tftpd(1M)                                               tftpd(1M)



NAME
     tftpd, in.tftpd - responds to  requests  to  use  the  DARPA
     Trivial File Transfer Protocol

SYNOPSIS
     in.tftpd [-d] [-s] [home-directory]

ARGUMENTS
     -d   Enables debugging.

     home-directory
          Specifies a home directory to use rather than the
          default home directory, /tftpboot.

     -s   Specifies secure mode. When this option is used, the
          directory change must succeed. In addition, tftpd
          changes its root directory to /tftpboot or the
          directory specified by home-directory, if provided.

DESCRIPTION
     tftpd is a server that supports the DARPA Trivial File
     Transfer Protocol.  The server operates at the port
     indicated in the tftp service description; see services(4N).

     By default, tftpd is disabled in the /etc/servers file. This
     is because users of tftp do not have to have an account or
     password on the remote system.  To compensate for this lack
     of security, users of tftp are only allowed to access
     publicly readable files.  Files may be written only if they
     already exist and are publicly writable.  The definition of
     ``public'' includes all users on all hosts who can be
     reached through the network. This definition may not be
     appropriate on all systems, and you should consider the
     implications before enabling tftpd.

     The tftpd daemon runs with the user ID and group ID set to
     -2 (that is, nobody), which is consistent with the
     assumption that there are no files with that owner or group.
     However, this assumption is neither checked nor enforced.

LIMITATIONS
     This server is only self-consistent.  Due to the
     unreliability of the transport protocol (UDP) and the
     scarcity of TFTP implementations, it is uncertain whether it
     really works.

     The tftpd daemon does not check the search permissions of
     the directories leading to the accessed files.

FILES
     /usr/etc/in.tftpd
          Executable file



January 1992                                                    1

tftpd(1M)                                               tftpd(1M)



     /tftpboot
          Default home directory

SEE ALSO
     tftp(1C) in A/UX Command Reference

     socket(2N), services(4N) in A/UX Programmer's Reference

     RFC 783, Network Information Center, Government Systems,
     Inc., Chantilly, VA













































2                                                    January 1992