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We are using FileZilla as an FTP server in Windows machines (Win 7, Win 2008), and I notice that it is missing some FTP commands. In particular I miss the "TYPE I" command, because some of the our applications use Apache Commons NET FTPClient, which uses TYPE I and not BINARY.

Any idea why is that?

220 FileZilla Server version 0.9.39 beta written by Tim Kosse ( Please visit http://sourceforge.
User ( 
331 Password required for 
230 Logged on
ftp> ?
Commands may be abbreviated.  Commands are:

!               delete          literal         prompt          send
?               debug           ls              put             status
append          dir             mdelete         pwd             trace
ascii           disconnect      mdir            quit            type
bell            get             mget            quote           user
binary          glob            mkdir           recv            verbose
bye             hash            mls             remotehelp
cd              help            mput            rename
close           lcd             open            rmdir
ftp> type I
I: unknown mode.
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closed as off topic by DerfK, John Gardeniers, mdpc, Scott Pack, MadHatter Nov 13 '12 at 19:56

Questions on Server Fault are expected to relate to server, networking, or related infrastructure administration within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

As this relates to a design decision wouldn't you be betterasking this on the filezilla form ? – Iain Aug 1 '12 at 12:01
@Iain. you're probably right. I just don't like forums very much :-) – Daphna Aug 1 '12 at 14:33

The question is confusing. You mention Apache Commons NET FTPClient but the example posted looks like a good old-fashioned BSD /usr/bin/ftp. The help lists "binary" as an available command.

It also has a "type" command, but you used it incorrectly. The "type I" that was entered at the ftp client prompt is not sent directly to the server (use quote TYPE I for that). The BSD ftp client's "type" command accepts arguments "ascii", "binary", "image", "ebcdic", "tenex". If you say type binary or type image it will send TYPE I to the server, exactly the same thing it would do if you said binary. (Try doing a debug first if you're not convinced.) When you say type I it doesn't know what you're talking about.

The example you've given doesn't prove anything about the server because it never sent a TYPE command to the server.

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