Site-to-Site Transfers (FXP)
Separate CONTROL and DATA connections allows transmitting data not only between client and server, but also between two FTP servers at once and transfer data between them by issuing a PASV command on one server and then a matching PORT command on the other. Thus, one server connects to the other instead of to a client. This behavior is not a hack; it is part of the official FTP specs. Today, it is widely known as FXP. Because Site-to-Site transfers are considered a security risk, many servers do not support them. If you are transferring between Sites with SSH2 or SSL connections, transfers between them are not secure unless both servers support SSCN.
To perform a Site-to-Site transfer
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Connect to each Site (source and destination).
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On the main menu, click Window > Tile.
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Drag the file from one Remote Pane to another. The Queue Window displays a double arrow (<->), to indicate a Site-to-Site transfer.
To display more than one remote Site at a time
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Connect to two or more Sites.
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On the main menu, click Window > Cascade or Tile.
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To return to the default, tabbed view, click Maximize in the upper right of any remote pane.