IN.TFTPD(8) Maintenance Procedures IN.TFTPD(8)


in.tftpd, tftpd - Internet Trivial File Transfer Protocol server


in.tftpd [-d] [-T rexmtval] [-s] [homedir]


tftpd is a server that supports the Internet Trivial File Transfer
Protocol (TFTP).

Before responding to a request, the server attempts to change its current
directory to homedir; the default directory is /tftpboot.

The use of tftp does not require an account or password on the remote
system. Due to the lack of authentication information, in.tftpd will
allow only publicly readable files to be accessed. 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 this

in.tftpd runs with the user ID and group ID set to [GU]ID_NOBODY under
the assumption that no files exist with that owner or group. However,
nothing checks this assumption or enforces this restriction.


Debug. When specified it sets the SO_DEBUG socket option.

Secure. When specified, the directory change to homedir
must succeed. The daemon also changes its root directory
to homedir.

-T rexmtval
Specifies the value of the retransmission timeout in
seconds. This also affects the maximum session timeout in
that the latter is set to five times the retransmission
timeout value.


The in.tftpd server is IPv6-enabled. See ip6(4P).

in.tftpd supports transfers of greater than 32 MB, per RFC 2348.


svcs(1), tftp(1), ip6(4P), netconfig(5), attributes(7), smf(7),
inetadm(8), inetd(8), svcadm(8)

Malkin, G. and Harkin, A. RFC 2347, TFTP Option Extension. The Internet
Society. May 1998

Malkin, G. and Harkin, A. RFC 2348, TFTP Blocksize Option. The Internet
Society. May 1998

Malkin, G. and Harkin, A. RFC 2349, TFTP Timeout Interval and Transfer
Size Options. The Internet Society. May 1998

Sollins, K.R. RFC 1350, The TFTP Protocol (Revision 2). Network Working
Group. July 1992.


The tftpd server only acknowledges the transfer size option that is sent
with a read request when the octet transfer mode is specified.

The in.tftpd.1m service is managed by the service management facility,
smf(7), under the service identifier:


Administrative actions on this service, such as enabling, disabling, or
requesting restart, can be performed using svcadm(8). Responsibility for
initiating and restarting this service is delegated to inetd(8). Use
inetadm(8) to make configuration changes and to view configuration
information for this service. The service's status can be queried using
the svcs(1) command.

June 17, 2015 IN.TFTPD(8)