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 TFTPD(8)                                                           TFTPD(8)
                               28 January 1997

      tftpd - Internet Trivial File Transfer Protocol server

      tftpd [ -dn ] [ -b bootptab ] directory ...

      Tftpd is a server which supports the Internet Trivial File Transfer
      Protocol (RFC 783).  The TFTP server operates at the port indicated in
      the `tftp' service description; see services(5).  The server is
      normally started at bootup time.  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 exist 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
      implications 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
      directories by including up to 20 pathnames as arguments.  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.  Only clients listed in
      the bootptab are allowed access.  The options are:

      -d   Raise the debugging  level.  This also keeps tftpd from forking
           and generates some extra syslog(3) messages.

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

      -b bootptab
           Specifies an alternate bootptab file. The default is


      The tftpd command appeared in 4.2BSD.  This version is based on the
      4.4BSD version which does read-ahead.  It has been modified to handle
      client requests in a single process.  For security reasons, it does
      not allow clients to write or otherwise modify data on the server.

                                    - 1 -          Formatted:  June 30, 2022