Unable to negotiate <host> port 22, no matching key exchange / host key algorithm found. #406
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did you get an answer for this? Please help |
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Dis you checked the list of supported algorithms in the readme vs what the server is configured with? My guess the server is using Elliptical Curve key that the lib does not support
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On Apr 21, 2019, at 7:26 AM, SaddamBinSyed ***@***.***> wrote:
did you get an answer for this?
Please help
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many thanks for your reply. error message at the server end, Unable to negotiate with 172.28.102.92 port 53513: no matching host key type found. Their offer: ssh-rsa,ssh-dss [preauth] please advise, i am using below code, var connectionInfo = new ConnectionInfo(host, username, new PasswordAuthenticationMethod(username, password)); using (SftpClient sftpClient = new SftpClient(connectionInfo)) |
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What is your host key algorithm?
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On Apr 21, 2019, at 9:35 AM, SaddamBinSyed ***@***.***> wrote:
many thanks for your reply.
error message at the server end,
Unable to negotiate with 172.28.102.92 port 53513: no matching host key type found. Their offer: ssh-rsa,ssh-dss [preauth]
please advise,
i am using below code,
var connectionInfo = new ConnectionInfo(host, username, new PasswordAuthenticationMethod(username, password));
connectionInfo.Timeout = new TimeSpan(0, 0, 20); // connection Timeout
using (SftpClient sftpClient = new SftpClient(connectionInfo))
{
sftpClient.HostKeyReceived += SftpClient_HostKeyReceived;
sftpClient.ErrorOccurred += SftpClient_ErrorOccurred;
Console.WriteLine("Connecting to server");
sftpClient.Connect();
Console.WriteLine("connected");
//using (FileStream fs = new FileStream("filePath", FileMode.Open))
//{
// sftpClient.BufferSize = 1024;
// sftpClient.UploadFile(fs, Path.GetFileName("filePath"));
//}
sftpClient.Dispose();
}
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sorry for asking, where can i see that information ( key algorithim)? |
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When I try to connect with the server then I am getting the below error. please help. Renci.SshNet.Common.SshConnectionException: An existing connection was forcibly closed by the remote host ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host |
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At least from the error my guess is that you will have to reconfigure the server to use a key with one of the supported algorithms by the library
…Sent from my iPhone
On Apr 21, 2019, at 9:35 AM, SaddamBinSyed ***@***.***> wrote:
many thanks for your reply.
error message at the server end,
Unable to negotiate with 172.28.102.92 port 53513: no matching host key type found. Their offer: ssh-rsa,ssh-dss [preauth]
please advise,
i am using below code,
var connectionInfo = new ConnectionInfo(host, username, new PasswordAuthenticationMethod(username, password));
connectionInfo.Timeout = new TimeSpan(0, 0, 20); // connection Timeout
using (SftpClient sftpClient = new SftpClient(connectionInfo))
{
sftpClient.HostKeyReceived += SftpClient_HostKeyReceived;
sftpClient.ErrorOccurred += SftpClient_ErrorOccurred;
Console.WriteLine("Connecting to server");
sftpClient.Connect();
Console.WriteLine("connected");
//using (FileStream fs = new FileStream("filePath", FileMode.Open))
//{
// sftpClient.BufferSize = 1024;
// sftpClient.UploadFile(fs, Path.GetFileName("filePath"));
//}
sftpClient.Dispose();
}
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… Sent from my iPhone
On Apr 21, 2019, at 9:45 AM, SaddamBinSyed ***@***.***> wrote:
When I try to connect with the server then I am getting the below error.
please help.
Renci.SshNet.Common.SshConnectionException: An existing connection was forcibly closed by the remote host ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at Renci.SshNet.Abstractions.SocketAbstraction.Read(Socket socket, Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)
at Renci.SshNet.Session.TrySocketRead(Byte[] buffer, Int32 offset, Int32 length)
at Renci.SshNet.Session.ReceiveMessage()
at Renci.SshNet.Session.MessageListener()
--- End of inner exception stack trace ---
at Renci.SshNet.Session.WaitOnHandle(WaitHandle waitHandle, TimeSpan timeout)
at Renci.SshNet.Session.WaitOnHandle(WaitHandle waitHandle)
at Renci.SshNet.Session.Connect()
at Renci.SshNet.BaseClient.Connect()
at FtpEngine.ftp.Upload.UploadFilestoSFTPUsingSSH(tb_ftpconfig _configs)
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ssh-dss - ssh-rsa |
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When run the below command i can am getting the following PS C:\Users\duak5031> ssh -Q key please advise |
So what I understood is, we need to add the library supported key algorithm in to SFTP server config files? please help |
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I have added below config to the sshconfig file HostKeyAlgorithms +ssh-rsa,ssh-dss |
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In the next beta, we'll add support for the following key exchange algorithms:
and we've added support for the following host key algorithms:
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2020.0.0-beta1 is now available. |
Getting an error on sshClient.Connect().
Does library supports ssh-dss host key algorithm? Though it supports diffie-hellman-group1-sha1, why i am getting no matching key exchange method found error?
Unable to negotiate with XXXXXX port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1
Unable to negotiate with XXXXXX port 22: no matching host key type found. Their offer: ssh-dss
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