tftpd(8) - NetBSD Manual Pages

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TFTPD(8)                NetBSD System Manager's Manual                TFTPD(8)


NAME

     tftpd - DARPA Internet Trivial File Transfer Protocol server


SYNOPSIS

     tftpd [-s directory] [-l] [-n] [directory ...]


DESCRIPTION

     tftpd is a server which supports the DARPA Trivial File Transfer Proto-
     col.  The TFTP server operates at the port indicated in the `tftp' ser-
     vice description; see services(5).  The server is normally started by
     inetd(8).

     The use of tftp(1) does not require an account or password on the remote
     system.  Due to the lack of authentication information, tftpd will allow
     only publicly readable files to be accessed.  Files containing the string
     ``/../'' are not allowed.  Files may be written only if they already ex-
     ist and are publicly writable.  Note that this extends the concept of
     ``public'' to include all users on all hosts that can be reached through
     the network; this may not be appropriate on all systems, and its implica-
     tions should be considered before enabling tftp service.  The server
     should have the user ID with the lowest possible privilege.

     Access to files may be restricted by invoking tftpd with a list of direc-
     tories by including up to 20 pathnames as server program arguments in
     /etc/inetd.conf. In this case access is restricted to files whose names
     are prefixed by the one of the given directories.  The given directories
     are also treated as a search path for relative filename requests.

     The options are:

     -l      Logs all requests using syslog(3).

     -n      Suppresses negative acknowledgement of requests for nonexistent
             relative filenames.

     -s      tftpd will chroot(2) on startup; therefore the remote host is not
             expected to pass the directory as part of the file name to trans-
             fer.  This option is intended primarily for compatibility with
             SunOS boot ROMs which do not include a directory name.


SEE ALSO

     tftp(1),  inetd(8)


HISTORY

     The tftpd command appeared in 4.2BSD.

     The -s flag appeared in NetBSD 0.9a.

4.2 Berkeley Distribution        June 4, 1993                                1