NAME    [Toc]    [Back]

     tftpd - DARPA Trivial File Transfer Protocol server

SYNOPSIS    [Toc]    [Back]

     tftpd [directory ...]
     tftpd [-cs] [directory]

DESCRIPTION    [Toc]    [Back]

     tftpd is a server which  supports  the  DARPA  Trivial  File
Transfer Protocol.
   The TFTP server operates at the port indicated in the
`tftp' service
 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 may be
written only
     if they already exist and are publicly writable, unless  the
-c flag is
     specified  (see  below).  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,
     unless  the  -s flag is specified (see below), in which case
it must be
     started with user ID 0.

     Access to files may be restricted by invoking tftpd  with  a
list of directories
 by including pathnames as server program arguments in
     /etc/inetd.conf.  In this case access is restricted to files
whose names
     are prefixed by one of the given directories.

     The options are as follows:

     -c       If  the -c flag is used, tftpd will allow new files
to be created;
             otherwise uploaded files must already exist.   Files
are created
             with  default permissions allowing anyone to read or
write to
             them.

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

SEE ALSO    [Toc]    [Back]

     tftp(1), inetd(8), pxeboot(8)

HISTORY    [Toc]    [Back]

     The tftpd command appeared in 4.2BSD.

     The -s flag appeared in NetBSD 0.9a.

     The -c flag was added in OpenBSD 2.1.

BUGS    [Toc]    [Back]

     This implementation of tftpd does not support blocksize  negotiation (RFC
     1783),  so  files larger than 33488896 octets (65535 blocks)
cannot be
     transferred.

     Many TFTP clients will  not  transfer  files  over  16744448
octets (32767
     blocks).

OpenBSD      3.6                           June      11,     1997