I followed setup instructions, but am getting the following exception 

[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: An exception was thrown by the type initializer for System.Windows.Forms.WindowsFormsSynchronizationContext ---> System.TypeInitializationException: An exception was thrown by the type initializer for System.Windows.Forms.ThemeEngine ---> System.TypeInitializationException: An exception was thrown by the type initializer for System.Windows.Forms.ThemeWin32Classic ---> System.TypeInitializationException: An exception was thrown by the type initializer for System.Drawing.KnownColors ---> System.TypeInitializationException: An exception was thrown by the type initializer for System.Drawing.GDIPlus ---> System.DllNotFoundException: libgdiplus.dylib
  at (wrapper managed-to-native) System.Drawing.GDIPlus:GdiplusStartup (ulong&,System.Drawing.GdiplusStartupInput&,System.Drawing.GdiplusStartupOutput&)
  at System.Drawing.GDIPlus..cctor () [0x00000] in <filename unknown>:0 
  --- End of inner exception stack trace ---
  at System.Drawing.KnownColors..cctor () [0x00000] in <filename unknown>:0 
  --- End of inner exception stack trace ---
  at System.Drawing.Color.get_AliceBlue () [0x00000] in <filename unknown>:0 
  at Fiddler.CONFIG..cctor () [0x00000] in <filename unknown>:0 
  --- End of inner exception stack trace ---
  at System.Windows.Forms.ThemeVisualStyles..ctor () [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.ThemeEngine..cctor () [0x00000] in <filename unknown>:0 
  --- End of inner exception stack trace ---
  at System.Windows.Forms.SystemInformation.get_MenuAccessKeysUnderlined () [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Control..ctor () [0x00000] in <filename unknown>:0 
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control:.ctor ()
  at System.Windows.Forms.WindowsFormsSynchronizationContext..cctor () [0x00000] in <filename unknown>:0 
  --- End of inner exception stack trace ---
  at System.Windows.Forms.Control..ctor () [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.ScrollableControl..ctor () [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.ContainerControl..ctor () [0x00000] in <filename unknown>:0 
  at System.Windows.Forms.Form..ctor () [0x00000] in <filename unknown>:0 
  at ...ctor () [0x00000] in <filename unknown>:0 
  at (wrapper remoting-invoke-with-check) .:.ctor ()
  at Fiddler.frmViewer.‹• (System.String[] ˆ•) [0x00000] in <filename unknown>:0 
  at Fiddler.frmViewer.‡• (System.String[] ˆ•) [0x00000] in <filename unknown>:0 
exception inside UnhandledException handler: An exception was thrown by the type initializer for Fiddler.CONFIG

I get an error while loading fiddler (attached screenshot).

Could not find file "<install directory>/active.txt"

 

After I updated the latest Fiddler(Telerik Fiddler Web Debugger (v4.6.2.32002)) recently, thers is often a yellow bar with "The system proxy was changed..." shows on the top of the window, and stop capturing.

This happens really often, about per 15 seconds.

I used Process Monitor to find out which application has changed my system proxy, and find out the system proxy was disabled by Fiddler itself, as the picture attached.

Have anyone know the reason, and how can I fix it.

Thanks,

Donald

Hello!

I'm using Fiddler to validate the Google Analytics tag on my client's apps. Among other things, I need to validate the Screen Name of each screen in the app, but I can't find this information. Does anyone know how to find this information and would be willing to help me?

Thanks! :)

 

Where I work I need to test payment processes (Elavon, SagePay etc)

I need to open a port on my router and forward it to my machine so that the redirect URL for the payment will work correctly.

The port on the router is only open and forwarding when I need to test payment stuff.

 

When I have the port open and am using Fiddler to test I notice that I get inbound requests showing from google.pl and a few others which seem to use my computer to perform searches etc.

 

How can I get Fiddler to stop allowing these requests? As I'm currently having to constantly open and close Fiddler so that only running when absolutely needed.

Hello,

 

I keep receiving the following error each time I open Fiddler:

---------------------------
Folder Creation Failed
---------------------------
Fiddler has encountered an unexpected problem. If you believe this is a bug in Fiddler, please copy this message by hitting CTRL+C, and submit a bug report at http://www.telerik.com/forums/fiddler.

Access to the path 'C:\Users\Rich\Documents\Fiddler2\Captures' is denied.

Type: System.UnauthorizedAccessException
Source: mscorlib
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)

   at System.IO.Directory.InternalCreateDirectory(String fullPath, String path, Object dirSecurityObj, Boolean checkHost)

   at System.IO.Directory.InternalCreateDirectoryHelper(String path, Boolean checkHost)

   at Fiddler.CONFIG.() in c:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Application\Config.cs:line 1644


Fiddler v4.6.2.32002 (x64 AMD64) [.NET 4.0.30319.42000 on Microsoft Windows NT 10.0.14393.0] 
---------------------------
OK   
---------------------------

I am sure you guys are busy testing the beta version of Fiddler for the Mac.  I am super excited to see this work moving forward.  Unfortunately the number one feature I use these days does not work on the beta version for the Mac, which is Remote connections.  Each time I try to select to Allow remote connections it crashes. :-(

Is this a known issue?  If so I hope it can be addressed soon as without this the usage of Fiddler on the Mac is dead on arrival for me.

 

So I looked up a video on bypassing HWID authentication and it looks like something like this. Take a look at the screenshot below:

https://i.imgur.com/U5axh27.png?1

This is what I'm supposed to get when someone uses Fiddler to receive the authenticating packets(?) but all I get is this when I'm using Fiddler I don't get anything:

http://i.imgur.com/deCF1iX.png

Do you guys have any clue as to how to solve this problem? Was this an impossible task from the beginning because I would first have to infiltrate their servers first? A in this case, a .lua script is injected into league of legends.exe and that .lua is asking for an HWID authentication from their server at access.sx-auth.me... Someone please help me! I've been trying to solve this for the past four days and I just can't seem to do it. At least tell me it's impossible so I can stop hurting myself lmao. Thanks.

HI, I came across the blog article below and I'm curious if there are any examples on how to use an existing cert vs the default "fiddler DO NOT TRUST".

http://blogs.telerik.com/fiddler/posts/13-08-19/faq---certificates-in-fiddler

Hello Eric,

I have a quick question.
I have made a c# program that downloads files from any site and saves them (if, and only if the content type of the file contains the word "torrent").

One site in particular allows me to do this. However after I have downloaded "X" number of files, my ip is prevented from downloading any more for a 24 hour period.

The temporary (or manual) solution to this is to disconnect and reconnect my internet (therefore getting a new ip address).

However this is not feasible, as I need this functionality inside a C# winforms app.

Can FiddlerCore change my actual internet ip address (without me disconnecting and reconnecting) just before sending an HttpWebRequest to a new download link (ie generate a new one) ?
(or even better) Can it spoof my ip address ? And if so,would it require FiddlerCore to setup as a proxy ?

Thanks

Hendrik