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Diffstat (limited to 'sftp-server.0')
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diff --git a/sftp-server.0 b/sftp-server.0 new file mode 100644 index 0000000..4c42b26 --- /dev/null +++ b/sftp-server.0 @@ -0,0 +1,96 @@ +SFTP-SERVER(8) System Manager's Manual SFTP-SERVER(8) + +NAME + sftp-server M-bM-^@M-^S SFTP server subsystem + +SYNOPSIS + sftp-server [-ehR] [-d start_directory] [-f log_facility] [-l log_level] + [-P blacklisted_requests] [-p whitelisted_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 blacklisted_requests + Specify a comma-separated list of SFTP protocol requests that are + banned by the server. sftp-server will reply to any blacklisted + request with a failure. The -Q flag can be used to determine the + supported request types. If both a blacklist and a whitelist are + specified, then the blacklist is applied before the whitelist. + + -p whitelisted_requests + Specify a comma-separated list of SFTP protocol requests that are + permitted by the server. All request types that are not on the + whitelist 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 + Query 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 + for black or whitelisting (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 6.4 December 11, 2014 OpenBSD 6.4 |