<http://twistedmatrix.com/pipermail/twisted-python/2008-December/018932.html> Hi Jean-Paul, thank you for your reply. I need to implement a new IFTPShell, right? I have tried to create a new class (with a list method), which is inherited from IFTPShell class itself, but I cannot get it accepted by the realm I posted before. Greg

IFTPShell is the way you control the behavior of the FTP server. To exclude certain results from a directory listing, you would implement the `list´ method so that it has the necessary logic for performing that exclusion.