MyKeySoftMK

Thanks for your reply. The problem is: our customer allow only connections with TLS1.3. I have disable `EnableThreadSafeDataConnections ` - but no success In FileZilla the connection is working fine...

Thanks for your work. Here is the log of your new BETA1-Version _ AutoConnect() AutoDetect(True, False) Connect() Status: Connecting to x.x.x.x:21 Response: 220 NASFTPD Turbo station 1.3.6 Server (ProFTPD) [::ffff:10.1.10.6]...

> Can you call `AutoDetect()[0].ToCode()` and show me the code here? `Ausnahme ausgelöst: "System.ArgumentOutOfRangeException" in System.Private.CoreLib.dll` I think that they didn´t find any possible Connection, so the array is empty

> See what I am doing in AutoConnect is catching this error `Authentication failed because the remote party sent a TLS alert: 'ProtocolVersion'.` and then using TLS 1.3. Can you...

> Try this... > > [FluentFTP.39.1.1-BETA2.zip](https://github.com/robinrodricks/FluentFTP/files/9276355/FluentFTP.39.1.1-BETA2.zip) At moment I only use following settings: ` With FTPSClnt .Host = FtpServer.ServerAdress .Credentials = New Net.NetworkCredential(FtpServer.UserName, FtpServer.Password) .EncryptionMode = FtpEncryptionMode.Explicit .Port = FtpServer.Port...

When I use 'AutoConnect()' then I have the same behavior like BETA1. - No Exception - No Connection - Same log-infos like BETA1

> Please try this with AutoConnect... > > [FluentFTP.39.1.1-BETA3.zip](https://github.com/robinrodricks/FluentFTP/files/9276607/FluentFTP.39.1.1-BETA3.zip) Sorry - same as before. No connection is possible

Sorry - i cann´t give you a reply now. Our customers FTP-Server is down till Tuesday. On Wednesday i can try again. Then I will send you the result

Hello, now I can test your suggestion. But they didn´t work. But I have a new Errormessage: `Der Client und der Server können keine Daten austauschen, da sie nicht über...

> Its hard for me to debug this because I don't have a server like yours at hand to test TLS 1.3, so I have to guess what the issue...