Internet File Transfer Protocol server is the Internet File Transfer Protocol server process. The server uses the protocol and listens at the port specified in the service specification; see Available options: Debugging information is written to the syslog using LOG_FTP. Each successful and failed session is logged using syslog with a facility of LOG_FTP. If this option is specified twice, the retrieve (get), store (put), append, delete, make directory, remove directory and rename operations and their filename arguments are also logged. Only anonymous login is allowed. ftpd enters daemon-mode. That allows ftpd to be run without inetd. Quiet mode. No information about the version of the ftpd is given to the client. A client may also request a different timeout period; the maximum period allowed may be set to seconds with the option. The default limit is 2 hours. The inactivity timeout period is set to seconds (the default is 15 minutes). Give anonymous an other (anonymous and ftpd will still work). The file can be used to disable ftp access. If the file exists, displays it and exits. If the file exists, prints it before issuing the message. If the file exists, prints it after a successful login. The ftp server currently supports the following ftp requests. The case of the requests is ignored. The following non-standard or specific commands are supported by the SITE request. The remaining ftp requests specified in Internet RFC 959 are recognized, but not implemented. MDTM and SIZE are not specified in RFC 959, but will appear in the next updated FTP RFC. The ftp server will abort an active file transfer only when the ABOR command is preceded by a Telnet "Interrupt Process" (IP) signal and a Telnet "Synch" signal in the command Telnet stream, as described in Internet RFC 959. If a STAT command is received during a data transfer, preceded by a Telnet IP and Synch, transfer status will be returned. interprets file names according to the conventions used by This allows users to utilize the metacharacters authenticates users according to three rules. The login name must be in the password data base, and not have a null password. In this case a password must be provided by the client before any file operations may be performed. The login name must not appear in the file The user must have a standard shell returned by If the user name is or an anonymous ftp account must be present in the password file (user In this case the user is allowed to log in by specifying any password (by convention an email address for the user should be used as the password). In the last case, takes special measures to restrict the client's access privileges. The server performs a to the home directory of the user. In order that system security is not breached, it is recommended that the subtree be constructed with care, following these rules: Make the home directory owned by and unwritable by anyone. Make this directory owned by and unwritable by anyone (mode 555). The program must be present to support the list command. This program should be mode 111. Make this directory owned by and unwritable by anyone (mode 555). The files and must be present for the command to be able to produce owner names rather than numbers. The password field in is not used, and should not contain real passwords. The file if present, will be printed after a successful login. These files should be mode 444. Make this directory mode 777 and owned by Guests can then place files which are to be accessible via the anonymous account in this directory. List of unwelcome/restricted users. Welcome notice. Welcome notice after login. Displayed and access refused. The server must run as the super-user to create sockets with privileged port numbers. It maintains an effective user id of the logged in user, reverting to the super-user only when binding addresses to sockets. The possible security holes have been extensively scrutinized, but are possibly incomplete. The command appeared in

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  Copyright 2003   by The Free Software Foundation     Updated Jun 2003