1SFTP-SERVER(8)            BSD System Manager's Manual           SFTP-SERVER(8)
2

NAME

4     sftp-server — SFTP server subsystem
5

SYNOPSIS

7     sftp-server [-ehR] [-f log_facility] [-l log_level] [-u umask]
8

DESCRIPTION

10     sftp-server is a program that speaks the server side of SFTP protocol to
11     stdout and expects client requests from stdin.  sftp-server is not
12     intended to be called directly, but from sshd(8) using the Subsystem
13     option.
14
15     Command-line flags to sftp-server should be specified in the Subsystem
16     declaration.  See sshd_config(5) for more information.
17
18     Valid options are:
19
20     -e      Causes sftp-server to print logging information to stderr instead
21             of syslog for debugging.
22
23     -f log_facility
24             Specifies the facility code that is used when logging messages
25             from sftp-server.  The possible values are: DAEMON, USER, AUTH,
26             LOCAL0, LOCAL1, LOCAL2, LOCAL3, LOCAL4, LOCAL5, LOCAL6, LOCAL7.
27             The default is AUTH.
28
29     -h      Displays sftp-server usage information.
30
31     -l log_level
32             Specifies which messages will be logged by sftp-server.  The pos‐
33             sible values are: QUIET, FATAL, ERROR, INFO, VERBOSE, DEBUG,
34             DEBUG1, DEBUG2, and DEBUG3.  INFO and VERBOSE log transactions
35             that sftp-server performs on behalf of the client.  DEBUG and
36             DEBUG1 are equivalent.  DEBUG2 and DEBUG3 each specify higher
37             levels of debugging output.  The default is ERROR.
38
39     -R      Places this instance of sftp-server into a read-only mode.
40             Attempts to open files for writing, as well as other operations
41             that change the state of the filesystem, will be denied.
42
43     -u umask
44             Sets an explicit umask(2) to be applied to newly-created files
45             and directories, instead of the user's default mask.
46
47     For logging to work, sftp-server must be able to access /dev/log.  Use of
48     sftp-server in a chroot configuration therefore requires that syslogd(8)
49     establish a logging socket inside the chroot directory.
50

SEE ALSO

52     sftp(1), ssh(1), sshd_config(5), sshd(8)
53
54     T. Ylonen and S. Lehtinen, SSH File Transfer Protocol, draft-ietf-secsh-
55     filexfer-00.txt, January 2001, work in progress material.
56

HISTORY

58     sftp-server first appeared in OpenBSD 2.8.
59

AUTHORS

61     Markus Friedl <markus@openbsd.org>
62
63BSD                              June 22, 2019                             BSD
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