When I try to run fiddler setup nothing happens.  A trip over to the event viewer under Application I get warning Event 866 from SoftwareRestrictionPolicies :

Access to C:\Users\username\AppData\Local\Temp\Fiddler4Setup.exe has been restricted by your Administrator by location with policy rule {542edcef-766b-4b80-94e2-42e180f6675d} placed on path C:\Users\username\AppData\Local\*\*.exe.

 

It appears as if this program installer is trying to use the AppData\Local\Temp folder to run executables out of.  This is a big no no and poor programming design.  It is not good practice to install this way as its the cheap and easy way out.  This location is a prime target for malware and ransomware to deposit their payloads and execute.  Therefore we have SRP in place to block the execution of files from this location.  It has saved our arses one time before as it successfully prevented malware from running.

Can any devs try to redesign the installer to utilize a more modern and Microsoft sanctioned way to do an install?  We have many programs that install without issue because they do not take the cheap and easy way out.

Hi,

 

I keep gettiing this error anytime i attempt to open fiddler.

 

---------------------------
Awww, Fiddlesticks!
---------------------------
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.

Cannot load the "comctl32.dll" DLL into memory.

Type: System.ComponentModel.Win32Exception
Source: System.Windows.Forms
   at System.Windows.Forms.Control.get_CreateParams()
   at System.Windows.Forms.ScrollableControl.get_CreateParams()
   at System.Windows.Forms.ContainerControl.get_CreateParams()
   at System.Windows.Forms.Form.get_CreateParams()
   at .ž“.›“() in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\SplashScreen.cs:line 62
   at System.Windows.Forms.Control..ctor(Boolean autoInstallSyncContext)
   at System.Windows.Forms.ScrollableControl..ctor()
   at System.Windows.Forms.ContainerControl..ctor()
   at System.Windows.Forms.Form..ctor()
   at .ž“..ctor() in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\SplashScreen.cs:line 22
   at Fiddler.frmViewer.‹•(String[] ˆ•) in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Viewer.cs:line 2763
   at Fiddler.frmViewer.‡•(String[] ˆ•) in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Viewer.cs:line 2717
Fiddler v4.6.20171.9220 (x64 AMD64) [.NET 4.0.30319.42000 on Microsoft Windows NT 10.0.14393.0] 
---------------------------
OK   
---------------------------

Hi,

Thanks for Fiddler and Fiddlercore. I use Fiddler to inspect websocket messages but not all messages are readable.

some message are readable but some are in this format :    j 0p { <  D  A  ZO vұ ....

What's happening as I'm not a real developer ...

Thanks

 

>uname -a
Linux Computername 4.8.0-46-generic #49-Ubuntu SMP Fri Mar 31 13:57:14 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

>cat /etc/os-release

NAME="Ubuntu"
VERSION="16.10 (Yakkety Yak)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.10"
VERSION_ID="16.10"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="http://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=yakkety
UBUNTU_CODENAME=yakkety

>mono --version

Mono JIT compiler version 4.8.0 (Stable 4.8.0.524/9d74414 Wed Apr 5 17:57:04 UTC 2017)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
TLS: __thread
SIGSEGV: altstack
Notifications: epoll
Architecture: amd64
Disabled: none
Misc: softdebug 
LLVM: supported, not enabled.
GC: sgen

On exiting:
---------------------------
Awww, Fiddlesticks!
---------------------------
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.
Exception has been thrown by the target of an invocation.
Type: System.Reflection.TargetInvocationException
Source: mscorlib
at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters) [0x00019] in <f712f98eb8e445c8918edaf595bbe465>:0 
at System.RuntimeType.CreateInstanceMono (System.Boolean nonPublic) [0x000ca] in <f712f98eb8e445c8918edaf595bbe465>:0 
at System.RuntimeType.CreateInstanceSlow (System.Boolean publicOnly, System.Boolean skipCheckThis, System.Boolean fillCache, System.Threading.StackCrawlMark& stackMark) [0x0001a] in <f712f98eb8e445c8918edaf595bbe465>:0 
at System.RuntimeType.CreateInstanceDefaultCtor (System.Boolean publicOnly, System.Boolean skipCheckThis, System.Boolean fillCache, System.Threading.StackCrawlMark& stackMark) [0x0002a] in <f712f98eb8e445c8918edaf595bbe465>:0 
at System.Activator.CreateInstance (System.Type type, System.Boolean nonPublic) [0x00040] in <f712f98eb8e445c8918edaf595bbe465>:0 
at System.Configuration.ConfigInfo.CreateInstance () [0x00029] in <c88268b2ab694baf8f53384cac3b8843>:0 
at System.Configuration.SectionInfo.CreateInstance () [0x00000] in <c88268b2ab694baf8f53384cac3b8843>:0 
at System.Configuration.Configuration.GetSectionInstance (System.Configuration.SectionInfo config, System.Boolean createDefaultInstance) [0x00022] in <c88268b2ab694baf8f53384cac3b8843>:0 
at System.Configuration.ConfigurationSectionCollection.get_Item (System.String name) [0x00032] in <c88268b2ab694baf8f53384cac3b8843>:0 
at System.Configuration.Configuration.GetSection (System.String path) [0x00021] in <c88268b2ab694baf8f53384cac3b8843>:0 
at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection (System.String configKey) [0x00006] in <c88268b2ab694baf8f53384cac3b8843>:0 
at System.Configuration.ConfigurationManager.GetSection (System.String sectionName) [0x00005] in <c88268b2ab694baf8f53384cac3b8843>:0 
at System.Configuration.PrivilegedConfigurationManager.GetSection (System.String sectionName) [0x00000] in <5641e4edad4f4464ba58c620a7b8ea48>:0 
at System.Diagnostics.DiagnosticsConfiguration.GetConfigSection () [0x00000] in <5641e4edad4f4464ba58c620a7b8ea48>:0 
at System.Diagnostics.DiagnosticsConfiguration.Initialize () [0x00033] in <5641e4edad4f4464ba58c620a7b8ea48>:0 
at System.Diagnostics.DiagnosticsConfiguration.get_IndentSize () [0x00000] in <5641e4edad4f4464ba58c620a7b8ea48>:0 
at System.Diagnostics.TraceInternal.InitializeSettings () [0x00060] in <5641e4edad4f4464ba58c620a7b8ea48>:0 
at System.Diagnostics.TraceInternal.get_UseGlobalLock () [0x00000] in <5641e4edad4f4464ba58c620a7b8ea48>:0 
at System.Diagnostics.TraceInternal.WriteLine (System.String message) [0x00000] in <5641e4edad4f4464ba58c620a7b8ea48>:0 
at System.Diagnostics.Trace.WriteLine (System.String message) [0x00000] in <5641e4edad4f4464ba58c620a7b8ea48>:0 
at Fiddler.FiddlerApplication.ReportException (System.Exception eX, System.String sTitle, System.String sCallerMessage) [0x00059] in <1f5c91af40d14c0eb3b0cb76da0ecdcc>:0 
at Fiddler.FiddlerApplication.ReportException (System.Exception eX, System.String sTitle) [0x00000] in <1f5c91af40d14c0eb3b0cb76da0ecdcc>:0 
at .ƒ.ž () [0x0002e] in <1f5c91af40d14c0eb3b0cb76da0ecdcc>:0 
at System.Threading.ThreadHelper.ThreadStart_Context (System.Object state) [0x00017] in <f712f98eb8e445c8918edaf595bbe465>:0 
at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x0008d] in <f712f98eb8e445c8918edaf595bbe465>:0 
at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <f712f98eb8e445c8918edaf595bbe465>:0 
at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state) [0x00031] in <f712f98eb8e445c8918edaf595bbe465>:0 
at System.Threading.ThreadHelper.ThreadStart () [0x0000b] in <f712f98eb8e445c8918edaf595bbe465>:0
System.Threading.ThreadAbortException
at (wrapper managed-to-native) System.Reflection.MonoCMethod:InternalInvoke (System.Reflection.MonoCMethod,object,object[],System.Exception&)
at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters) [0x00002] in <f712f98eb8e445c8918edaf595bbe465>:0 
Fiddler v4.6.20171.14978 (x64 ) [.NET 4.0.30319.42000 on Unix 4.8.0.46]

Configuration changed:

Tools -> Telerik Fiddler Options -> Tab "HTTPS"

- [checked] Capture HTTPS CONNECTs

- [checked] Decrypt HTTPS traffic -> ...from browsers only

- [changed] "Perform decryption" only for the following host: <site to decrypt only>

(BTW: The text for the option above ["Perform decryption"] appears cut off, only around 2/3 of the label is visible )

 

I am setting up a reverse proxy, and I've got everything working except the correct SSL cert. When I try to do the following:

```

    static function Main() {
        var today: Date = new Date();
        FiddlerObject.StatusText = " CustomRules.js was loaded at: " + today;

        //CertMaker.removeFiddlerGeneratedCerts();
        FiddlerObject.log("Main - Start StoreCerts");
         var oCert = new System.Security.Cryptography.X509Certificates
            .X509Certificate2("C:\\temp\\geotrust.pfx", "*****");
        FiddlerObject.log("FriendlyName: " + oCert.FriendlyName);
        FiddlerObject.log("Issuer: " + oCert.Issuer);
        FiddlerObject.log("PrivateKey: " + oCert.HasPrivateKey.ToString());
        FiddlerObject.log("Subject: " + oCert.Subject);
        CertMaker.StoreCert("wdtest.casepacer.com", oCert);
        FiddlerObject.log("Main - End StoreCerts");
        var test = CertMaker.FindCert("wdtest.casepacer.com")
        FiddlerObject.log("FriendlyName: " + test.FriendlyName);
        FiddlerObject.log("Issuer: " + test.Issuer);
```

The output I get is this:

```

17:25:45:1722 Main - Start StoreCerts
17:25:45:1722 FriendlyName: GeoTrustCP
17:25:45:1722 Issuer: CN=GeoTrust SSL CA - G3, O=GeoTrust Inc., C=US
17:25:45:1722 PrivateKey: True
17:25:45:1722 Subject: CN=*.casepacer.com, O=Case Pacer LLC, L=Indianapolis, S=Indiana, C=US
17:25:45:1722 Assembly 'C:\Program Files (x86)\Fiddler2\CertMaker.dll' was not found. Using default Certificate Generator.
17:25:45:1722 /Fiddler.CertMaker> Using .‰+˜ for certificate generation; UseWildcards=True.
17:25:45:1722 Main - End StoreCerts
17:25:45:1722 FriendlyName:
17:25:45:1722 Issuer: CN=DO_NOT_TRUST_FiddlerRoot, O=DO_NOT_TRUST, OU=Created by http://www.fiddler2.com

```

I added the loggers so that I could verify that it was correctly reading the cert (which it is), and that it has the private key (which it does). This is the same key I'm using on my IIS instance on the same machine, so I know it works. However, when I try to connect, or as you can see in the script when I tell it to FindCert(), It gets the DO_NOT_TRUST cert instead of the one I'm trying to add/specify.

I've even tried deleting the DO_NOT_TRUST certs, but it just recreates them. Why won't it use the cert I'm loading?

Thanks in advance,

David

We have a small program created for us that we install locally on windows. I don't have access to the code or database. 

When I log in, Fiddler detects some traffic, but detects nothing while using the program. It most certainly is posting and fetching data from remote servers. Why would Fiddler not see this traffic?

I know I haven't provided a ton of info but perhaps there are some things I can look out for?

Hi, I would like to report a bug in the Fiddler4.

I've attached a stack trace which is meaningful and sufficient in my opinion.

The issue was discovered over heavy usage of http post method.

 

Affected version: Telerik Fiddler Web Debugger (v4.6.3.44034) 64-bit AMD64

 

Regards,

Przemyslaw

I've used Fiddler sometime last year when Fiddler 2 existed. I decided the re download it for a project and was introduced to "Fiddler 4". Now with this new one there's a "read only" at the right bottom and I'm trying to figure out how can I disable that so I'll be able to use "break on response" etc 

Windows 7 SP1 x32 .NET 4.6

After installation and attempt to launch the Fiddler 4.5.1.6 I get this system message:

 

The version of this file is not compatible with the version of Windows you're running. Check your computer's system information to see whether you need an x86 (32-bit) or x64 (64-bit) version of the program and then contact the software publisher.

 

What have I done wrong?​

I have been using Fiddler to debug some application https communication (from C# & C++ apps in Visual Studio, Java apps in Eclipse, and Android apps in the emulator).  I managed to enable Fiddler for all of those scenarios, but in retrospect I should have written down what I was doing each step of the way.

Now, I find that unless Fiddler is running my outlook won't connect.  Gah!  (All of my browsers work with or without Fiddler ... it just seems to affect Outlook)

I'd like to be able to access my email without starting Fiddler...