SFTP using WinSCP .NET timeouts in C# when connecting to port 2222

Question

I can connect to SFTP using the FileZilla in a machine, in the same machine when I try to connect via C# code it gives error as

Network error: Connection to "fs2.comparethemarket.com" timed out

SFTP port used for connection;2222

Code I am using

SessionOptions sessionOptions = new SessionOptions();
if (_strftpprotocol=="SFTP")
{
    sessionOptions.Protocol = WinSCP.Protocol.Sftp; 
}
else if(_strftpprotocol == "FTP")
{
    sessionOptions.Protocol = WinSCP.Protocol.Ftp;
    sessionOptions.FtpSecure = FtpSecure.Explicit;
}
sessionOptions.HostName = _strftpURL;
sessionOptions.UserName = _strftpUserName;
sessionOptions.Password = _strftpPassword;

if (_strftpprotocol == "SFTP")
{
    if (string.IsNullOrEmpty(_strftpSSHKey))
    {
        if (string.IsNullOrEmpty(_strftpKeyPath))
        {
            sessionOptions.GiveUpSecurityAndAcceptAnySshHostKey = true;

        }
        else
        {
            privatekeyFilePath = privatekeyFilePath + _strftpKeyPath;
            sessionOptions.SshPrivateKeyPath = privatekeyFilePath;

            if (!string.IsNullOrEmpty(_strFTPPrivateKeyPassphrase))
            {
                sessionOptions.PrivateKeyPassphrase = _strFTPPrivateKeyPassphrase;
            }
            
            if (!string.IsNullOrEmpty(_strFTPSshHostKeyFingerprint))
            {
                sessionOptions.SshHostKeyFingerprint = _strFTPSshHostKeyFingerprint;
            }
        }
    }
    else
    {

        if (string.IsNullOrEmpty(_strftpKeyPath))
        {
            sessionOptions.SshHostKeyFingerprint = _strftpSSHKey;
        }
        else
        {
            privatekeyFilePath = privatekeyFilePath + _strftpKeyPath;
            sessionOptions.SshPrivateKeyPath = privatekeyFilePath;
            
            if (!string.IsNullOrEmpty(_strFTPPrivateKeyPassphrase))
            {
                sessionOptions.PrivateKeyPassphrase = _strFTPPrivateKeyPassphrase; 
            }
            
            if (!string.IsNullOrEmpty(_strFTPSshHostKeyFingerprint))
            {
                sessionOptions.SshHostKeyFingerprint = _strFTPSshHostKeyFingerprint; 
            }
            
        }
    } 
}


Session session = new Session();
session.Open(sessionOptions);

Please guide me what I am doing wrong

score 2 · Accepted Answer · answered May 26 '23 at 19:38

Per the WinSCP Docs, Specifying the Dst Port the SFTP Client tries to connect to is done through setting the sessionOptions Port Number property. It's necessary only if the server listens on a non-default port (22), which in your case, it is. (2222).

So to solve your timeout issue, set the Dst Port with SessionOptions.PortNumber=2222 (or better yet, save it in a conf file or wherever those other variables (Hostname, username,password) are being set)

SFTP using WinSCP .NET timeouts in C# when connecting to port 2222

1 Answers1