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SFTP-SERVER(8)            BSD System Manager's Manual           SFTP-SERVER(8)

NAME
     sftp-server -- SFTP server subsystem

SYNOPSIS
     sftp-server [-ehR] [-d start_directory] [-f log_facility] [-l log_level] [-u umask]

DESCRIPTION
     sftp-server is a program that speaks the server side of SFTP protocol to stdout and expects client
     requests from stdin.  sftp-server is not intended to be called directly, but from sshd(8) using the
     Subsystem option.

     Command-line flags to sftp-server should be specified in the Subsystem declaration.  See sshd_config(5)
     for more information.

     Valid options are:

     -d start_directory
             specifies an alternate starting directory for users.  The pathname may contain the following
             tokens that are expanded at runtime: %% is replaced by a literal '%', %h is replaced by the
             home directory of the user being authenticated, and %u is replaced by the username of that
             user.  The default is to use the user's home directory.  This option is useful in conjunction
             with the sshd_config(5) ChrootDirectory option.

     -e      Causes sftp-server to print logging information to stderr instead of syslog for debugging.

     -f log_facility
             Specifies the facility code that is used when logging messages from sftp-server.  The possible
             values are: DAEMON, USER, AUTH, LOCAL0, LOCAL1, LOCAL2, LOCAL3, LOCAL4, LOCAL5, LOCAL6, LOCAL7.
             The default is AUTH.

     -h      Displays sftp-server usage information.

     -l log_level
             Specifies which messages will be logged by sftp-server.  The possible values are: QUIET, FATAL,
             ERROR, INFO, VERBOSE, DEBUG, DEBUG1, DEBUG2, and DEBUG3.  INFO and VERBOSE log transactions
             that sftp-server performs on behalf of the client.  DEBUG and DEBUG1 are equivalent.  DEBUG2
             and DEBUG3 each specify higher levels of debugging output.  The default is ERROR.

     -R      Places this instance of sftp-server into a read-only mode.  Attempts to open files for writing,
             as well as other operations that change the state of the filesystem, will be denied.

     -u umask
             Sets an explicit umask(2) to be applied to newly-created files and directories, instead of the
             user's default mask.

     For logging to work, sftp-server must be able to access /dev/log.  Use of sftp-server in a chroot con-figuration configuration
     figuration therefore requires that syslogd(8) establish a logging socket inside the chroot directory.

SEE ALSO
     sftp(1), ssh(1), sshd_config(5), sshd(8)

     T. Ylonen and S. Lehtinen, SSH File Transfer Protocol, draft-ietf-secsh-filexfer-00.txt, January 2001,
     work in progress material.

HISTORY
     sftp-server first appeared in OpenBSD 2.8.

AUTHORS
     Markus Friedl <markus@openbsd.org>

BSD                            October 11, 2013                            BSD