public class FileZillaTests
    {
        [Fact]
        public async Task We_should_be_able_to_connect_and_list_files()
        {
            FtpTrace.LogToFile = "fluentftp.log";
            var client = new FluentFTP.FtpClient("localhost", "test", "test")
            {
                EncryptionMode = FluentFTP.FtpEncryptionMode.Explicit
            };
            client.ValidateCertificate += (context, e) => { e.Accept = true; };
            var files = await client.GetListingAsync("/");
            Assert.NotEmpty(files);
        }
    }

[xUnit.net 00:00:03.8585874]     FileTransfer.Tests.FileZillaTests.We_should_be_able_to_connect_and_list_files [FAIL]
Fehler FileTransfer.Tests.FileZillaTests.We_should_be_able_to_connect_and_list_files
Fehlermeldung:
 System.IO.IOException : Authentication failed because the remote party has closed the transport stream.
Stapelverfolgung:
   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.PartialFrameCallback(AsyncProtocolRequest asyncRequest)
--- End of stack trace from previous location where exception was thrown ---
   at System.Net.Security.SslState.ThrowIfExceptional()
   at System.Net.Security.SslState.InternalEndProcessAuthentication(LazyAsyncResult lazyResult)
   at System.Net.Security.SslState.EndProcessAuthentication(IAsyncResult result)
   at System.Net.Security.SslStream.EndAuthenticateAsClient(IAsyncResult asyncResult)
   at System.Net.Security.SslStream.<>c.<AuthenticateAsClientAsync>b__46_2(IAsyncResult iar)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown ---
   at FluentFTP.FtpSocketStream.ActivateEncryptionAsync(String targethost, X509CertificateCollection clientCerts, SslProtocols sslProtocols)
   at FluentFTP.FtpClient.OpenPassiveDataStreamAsync(FtpDataConnectionType type, String command, Int64 restart)
   at FluentFTP.FtpClient.OpenDataStreamAsync(String command, Int64 restart)
   at FluentFTP.FtpClient.GetListingAsync(String path, FtpListOption options)
   at FileTransfer.Tests.FileZillaTests.We_should_be_able_to_connect_and_list_files() in /mnt/c/workspace/lib-cs-filetransfer/FileTransfer.Tests/FileZillaTests.cs:line 20
--- End of stack trace from previous location where exception was thrown ---

# GetListingAsync("/", Auto)
# Connect()
Status:   Connecting to 127.0.0.1:21
Response: 220 Please visit https://filezilla-project.org/
Response: 220-FileZilla Server 0.9.60 beta
Response: 220-written by Tim Kosse (tim.kosse@filezilla-project.org)
Command:  AUTH TLS
Response: 234 Using authentication type TLS
Status:   FTPS Authentication Successful
Status:   Time to activate encryption: 0h 0m 0s.  Total Seconds: 0,8153198.
Command:  USER test
Response: 331 Password required for test
Command:  PASS ***
Response: 230 Logged on
Command:  PBSZ 0
Response: 200 PBSZ=0
Command:  PROT P
Response: 200 Protection level set to P
Command:  FEAT
Response: 211 End
Response: 211-Features:
Response: MDTM
Response: REST STREAM
Response: SIZE
Response: MLST type*;size*;modify*;
Response: MLSD
Response: AUTH SSL
Response: AUTH TLS
Response: PROT
Response: PBSZ
Response: UTF8
Response: CLNT
Response: MFMT
Response: EPSV
Response: EPRT
Status:   Text encoding: System.Text.UTF8Encoding+UTF8EncodingSealed
Command:  OPTS UTF8 ON
Response: 202 UTF8 mode is always enabled. No need to send this command.
Command:  SYST
Response: 215 UNIX emulated by FileZilla
Status:   Auto-detected UNIX listing parser
Command:  TYPE I
Response: 200 Type set to I
# OpenPassiveDataStreamAsync(AutoPassive, "MLSD /", 0)
Command:  EPSV
Response: 229 Entering Extended Passive Mode (|||58695|)
Status:   Connecting to 127.0.0.1:58695
Command:  MLSD /
Response: 150 Opening data channel for directory listing of "/"
Status:   Disposing FtpSocketStream...

(000010)14.11.2018 22:27:52 - (not logged in) (127.0.0.1)> Connected on port 21, sending welcome message...
(000010)14.11.2018 22:27:52 - (not logged in) (127.0.0.1)> 220-FileZilla Server 0.9.60 beta
(000010)14.11.2018 22:27:52 - (not logged in) (127.0.0.1)> 220-written by Tim Kosse (tim.kosse@filezilla-project.org)
(000010)14.11.2018 22:27:52 - (not logged in) (127.0.0.1)> 220 Please visit https://filezilla-project.org/
(000010)14.11.2018 22:27:52 - (not logged in) (127.0.0.1)> AUTH TLS
(000010)14.11.2018 22:27:52 - (not logged in) (127.0.0.1)> 234 Using authentication type TLS
(000010)14.11.2018 22:27:52 - (not logged in) (127.0.0.1)> TLS connection established
(000010)14.11.2018 22:27:53 - (not logged in) (127.0.0.1)> USER test
(000010)14.11.2018 22:27:53 - (not logged in) (127.0.0.1)> 331 Password required for test
(000010)14.11.2018 22:27:53 - (not logged in) (127.0.0.1)> PASS ****
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> 230 Logged on
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> PBSZ 0
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> 200 PBSZ=0
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> PROT P
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> 200 Protection level set to P
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> FEAT
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> 211-Features:
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  MDTM
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  REST STREAM
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  SIZE
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  MLST type*;size*;modify*;
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  MLSD
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  AUTH SSL
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  AUTH TLS
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  PROT
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  PBSZ
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  UTF8
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  CLNT
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  MFMT
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  EPSV
(000010)14.11.2018 22:27:53 - test (127.0.0.1)>  EPRT
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> 211 End
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> OPTS UTF8 ON
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> 202 UTF8 mode is always enabled. No need to send this command.
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> SYST
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> 215 UNIX emulated by FileZilla
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> TYPE I
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> 200 Type set to I
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> EPSV
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> 229 Entering Extended Passive Mode (|||58695|)
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> MLSD /
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> 150 Opening data channel for directory listing of "/"
(000010)14.11.2018 22:27:53 - test (127.0.0.1)> 450 TLS session of data connection has not resumed or the session does not match the control connection
(000010)14.11.2018 22:27:55 - test (127.0.0.1)> disconnected.