ftpd(8c)																  ftpd(8c)

Name
       ftpd - DARPA Internet File Transfer Protocol server

Syntax
       /usr/etc/ftpd [ -d ] [ -l ] [ -ttimeout ]

Description
       The  server  is	the  DARPA  Internet  File  Transfer  Protocol server process.	The server uses the TCP protocol and is invoked by when it
       receives a connection on the port specified in the service specification.  For further information, see

       The server currently supports the following requests.  Case is not distinguished.

       Request	Description

       ABOR	 Abort previous command

       ACCT	 Specify account

       ALLO	 Allocate storage

       APPE	 Append to a file

       CDUP	 Change to parent of current working directory

       CWD	 Change working directory

       DELE	 Delete a file

       HELP	 Give help information

       LIST	 Give list of files in a directory (ls -lg)

       MKD	 Make a directory

       MODE	 Specify data transfer mode

       NLST	 Give name list of files in directory (ls)

       NOOP	 Do nothing

       PASS	 Specify password

       PASV	 Prepare for server-to-server transfer

       PORT	 Specify data connection port

       PWD	 Print the current working directory

       QUIT	 Terminate session

       RETR	 Retrieve a file

       RMD	 Remove a directory

       RNFR	 Specify rename-from file name

       RNTO	 Specify rename-to file name

       STOR	 Store a file

       STOU	 Store a file with a unique name

       STRU	 Specify data transfer structure

       TYPE	 Specify data transfer type

       USER	 Specify user name

       XCUP	 Change to parent of current working directory

       XCWD	 Change working directory

       XMKD	 Make a directory

       XPWD	 Print the current working directory

       XRMD	 Remove a directory

       The remaining requests specified in Internet RFC 959 are recognized, but not implemented.

       The server interprets file names according to the globbing conventions used by This allows users to utilize the metacharacters *?[]{}~.

       The server authenticates users according to three rules:

       1.   The user name must be in the password database, and not have a null password.  In this case a password must be provided by the  client
	    before any file operations may be performed.

       2.   The user name must not appear in the file

       3.   If	the  user  name  is  anonymous	or an anonymous account must be present in the password file (user ftp).  In this case the user is
	    allowed to log in by specifying any password (by convention this is given as the client host's name).

       In the last case, takes special measures to restrict the client's access privileges.  The server performs a command to the  home  directory
       of the user. To prevent system security from being breached, it is recommended that the subtree be constructed with care.  Thus the follow-
       ing rules are recommended:

       ~ftp)	 Make the home directory owned by and unwritable by anyone.

       ~ftp/bin) Make this directory owned by the superuser and unwritable by anyone.  The program must be present to support the  list  commands.
		 This program should have mode 111.

       ~ftp/etc) Make this directory owned by the superuser and unwritable by anyone.  The files and must be present for the command to work prop-
		 erly.	These files should be mode 444.

       ~ftp/pub) Make this directory mode 777 and owned by Place the files, which are to be accessible by the anonymous account,  in  this  direc-
		 tory.

Options
       -d   Enables certain debugging messages that are printed by ftpd.

       -l   Logs each ftp session to the

       -t   Sends the inactivity timeout period to timeout; otherwise, the server will timeout an inactive session after 15 minutes.

Restrictions
       Support does not exist for aborting commands.

       The use of an anonymous account is inherently dangerous and should be avoided when possible.

       The  server  must  run  as  the superuser to create sockets with privileged port numbers.  The server maintains an effective user id of the
       logged in user, reverting to the superuser only when binding addresses to sockets.  The possible security holes have been extensively scru-
       tinized, but are possibly incomplete.

Files
       Contains the list of unauthorized users

See Also
       ftp(1c), services(5), inetd(8c), syslog(8)

																	  ftpd(8c)