Clarification on the acronyms “SFTP” and “FTPS” “SFTP” is the Secure File Transfer Protocol over SSH. It is a protocol unrelated to the FTP protocol. (It is actually a subsystem of SSH.) The Chilkat SSH / SFTP component is used for “SFTP”. SFTP is achieved by connecting to an SSH server at port 22. On the other hand, the Chilkat […]
See this Chilkat blog post for help in determining workable FTP connection settings: Determining FTP2 Connection Settings
If this FTP server response is seen in the LastErrorText, it means that the SSL/TLS connection requires a client-side certificate with private key. Prior to connecting, the client-side certificate should be specified by calling the SetSslClientCert, or SetSslClientCertPfx. Make sure to check the return value of these methods for success/failure. If the SetSslClientCert* method fails, then no client-side certificate has […]
Chilkat FTP2 provides methods for synchronizing a local directory tree with a remote directory tree — in both directions. The SyncLocalTree method downloads files from the remote tree to the local tree, and SyncRemoteTree uploads files from the local tree to the remote tree. Both have a number of different “modes” that determine which files are transferred, depending on existence, […]
This error message is specific to the ProFTPd server. A Chilkat customer found this error within the LastErrorText after trying to upload or download a file, or retrieve a directory listing: 425 Unable to build data connection: Operation not permitted The latest ProFTPd server has a configuration setting that by default requires SSL/TLS sessions to be re-used, and this breaks […]
To handle accented characters in filenames correctly, the FTP client must know what character encoding is used to represent these characters (such as utf-8, iso-8859-1, etc.). The Ftp2.DirListingCharset property indicates the character encoding to be used when interpreting the bytes of a filename (in a directory listing). By default, it is set to “ANSI”, which is another name for the […]
The Chilkat FTP2 ActiveX provides the following event callbacks: ‘ IMPORTANT: For all callbacks, arguments named “skip” or “abort” are output-only arguments. ‘ These arguments may be set to 1 within the callback to either skip a ‘ particular file upload/download, or abort the entire operation. Dim WithEvents ftp As ChilkatFtp2 ‘ Called just before a file is to be […]
Question: I’ve been trying to get the progress bar in VB6 to work, based on the code on your website, but I’m having no luck. The event isn’t even being triggered. Answer: Here are some things to try: Test progress monitoring with a large enough file such that the progress does not go from 0 to 100% instantly. Use the […]
The FTP Extended Passive Mode (EPSV) continues to be both a solution to problems AND the cause of problems. The Chilkat FTP2 component will automatically use EPSV (as opposed to PASV) if it detects the FTP server supports EPSV. This is generally a good thing to do, and often solves problems. However, occasionally it can be the cause of problems. […]
This post points to the various examples and blog posts scattered among the chilkatsoft.com, example-code.com, and cknotes.com involving progress monitoring of FTP uploads and downloads using the Chilkat FTP2 ActiveX, .NET component, and C++ libs. Important for Monitoring Upload Progress: The SendBufferSize property is set to a large value (512K) to maximize performance. Unfortunately, this usually ruins the frequency of […]