We have a web based application that renders inside an iFrame. When using Fiddler and decrypting HTTPS, there is one iFrame that generates the message "The security certificate presented by this website was not issued by a trusted certificate authority". If we uncheck the decrypt option or use the application without Fiddler running we have no errors. Looking at the URL it is trying to browse to a website that has a Fiddler DO_NOT_TRUST certificate in the user personal certificate repository. I have clicked on the Actions button on the HTTPS tab and chosen the "Trust Root Certificate" option but that made no difference.  Any ideas why this one site would reject the Fiddler certificate?

Thanks in advance

Hi,
I have problem download the certificate on any mobile (iOS and android)  at work.
I made the configurations on my phone but I still can't download the certificate on this address:
http://ipv4.fiddler:8888/ (Device : Samsung S8, S7, Iphone X, iphone 6)
the Fiddler Echo Service dos not load
the "Decrypt HTTPS" option in Tools -> Options -> HTTPS is checked.
NB (At home it works without problems with the wifi)

Has this to do with the corpatret wifi that does not allow this?

 

Thanks

Hi Friends,

I am using a Chrome browser and when I turn Capturing On I notice that I am unable to see the http request data from my Restful API and my page also does not return any data. I notice that when i open another Chrome Browser the URL says Not Secure and their is a message in the body of the page that reads... Your connection is not private. I dont have a clue as to what is going on so I just titled my question as this being an issue with the proxy. Thanks for any help !

I'm inspecting a request that sends gzip data via an https post. Is there a way to decompress the body?

I have to trace incoming https requests using fiddler. As per docs, we have to use fiddler as reverse proxy for which we need to make a change in registry. 

In organization, touching registry manually is not allowed. Is there anyother way to enable the reverse proxy feature. Is there any button available in fiddler through which changes can be done automatically. 

Please suggest. I need this on urgent basis. 

Hi guys,

I'm getting the following error:

 

I have trusted the fiddler root certificate, imported it via mmc. Further more I have set fiddler to ignore certificate errors, and enabled the following protocols:

<client>;ssl2;ssl3;tls1.0;tls1.1;tls1.2

I'm using fiddler 4.5, but have also tried with version 2.

I also tried searching for this issue, but no solution seemed to present itself. Usually adding tls1.2 worked for people, but not in my case :(

Hello,

 I am getting the following error in fiddler and without Capture HTTPS CONNECTs it works, also in the Protocols I have enabled: <client>;ssl2;ssl3;tls1.0;tls1.1;tls1.2

fiddler.network.https> HTTPS handshake to <domain> (for #6) failed. System.Security.Authentication.AuthenticationException A call to SSPI failed, see inner exception. < The message received was unexpected or badly formatted

Win32 (SChannel) Native Error Code: 0x80090326

 

I have a fiddler capture and a netMon capture but don't wish to post that here.

 

Thank you,

Ahsen Baig

Hi, I'm running fiddler v5.0.20182.28034 for .NET 4.6.1 on Windows 10. When I start a capture or open an archive, after a couple minutes the session window automatically clears. I then have to either recapture my sessions or re-open the archive. 

Is there a setting that is performing the automatic clearing? Seems to happen every couple minutes. 

also note I don't see this behavior on Windows Server with the same version of fiddler. 

 

thanks!

 

I knoiw a chrome plugin uses proxy for its communication

Can fiddler intercept that?

Hello, I followed the instructions, but got the below exception - 

$ mono fiddler.exe
WARNING: The Carbon driver has not been ported to 64bits, and very few parts of Windows.Forms will work properly, or at all
Stacktrace:
  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) System.Windows.Forms.XplatUICarbon.CGDisplayBounds (intptr) [0x00002] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at System.Windows.Forms.XplatUICarbon.get_WorkingArea () [0x00005] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at System.Windows.Forms.XplatUICarbon.get_VirtualScreen () [0x00000] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at System.Windows.Forms.XplatUI.get_VirtualScreen () [0x00000] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at System.Windows.Forms.Screen..cctor () [0x00034] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at (wrapper runtime-invoke) object.runtime_invoke_void (object,intptr,intptr,intptr) [0x0001e] in <98fac219bd4e453693d76fda7bd96ab0>:0
  at <unknown> <0xffffffff>
  at System.Windows.Forms.Form.get_CreateParams () [0x00157] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at System.Windows.Forms.Control.CreateHandle () [0x0002a] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at System.Windows.Forms.Form.CreateHandle () [0x00000] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at System.Windows.Forms.Control.CreateControl () [0x00039] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at System.Windows.Forms.Control.SetVisibleCore (bool) [0x00057] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at System.Windows.Forms.Form.SetVisibleCore (bool) [0x00065] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at System.Windows.Forms.Control.set_Visible (bool) [0x00009] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at System.Windows.Forms.Control.Show () [0x00000] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control.Show () [0x00031] in <556a6ba2c0a546f1ad2318c309ce0945>:0
  at Fiddler.frmViewer.‹• (string[]) [0x00081] in <09623c708fdb40a483cea147bbea7a7f>:0
  at Fiddler.frmViewer.‡• (string[]) [0x00016] in <09623c708fdb40a483cea147bbea7a7f>:0
  at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) [0x0004e] in <09623c708fdb40a483cea147bbea7a7f>:0
exception inside UnhandledException handler: The type initializer for 'System.Windows.Forms.Screen' threw an exception.


[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: The type initializer for 'System.Windows.Forms.Screen' threw an exception. ---> System.NullReferenceException: Object reference not set to an instance of an object
  at (wrapper managed-to-native) System.Windows.Forms.XplatUICarbon.CGDisplayBounds(intptr)
  at System.Windows.Forms.XplatUICarbon.get_WorkingArea () [0x00005] in <556a6ba2c0a546f1ad2318c309ce0945>:0 
  at System.Windows.Forms.XplatUICarbon.get_VirtualScreen () [0x00000] in <556a6ba2c0a546f1ad2318c309ce0945>:0 
  at System.Windows.Forms.XplatUI.get_VirtualScreen () [0x00000] in <556a6ba2c0a546f1ad2318c309ce0945>:0 
  at System.Windows.Forms.Screen..cctor () [0x00034] in <556a6ba2c0a546f1ad2318c309ce0945>:0 
   --- End of inner exception stack trace ---
  at System.Windows.Forms.MessageBox+MessageBoxForm.InitFormsSize () [0x00002] in <556a6ba2c0a546f1ad2318c309ce0945>:0 
  at System.Windows.Forms.MessageBox+MessageBoxForm.RunDialog () [0x0000f] in <556a6ba2c0a546f1ad2318c309ce0945>:0 
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.MessageBox+MessageBoxForm.RunDialog()
  at System.Windows.Forms.MessageBox.Show (System.Windows.Forms.IWin32Window owner, System.String text, System.String caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon) [0x0000b] in <556a6ba2c0a546f1ad2318c309ce0945>:0 
  at Fiddler.FiddlerApplication.DoNotifyUser (System.Windows.Forms.IWin32Window ownerWnd, System.String sMessage, System.String sTitle, System.Windows.Forms.MessageBoxIcon oIcon) [0x0002c] in <09623c708fdb40a483cea147bbea7a7f>:0 
  at Fiddler.FiddlerApplication.DoNotifyUser (System.String sMessage, System.String sTitle, System.Windows.Forms.MessageBoxIcon oIcon) [0x00000] in <09623c708fdb40a483cea147bbea7a7f>:0 
  at Fiddler.FiddlerApplication.ReportException (System.Exception eX, System.String sTitle, System.String sCallerMessage) [0x001a4] in <09623c708fdb40a483cea147bbea7a7f>:0 
  at Fiddler.FiddlerApplication.ReportException (System.Exception ‚) [0x00006] in <09623c708fdb40a483cea147bbea7a7f>:0 
  at Fiddler.frmViewer.• (System.Object, System.UnhandledExceptionEventArgs •) [0x00006] in <09623c708fdb40a483cea147bbea7a7f>:0