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diff --git a/sftp-server.0 b/sftp-server.0 new file mode 100644 index 0000000..22c307f --- /dev/null +++ b/sftp-server.0 @@ -0,0 +1,98 @@ +SFTP-SERVER(8) System Manager's Manual SFTP-SERVER(8) + +NAME + sftp-server M-bM-^@M-^S OpenSSH SFTP server subsystem + +SYNOPSIS + sftp-server [-ehR] [-d start_directory] [-f log_facility] [-l log_level] + [-P denied_requests] [-p allowed_requests] [-u umask] + sftp-server -Q protocol_feature + +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 '%', %d 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. + + -P denied_requests + Specifies a comma-separated list of SFTP protocol requests that + are banned by the server. sftp-server will reply to any denied + request with a failure. The -Q flag can be used to determine the + supported request types. If both denied and allowed lists are + specified, then the denied list is applied before the allowed + list. + + -p allowed_requests + Specifies a comma-separated list of SFTP protocol requests that + are permitted by the server. All request types that are not on + the allowed list will be logged and replied to with a failure + message. + + Care must be taken when using this feature to ensure that + requests made implicitly by SFTP clients are permitted. + + -Q protocol_feature + Queries protocol features supported by sftp-server. At present + the only feature that may be queried is M-bM-^@M-^\requestsM-bM-^@M-^], which may be + used to deny or allow specific requests (flags -P and -p + respectively). + + -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. + + On some systems, sftp-server must be able to access /dev/log for logging + to work, and 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-02.txt, October 2001, work in progress material. + +HISTORY + sftp-server first appeared in OpenBSD 2.8. + +AUTHORS + Markus Friedl <markus@openbsd.org> + +OpenBSD 7.3 July 27, 2021 OpenBSD 7.3 |