The Chilkat FTP2 component can handle just about every secure FTP situation. The problem is that so many factors can be involved that it’s difficult to determine what combination of FTP2 property settings are required to get a secure data transfer working.
The new DetermineSettings method determines what combinations of FTP2 property settings result in successful data transfers. It tries 13 different combinations of these properties: Ssl, AuthTls, AuthSsl, Port, Passive, and PassiveUseHostAddr. Within the FTP protocol, the process of fetching a directory listing is also considered a "data transfer". The DetermineSettings method works by checking to see which combinations result in a successful directory listing download. The method takes no arguments and returns a string containing an XML report of the results. It is a blocking call that may take approximately a minute to run. If you are unsure about how to interpret the results, cut-and-paste it into an email and send it to email@example.com.
C# DetermineSettings Example