Hi,

 

I've set everything up as per the Telerik guides but Fiddler is still not decrypting the traffic on any of the browsers I tested: IE, Firefox, Chrome.

 

Here is what I have done:

 

- Launched Fiddler as admin

- Added Fiddler root cert to Windows Cert store and Firefox's own managed cert store

- Activated the HTTPS decryption in the Fiddler options

- Verified that browser proxy is configured to localhost:8888

 

I'm running Fiddler on Windows Server 2012 R2

 

Thanks

 

 

Starting yesterday, Fiddler has begun automatically closing when I attempt to save "All Sessions" - it then reopens, with none of the sessions previously captured. I attempted to close and reopen, and then attempted a clean install. I'm continuing to have these issues. Anyone else have ideas about what might be doing this?

I have been looking online for multiple hours now and none of the other forum threads have worked. When I have fiddler open with https decryption enabled, and the certificate trusted, it makes my internet stop working and does not decrypt anything. I have resetted the certificate and tried to uninstall, but fiddler does not show up in the installed program list. How do I uninstall fiddler or get my https decryption working?

Hello

Thank you for making this awesome piece of software. I have used it many times before, and this is the first time where I actually can't get Fiddler to record any HTTPS traffic from league of legends.

 

What i want: Record all HTTPS requests that are getting sent by League of legends to their servers, using the League of Legends client. (The client is the only place where you can actually see the information that i need).

What does not work: I am quite sure that League of Legends does NOT use windows default proxy, and therefore does not get picked up by Fiddler. I am not quite sure if they use SSL-Pinning, I dont think they do - but i might be wrong. Each time I try to boot up League of legends I just see the HTTP tunnel without any HTTPS requests in between.

 

What i have tried:

- Tried forcing League of legends to use the proxy 127.0.0.1:8888 for it to go through fiddler. This is where I see only HTTP tunnels with instant connection closed. It also gave me the warning "Do you want to trust this certificate bla bla bla."

- Tried using ProxyCap and Your freedom to make rules to route all the data through fiddler using 127.0.0.1:8888.

- Tried to add an environment variable to my system settings called "all_proxy" with the value of 127.0.0.1:8888 to again make it go through fiddler.

 

I have attached two images, one showing my HTTP tunnels and one showing that I can receive HTTPS requests from other apps such as ShareX in this example.

Still no luck... What should I do in order to actually see the HTTPS Requests between the HTTP Tunnels? Thanks.

I'm just a game analyzer as my hobby. I check any Android games to see how it works and if game collect data or not

There is a problem with Fiddler 2 that i don't understand. It does not capture traffics from some games like it goes through Fiddler without Fiddler2 is seeing. No certificate, no any errors. game works fine without captured traffic

I have ensure that I have enabled proxy on Android system, have certificate installed, and check if https decryption is working. All fine. I have reseted cert and fiddler 2 but it doesn't help

All i got is traffic from ads.

Fiddler 2 does work with most of other online games. I just can't find out why Fiddler2 can't capture traffic of some game.

Can you please help me with this problem?

 

Here is screenshot of google.com https decryption: https://imgur.com/e9HtX5M

Here is screenshot of game that does not work with fiddler 2 but with just traffics from ads: https://imgur.com/YKghx9v

Here is screenshot of game with captured traffics https://imgur.com/8e1k4UL

 

 

I would like to have users in my company use Fiddler to record web interactions and then export them to Visual Studio webtests. Obviously, this would remove the necessity for many users to have licenses for Visual Studio Enterprise (not inexpensive).

However, my company's website has lots of dependent requests. Visual Studio Enterprise, for the most part, correctly recognizes dependent requests and groups them underneath their parent request after a recording is complete. Fiddler unfortunately does not.

At Sean Lumley's blog at https://blogs.msdn.microsoft.com/slumley/2007/04/17/writing-fiddler-web-test-plugins/ I can see an example for writing a Fiddler webtest-export plugin. I have created webtest plugins before, so this looks like a good option.

Are there any other things I need to know before starting out? Has a dependent request plugin already been written? Unfortunately, I'm not even aware of the algorithm Visual Studio uses for correctly sorting dependent requests.

Hello forum

We intend to use a data recovery software running under Windows which sends "telemetric data" back home (this is declared from the manufacturer). Of course we would like to know everything what this application does...

In the Fiddler docs, different setups are described (e.g. capture traffic from another machine, decrypt traffic from a hostname only)



Question:

What is a good approch to find out, how this application does encrypt it's telemetric data and what kind of "transport-encryption" it does use
(in order to be able to setup a working Fiddler environment)?



Thank you very much for any feedback!

Joe



PS:
I don't want to mention the name of the application in question, in order to prevent the manufacturer to circumvent our efforts :-)

hi whats the code for c# and fiddlercore to have unmatched requests passthrough like in regular fiddler ?

 

cheers

I use Fiddler occasionally. Some time ago it started to offer an update on startup, I agreed, it downloaded new version but ended up with warning attached as a picture.

The message says: The update is not signed by Telerik.

Do I have hacked version of Fiddler or is it the update what is trying to inject some kind of malformed code?

Hello, With recent updates of fiddler it seems as if there are issues running on Windows server core.  (See below for exception from the JIT.)  This hasn't always been the case; I have an installer for an older version that runs just fine.  Is this a known limitation?  any workarounds (besides using an outdated version that I only have access to accidentally)?

Thanks!

Mike

 

See the end of this message for details on invoking 
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.Runtime.InteropServices.COMException (0x80040154): Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))
   at System.Windows.Forms.UnsafeNativeMethods.CoCreateInstance(Guid& clsid, Object punkOuter, Int32 context, Guid& iid)
   at System.Windows.Forms.WebBrowserBase.TransitionFromPassiveToLoaded()
   at System.Windows.Forms.WebBrowserBase.TransitionUpTo(AXState state)
   at System.Windows.Forms.WebBrowser.get_AxIWebBrowser2()
   at System.Windows.Forms.WebBrowser.set_AllowWebBrowserDrop(Boolean value)
   at .Š.›–() in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Report.cs:line 449
   at .Š..ctor() in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Report.cs:line 82
   at Fiddler.frmViewer.š(Object , EventArgs ) in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Viewer.cs:line 9741
   at System.Windows.Forms.Form.OnLoad(EventArgs e)
   at System.Windows.Forms.Form.OnCreateControl()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.Form.WmShowWindow(Message& m)
   at Fiddler.frmViewer.WndProc(Message& m) in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Viewer.cs:line 12356
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.2117.0 built by: NET47REL1LAST
    CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/mscorlib.dll
----------------------------------------
Fiddler
    Assembly Version: 4.6.20173.38786
    Win32 Version: 4.6.20173.38786
    CodeBase: file:///C:/Fiddler/Fiddler.exe
----------------------------------------
System
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.2114.0 built by: NET47REL1LAST
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Core
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.2117.0 built by: NET47REL1LAST
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll
----------------------------------------
System.Windows.Forms
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.2114.0 built by: NET47REL1LAST
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.2053.0 built by: NET47REL1
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Configuration
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.2053.0 built by: NET47REL1
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
System.Xml
    Assembly Version: 4.0.0.0
    Win32 Version: 4.7.2102.0 built by: NET47REL1LAST
    CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
Xceed.Zip.v5.4
    Assembly Version: 5.4.13572.13590
    Win32 Version: 5.4.13572.13590
    CodeBase: file:///C:/Fiddler/Xceed.Zip.v5.4.DLL
----------------------------------------
Xceed.Compression.Formats.v5.4
    Assembly Version: 5.4.13572.13590
    Win32 Version: 5.4.13572.13590
    CodeBase: file:///C:/Fiddler/Xceed.Compression.Formats.v5.4.DLL
----------------------------------------
Xceed.FileSystem.v5.4
    Assembly Version: 5.4.13572.13590
    Win32 Version: 5.4.13572.13590
    CodeBase: file:///C:/Fiddler/Xceed.FileSystem.v5.4.DLL
----------------------------------------
Xceed.Compression.v5.4
    Assembly Version: 5.4.13572.13590
    Win32 Version: 5.4.13572.13590
    CodeBase: file:///C:/Fiddler/Xceed.Compression.v5.4.DLL
----------------------------------------
Telerik.Analytics
    Assembly Version: 4.0.104.0
    Win32 Version: 4.0.104
    CodeBase: file:///C:/Fiddler/Telerik.Analytics.DLL
----------------------------------------

************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.

For example:

<configuration>
    <system.windows.forms jitDebugging="true" />
</configuration>

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.