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

NAME

sftp-serverSFTP server subsystem

SYNOPSIS

sftp-server [-f log_facility] [-l log_level] [-u umask] [-m force_file_perms]

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:

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.
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.
umask
Sets an explicit umask(2) to be applied to newly-created files and directories, instead of the user's default mask.
force_file_perms
Sets explicit file permissions to be applied to newly-created files instead of the default or client requested mode. Numeric values include: 777, 755, 750, 666, 644, 640, etc. Option -u is ineffective if -m is set.

For logging to work, sftp-server must be able to access /dev/log. Use of sftp-server in a chroot configuration 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⟩

March 26, 2009 Linux 5.14.0-427.18.1.el9_4.x86_64