TFTPD(1M)                       Domain/OS SysV                       TFTPD(1M)



NAME
     tftpd - tftp daemon

SYNOPSIS
     /etc/tftpd [ directory ... ]

DESCRIPTION
     Domain/OS tftpd is a Trivial File Transfer Protocol (TFTP) server that is
     called by inetd(1M) when another host requests the tftp(1C) service.  It
     then handles tftp file transfers in accordance with RFC783.

     The Domain/OS tftpd server is configured to run by uncommenting the line
     for the tftp service in the /etc/inetd.conf file.  The line for the tftp
     service must specify a userid for tftp requests.  The read and write
     privileges of this userid determine the access rights for tftp requests
     from other hosts.  In the interest of security, this userid should not be
     root, but rather a userid with restricted rights.  The tftpd command on
     the line for the tftp service in /etc/inet.conf can optionally specify up
     to four directories for file transfer.  Files can then be read and
     written in these directories or any of their subdirectories, in addition
     to the default set of directories containing the string "/tftp".
     Directories specified by the tftpd command must have the same format as
     incoming tftp file requests.  Thus, directory names must be pathnames
     beginning with "/" but not with "//" and not containing the string
     "/../".

     The Domain/OS tftpd server places restrictions on which files may be
     accessed as remote files by incoming tftp requests.  File names must be
     pathnames beginning with "/" but not with "//" and not containing the
     string "/../".  In addition, file names must either contain the string
     "/tftp" or begin with one of the directory names specified by the tftpd
     command when that server was invoked.  Furthermore, remote files may be
     read only if the configured tftpd userid has read access to them, and
     remote files may be written only if they do not already exist and if the
     configured tftpd userid has write access to them.

NOTE
     The Domain/OS versions of tftp and tftpd are adaptations of the MIT
     Project Athena implementation of the TFTP protocol, as described in
     RFC783.  Domain/OS tftp will interface with any RFC783-compliant
     implementation.  Note, however, that the 4.3BSD distribution version of
     tftp does not meet these restrictions.

WARNING
     tftp allows users to copy files across an internet without login or
     authentication on any remote host running a tftpd server.  If the tftpd
     server on a host is configured and run to allow tftp transactions, the
     file access restrictions imposed by that tftpd server provide the only
     security for files on that host.  Therefore, the desired security of a
     host should be considered before configuring and running the tftpd server
     to allow tftp transactions.

SEE ALSO
     tftp(1C), inetd(1M);
     Configuring and Managing TCP/IP;
     Using TCP/IP Network Applications.