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

NAME

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

SYNOPSIS

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

DESCRIPTION

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 service.


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.

OPTIONS

-d
Debug. When specified it sets the SO_DEBUG socket
option.


-s
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.

USAGE

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

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

SEE ALSO

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.

NOTES

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:

svc:/network/tftp/udp6:default


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)