use NetSetMan to change proxy settings based on network?

What about dedicated devices that may not have a proxy setting? Should I deal with them by creating some kind of "PROXY" router settings?

Is there some universal client side solution available such as described by Lawrence in http://www.telerik.com/forums/fiddlercore-as-transparent-proxy

Hi,

 I keep getting this error message when starting Fiddler on Windows 7.

Fiddler appears to be running on this user account. Maybe in a terminal services session.

If you run two copies of fiddler at the same time, your settings may be corrupted.

Start Fiddler anyway? ( Yes/No buttons)

I was using a previous version, sorry didnt record which one but I tend to keep it faily up to date. I started Fiddler2Script Editor ( by mistake as it happens ) and nothing started. I then attempted to run Fiddler and nothing started. I assumed my windows was in a mess and rebooted. However the problem persists and no happens on every attemt to start Fiddler. I upgraded to 2.5.1.2 and still the problem persists.

Can anyone point me at a solution, or tell me what you need to know to assist in finding a solution please.

Windows Event Viewer does not show any obvious issues.

In .Net web-service hosting the IIS and used for the desktop  application while login the app the person track and see all the input calls to service and response back into app.

Then analysis the issue and go through google and got solutions. to make HTTPS or ssl in webservice url.also encrypt and decrypt also doing both client and server side.

after that i check with fiddler they also tracking the web services call and responses .even they can able to break and run the app using this.

I was tired and make the protect the webservice calls. and unable to achive the what i need.

I also attached screenshot below for your reference.

Guys plz help me...if any otherway to protect the service calls in Fiddler. 

Hi

When i press f11 to stop at a process, how do i step then to go into each process after that, step by step?

Gary