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Does Apache Commons Net FTPClient use passive or active mode by default?

The app I’m working with uses FTPClient class from Apache Commons Net to connect and transfer files to a FTP server. I’m trying to establish if it’s doing that in a passive or active mode by default and I can’t see any references in the app’s code or in the library itself.

Any ideas?

Answer

The active mode is the default.

Documentation for FTPClient constructor says:

Default FTPClient constructor. Creates a new FTPClient instance with the data connection mode set to ACTIVE_LOCAL_DATA_CONNECTION_MODE , the file type set to FTP.ASCII_FILE_TYPE , the file format set to FTP.NON_PRINT_TEXT_FORMAT , the file structure set to FTP.FILE_STRUCTURE , and the transfer mode set to FTP.STREAM_TRANSFER_MODE .