SessionOptions Class

Defines information to allow an automatic connection and authentication of the session. Is used with the Session.Open and Session.ScanFingerprint methods.

You can have WinSCP generate a code template for SessionOptions for you.



Namespace: WinSCP

public sealed class SessionOptions
Public NotInheritable Class SessionOptions


Name Description
SessionOptions() Default constructor.


Name Description
FtpMode FtpMode FTP mode. Possible values are FtpMode.Passive (default) and FtpMode.Active.
FtpSecure FtpSecure FTPS mode. Possible values are FtpSecure.None (default), FtpSecure.Implicit and FtpSecure.Explicit.
bool GiveUpSecurityAndAcceptAnySshHostKey Give up security and accept any SSH host key. To be used in exceptional situations only, when security is not required. When set, log files will include warning about insecure connection. To maintain security, use SshHostKeyFingerprint.
bool GiveUpSecurityAndAcceptAnyTlsHostCertificate Give up security and accept any FTPS/WebDAVS server TLS/SSL certificate. To be used in exceptional situations only, when security is not required. When set, log files will include warning about insecure connection. To maintain security, use TlsHostCertificateFingerprint.
string HostName Name of the host to connect to. Mandatory property.
string Password Password for authentication.
int PortNumber Port number to connect to. Keep default 0 to use the default port for the protocol.
string PrivateKeyPassphrase Passphrase for encrypted private keys and client certificates.
Protocol Protocol Protocol to use for the session. Possible values are Protocol.Sftp (default), Protocol.Scp, Protocol.Ftp and Protocol.Webdav.
SecureString SecurePassword Encrypted password for authentication. Use instead of Password to reduce a number of unencrypted copies of the password in memory.
string SshHostKeyFingerprint Fingerprint of SSH server host key (or several alternative fingerprints separated by semicolon). It makes WinSCP automatically accept host key with the fingerprint. Mandatory for SFTP/SCP protocol.1) Learn how to obtain host key fingerprint.
string SshPrivateKeyPath Full path to SSH private key file.
string TlsClientCertificatePath Full path to TLS/SSL client certificate.
string TlsHostCertificateFingerprint Fingerprint of FTPS/WebDAVS server TLS/SSL certificate to be automatically accepted (useful for certificates signed by untrusted authority).
TimeSpan Timeout Server response timeout. Defaults to 15 seconds.
int TimeoutInMilliseconds Alternative to Timeout. Particularly useful for COM hosts, that cannot use TimeSpan, such as Visual Basic.
string UserName Username for authentication. Mandatory property.
bool WebdavSecure Use WebDAVS (WebDAV over TLS/SSL), instead of WebDAV.
string WebdavRoot WebDAV root path.


Name Description
AddRawSettings Allows configuring any site settings using raw format as in an INI file.
ParseUrl Parses session URL into its components.


The using the SessionOptions instance with the Session.Open, you need to fill in all properties required to connect and authenticate your session automatically.

You always need to fill in Protocol, HostName and UserName2).

In most cases you need to fill in Password. Exceptions are:

  • You use different authentication method than a password authentication, such as public key authentication for SSH session;
  • The server does not require password.

For SSH (SFTP/SCP) session you need to fill in the SshHostKeyFingerprint to verify the expected server host key.


1) You can leave the property null, if you set GiveUpSecurityAndAcceptAnySshHostKey.
2) Except for very rare occasions that the server does not require username.
  library_sessionoptions.txt · Last modified: by martin

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