TFTPD(8) OpenBSD System Manager's Manual TFTPD(8)
tftpd - DARPA Trivial File Transfer Protocol server
tftpd [-cl] [directory ...]
tftpd [-cl] -s directory
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
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 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.
-l Log the client IP, type of request, and filename using syslog(3)
with a level of LOG_INFO.
chroot(2) to directory on startup; 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.
tftp(1), inetd(8), pxeboot(8), syslogd(8), tftp-proxy(8)
The tftpd command appeared in 4.2BSD.
The -s flag appeared in NetBSD 0.9a.
The -c flag was added in OpenBSD 2.1.
The -l flag was added in OpenBSD 4.3.
Many TFTP clients will not transfer files over 16744448 octets (32767
OpenBSD 5.1 November 14, 2008 OpenBSD 5.1
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