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2 answers
18 views

Hey,

currently trying the grpc Feature of Fiddler Everywhere. I have no Protofile (not sure if it is required at all).
But when I running Fiddler as Interceptor (I using Proxifer to reditrect traffic to Fiddler Everywhere)

it tells me: Incomplete Message on the Response.

When I run the App without Fiddler it works, so I assume Fiddler can't handle the grpc yet. Or is the Protofile required for him to handle  + forward the message?

Nick Iliev
Telerik team
 answered on 15 Mar 2024
1 answer
5 views

Good day,

 

so im running the trial versions, and it seems like i have to configure every device i want to monitor individually?

cant i point my router to fiddler and through that see all my connected devices?

Nick Iliev
Telerik team
 answered on 13 Mar 2024
1 answer
24 views

In my program; I use Fiddler Core. When ran on a pc; it set's the proxy as it should but when trying to browse the network with the proxy on; i'm getting "Your connection is Not private"; error message on all browsers. Please see attached photos for reference. Here is my running code:

 


private void stopfiddler()
{
    if (!FiddlerApplication.IsStarted())
    {
    }
    else
    {
        FiddlerApplication.Shutdown();
    }
}

public static void SavePreferences()
{

    Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
    string cert = ConfigurationManager.AppSettings["fiddler.certmaker.bc.cert"];
    string key = ConfigurationManager.AppSettings["fiddler.certmaker.bc.key"];
    if (cert == null || key == null)
    {
        config.AppSettings.Settings.Add("fiddler.certmaker.bc.cert", FiddlerApplication.Prefs.GetStringPref("fiddler.certmaker.bc.cert", null));
        config.AppSettings.Settings.Add("fiddler.certmaker.bc.key", FiddlerApplication.Prefs.GetStringPref("fiddler.certmaker.bc.key", null));
        config.Save(ConfigurationSaveMode.Modified);
        ConfigurationManager.RefreshSection("appSettings");
    }
    else
    {
        config.AppSettings.Settings["fiddler.certmaker.bc.cert"].Value = FiddlerApplication.Prefs.GetStringPref("fiddler.certmaker.bc.cert", null);
        config.AppSettings.Settings["fiddler.certmaker.bc.key"].Value = FiddlerApplication.Prefs.GetStringPref("fiddler.certmaker.bc.key", null);
        config.Save(ConfigurationSaveMode.Modified);
        ConfigurationManager.RefreshSection("appSettings");
    }
}

public static bool IsCertCreated()
{

    Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
    string cert = ConfigurationManager.AppSettings["fiddler.certmaker.bc.cert"];
    string key = ConfigurationManager.AppSettings["fiddler.certmaker.bc.key"];
    if (cert != null && key != null)
    {
        return true;
    }
    else
    {
        return false;
    }
}

public static void RemoveFiddlerPreferences()
{
    Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

    config.AppSettings.Settings.Remove("fiddler.certmaker.bc.cert");
    config.AppSettings.Settings.Remove("fiddler.certmaker.bc.key");

    config.Save(ConfigurationSaveMode.Modified);
    ConfigurationManager.RefreshSection(config.AppSettings.SectionInformation.Name);
}

public static void LoadPreferences()
{
    string cert = ConfigurationManager.AppSettings["fiddler.certmaker.bc.cert"];
    string key = ConfigurationManager.AppSettings["fiddler.certmaker.bc.key"];

    if (!string.IsNullOrEmpty(cert) && !string.IsNullOrEmpty(key))
    {
        FiddlerApplication.Prefs.SetStringPref("fiddler.certmaker.bc.cert", cert);
        FiddlerApplication.Prefs.SetStringPref("fiddler.certmaker.bc.key", key);
    }

}
private void Installcert()
{

    if (IsCertCreated())
    {
        
    }
    else
    {
        BCCertMaker.BCCertMaker certProvider = new BCCertMaker.BCCertMaker();
        certProvider.CreateRootCertificate();
        X509Certificate2 rootCert = certProvider.GetRootCertificate();
        // Create a certificate store and add the root certificate to it
        X509Store store = new X509Store(StoreName.Root, StoreLocation.LocalMachine);
        store.Open(OpenFlags.ReadWrite);
        store.Add(rootCert);
        SavePreferences();
    }
}

private void Remove()
{
    using (var store = new X509Store(StoreName.Root, StoreLocation.LocalMachine))
    {
        store.Open(OpenFlags.ReadWrite);

        var certificatesToRemove = store.Certificates
            .Cast<X509Certificate2>()
            .Where(c => c.SubjectName.Name.ToLower().Contains("DO_NOT_TRUST_FiddlerRoot"))
            .ToList();

        foreach (var cert in certificatesToRemove)
        {
            string certPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, cert.Thumbprint + ".cer");
            if (File.Exists(certPath))
            {
                File.Delete(certPath);
            }

            store.Remove(cert);
        }
        RemoveFiddlerPreferences();
        store.Close();
        MessageBox.Show("Deleted");
    }
}

private void appentext(string value)
{
    if (InvokeRequired)
    {
        return;
    }
}

 

 

 

 

Nick Iliev
Telerik team
 answered on 26 Feb 2024
1 answer
15 views

During the process of downloading Fiddler, a black interface will flash up and I will be able to install it successfully. However, when I try to use the software, no matter how I start it, it cannot be opened.

Nick Iliev
Telerik team
 answered on 26 Feb 2024
1 answer
17 views

Good afternoon,

We have installed Fiddler Classic on a Windows 11 laptop specifying install directory within Program Files, as per https://feedback.telerik.com/fiddler/1441442-default-install-fiddler-for-all-users, and it is not installing correctly. It just dumps the files in the folder. No Start Menu entry anywhere, no entry in the machine Uninstall registry. Key is however created within the installing users Uninstall key. Same issues if the installer is sent via management software, e.g. SCCM. Only here there is no registry entry created at all. This does not follow basic principles for software for management in a corporate environment, or frankly any other environment than that of a skilled personal user.

I have searched your forum and there is nothing recent to this post for machine-wide / corporate installs. As this "solution" was from 2019 and advises that it may cause issues with extensions, I expect that now, 4-5 years later, you have since sorted your installer out?

Tried to uninstall manually from the install directory using your uninst file located there and this fails stating: "A Progress Telerik Fiddler Classic component appears to be running. Please close all Progress Telerik Classic-related applications and try again." There is no process running called Fiddler, and looking through the list there is nothing obviously linked to your software. System has been restarted and same issue. Had to login with another user to uninstall. This is not appropriate. Please provide a full listing of your processes. Quite frankly, your software is acting more like malware.

Do you have a machine-wide installer please? A working one. The current state for deployment of your software is appalling.

Regards,

Craig.

Nick Iliev
Telerik team
 answered on 21 Feb 2024
1 answer
13 views
How can I exempt all in FiddlerCore as if I was using the Win Config option in Fiddler Classic? Thank you in Advance!
Nick Iliev
Telerik team
 answered on 21 Feb 2024
1 answer
12 views
When i capture traffic and try to load something on the page i get logged out...... when i turn capturing off and reload the page everything is fine all pages load fine .... is this a Security issue like a WAF?? a Captcha issue ? or a Cloudflare Issue?  I have tls1.0, 1.1 and 1.2 enabled
Nick Iliev
Telerik team
 answered on 05 Feb 2024
1 answer
24 views
Hello, i have app using fiddler, and i have problem like in Subject. Proxy in windows settings turn on like normal but i can't see result of fiddler proxy. Im using windows 11. There's any way to fix that? Thanks! :) 
Nick Iliev
Telerik team
 answered on 22 Jan 2024
1 answer
31 views

I have a library that I'm testing out and the .Net Framework 4.6.2 project logs just fine with the normal app.config values.  When I set up the same project using .Net 6/7 I can't seem to get it to capture any packets.

I run netsh command under an elevated privilege command prompt before starting fiddler and then I run the debug mode in VS 2022 and see no entries come across fiddler.  

C:\WINDOWS\system32>netsh winhttp set proxy 127.0.0.1:8888

Current WinHTTP proxy settings:

    Proxy Server(s) :  127.0.0.1:8888
    Bypass List     :  (none)

The only way I can get it to log anything is to enable "Act as a system proxy on startup".  This isn't too practical as then I'm seeing all traffic, which is a lot.

The request is to an https-enabled site.

Is there something I need to do differently in this case?

All of the articles I have read points to this as the correct direction, but they are all 2019 or older.

 

 

Nick Iliev
Telerik team
 answered on 17 Jan 2024
1 answer
25 views
Hello.My Fiddler Classic Unable to capture traffic from Windows store.can you help me?
Rosen Vladimirov
Telerik team
 answered on 12 Jan 2024
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