Authentication failed because remote party has closed the transport stream

authentication failed because the remote party has closed the transport stream qlik sense
system net webexception remote prematurely closed connection
failed to authenticate https connection.
the underlying connection was closed: an unexpected error occurred on a send.
httpclient tls 1.2 c#
c# net servicepointmanager securityprotocol net securityprotocoltype tls12
the remote certificate is invalid according to the validation procedure.

I am developing a TCP client to connect OpenSSL server with the certificate authentication. I have using .crt and .key files shared by server team. These certificates are generated by OpenSSL commands.

I am using SslStream object to authenticate the Tcp client by calling SslStream.AuthenticateAsClient method by passing server IP, SslProtocols.Ssl3 and X509CertificateCollection.

I am getting the following error:

Authentication failed because the remote party has closed the transport stream


I would advise against restricting the SecurityProtocol to TLS 1.1.

The recommended solution is to use

System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls

Another option is add the following Registry key:

Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319 
Value: SchUseStrongCrypto 

It is worth noting that .NET 4.6 will use the correct protocol by default and does not require either solution.

Authentication failed because the remote party has closed the , failed because the remote party has closed the transport stream This issue started occuring at 3:03 PM and was interesting since other  C# Authentication failed because the remote party has closed the transport stream. I want to point out that I have searched a lot for this without a solution. So, I've created a loop that will go throw listBox2 that contains links, each time creating a http GET request in order to access the full source code.


If you want to use an older version of .net, create your own flag and cast it.

    //
    // Summary:
    //     Specifies the security protocols that are supported by the Schannel security
    //     package.
    [Flags]
    private enum MySecurityProtocolType
    {
        //
        // Summary:
        //     Specifies the Secure Socket Layer (SSL) 3.0 security protocol.
        Ssl3 = 48,
        //
        // Summary:
        //     Specifies the Transport Layer Security (TLS) 1.0 security protocol.
        Tls = 192,
        //
        // Summary:
        //     Specifies the Transport Layer Security (TLS) 1.1 security protocol.
        Tls11 = 768,
        //
        // Summary:
        //     Specifies the Transport Layer Security (TLS) 1.2 security protocol.
        Tls12 = 3072
    }
    public Session()
    {
        System.Net.ServicePointManager.SecurityProtocol = (SecurityProtocolType)(MySecurityProtocolType.Tls12 | MySecurityProtocolType.Tls11 | MySecurityProtocolType.Tls);
    }

How to fix the error "Authentication failed because the remote party , It is most likely caused by your application's default security protocol type being set too low. A lot of external APIs now expect requests using TLS 1.2 or above. You can easily set the SecurityProtocol in your application by adding this line: ServicePointManager. Authentication failed because the remote party has closed the transport stream June 6, 2019 December 11, 2019 Gunnar Peipman 2475 Views 1 Comment One beautiful day I found the following exception from application error logs: “Authentication failed because the remote party has closed the transport stream exception” and one of our integrations was down.


Adding the below code helped me overcome the issue.

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls11;

Authentication failed because the remote party has closed , Authentication failed because the remote party has closed the closed the transport stream exception” and one of our integrations was down. “Authentication failed because the remote party has closed the transport stream” for normal users Asked 3 years, 3 months ago A third party vendor is adding authentication (yay!), but it doesn't always work for us (boo!). When the C# application is run "as administrator" it works fine.


I ran into the same error message while using the ChargifyNET.dll to communicate with the Chargify API. Adding chargify.ProtocolType = SecurityProtocolType.Tls12; to the configuration solved the problem for me.

Here is the complete code snippet:

public ChargifyConnect GetChargifyConnect()
{
    var chargify = new ChargifyConnect();
    chargify.apiKey = ConfigurationManager.AppSettings["Chargify.apiKey"];
    chargify.Password = ConfigurationManager.AppSettings["Chargify.apiPassword"];
    chargify.URL = ConfigurationManager.AppSettings["Chargify.url"];

    // Without this an error will be thrown.
    chargify.ProtocolType = SecurityProtocolType.Tls12;

    return chargify;
}

System.IO.IOException: Authentication failed because the remote , NET result in Authentication failed because the remote party has closed the transport stream. We debugged for hours. It works within a console  WouterTinus changed the title Issue with Renewal - Authentication failed because the remote party has closed the transport stream Authentication failed because the remote party has closed the transport stream Jan 16, 2020


using (var client = new HttpClient(handler))
            {
                ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;
                var response = await client.SendAsync(new HttpRequestMessage(HttpMethod.Get, apiEndPoint)).ConfigureAwait(false);
                await response.Content.ReadAsStringAsync().ConfigureAwait(false);
            }

This worked for me

Error message: "Authentication failed because the remote party has , IOException: Authentication failed because the remote party has closed the transport stream. Search Knowledgebase. This error occurs on the testconfig page  APN fails with “Authentication failed because the remote party has closed the transport stream” 2 Authentication failed because the remote party has closed the transport stream


Remote party has closed the transport stream exception , Problem: When connecting to the archive the error message "Authentication failed because the remote party has closed the transport stream. SharePoint Authentication fails - Authentication failed because the remote party has closed the transport stream. #1709 alexmoraru25 opened this issue Oct 2, 2017 · 1 comment Comments


Get "Authentication failed because the remote party has closed the transport stream." exception when I call the following code: Subscription. Test failure: System.Net.Security tests failing with "Authentication failed because the remote party has closed the transport stream" Apr 3, 2018 davidsh self-assigned this May 22, 2018 davidsh closed this in dotnet/corefx#29875 May 23, 2018


Terminating app due to uncaught exception 'SIGABRT', reason: 'Authentication failed because the remote party has closed the transport stream