Hello. I use Fiddler classic. I have a problem please support. When i enable fiddler i can't access this site i get below error. How can I recover from this error? I am attaching the error screenshot.

[Fiddler] The connection to 'zone.game' failed.
System.Security.SecurityException Failed to negotiate HTTPS connection with server.fiddler.network.https> HTTPS handshake to zone.game (for #75) failed. System.Security.Authentication.AuthenticationException Ошибка вызова SSPI, см. внутреннее исключение. < Получено непредвиденное сообщение или оно имеет неправильный формат Win32 (SChannel) Native Error Code: 0x80090326

In the CONNECT response frame, we have the "Client Certificate" so we know there was a CERTIFICATE REQUEST made by the server as part of its SERVER HELLO response. What I would like to know is what DN(s)/CN(s) the server sent down with the CERTIFICATE REQUEST. I have not been able to find any references to pull this out of the SERVER HELLO response.

Environment:

FiddlerCore: v5.0.1

.Net: v6.0

Issue:

I've written a fiddle script to send another request to get the necessary info to proxy the original request via FidderClassic. It works fine with the tls1.2 protocol. But when I try to use FiddlerCore to do the same thing, I got the 502 error again(the error occured when I use FiddlerClassic without tls1.2 protocol).

Is there any insights for this issue? Thanks

Environment:

FiddlerCore Version: v5.0.1

.Net Version: .net6.0

windows： win11 22h2

Issue

My requirement is when I get the specific request, I need to send another request to get some extra info and then modify some parameters of the original request. I wrote a fiddler script to achieve that and it works fine by Fiddler Classic when I set the TLS1.2 for Https options.

But when I try to use FiddlerCore to do the same thing, I got the 502 error.

I followed https://www.telerik.com/blogs/fiddler-and-modern-tls-versions to set the protocols of connection to support the tls1.2, but it doesn't work!!

Is there anyone can help me figure out what should I do to to resolve this issue

i want to make fiddler auto responder with c# or vb.net or python console 

i have c# application get authentication from this url https://pastebin.com/raw/gFUrjSW3 and i want to change the string in the url (123456) to a specific string (112233445566) and i create this c# script but nothing happened 

When I tried to install the certificate with this function, it popped up and installed the certificate, but still reminded me when I tried to decrypt the https traffic
"To view the encrypted sessions inside this tunnel, enable the Tools > Options > HTTPS > Decrypt HTTPS traffic option."

public static bool InstallCertificate()
        {
            if (!CertMaker.rootCertExists())
            {
                if (!CertMaker.createRootCert())
                    return false;

                if (!CertMaker.trustRootCert())
                    return false;
            }

            return true;
        }

Is it because of this function? What should I do, please help me...

hello 

if (oSession.url.Contains("/api/v1/users/web_profile_info/?username=")) {
var directory: String = "d:\\aos\\";
var path: String = System.IO.Path.Combine(directory + "as.json");
oSession.utilDecodeResponse();
oSession.SaveResponseBody(path);
}

and result save file but file is empty .

How to save json result ?

Hi, I can't open some apps on ios. I enter the application, but fiddler does not scan the traffic. I am attaching a screenshot as an example. Screnshoot link  Please help me how to scan the sites mentioned in the picture.