vsftpd.conf.5

文件传输协议linux 下vsftpd2.1.0.tar.gz

particular location in the path.

Default: NO
.TP
.B pasv_addr_resolve
Set to YES if you want to use a hostname (as opposed to IP address) in the
.BR pasv_address
option.

Default: NO
.TP
.B pasv_enable
Set to NO if you want to disallow the PASV method of obtaining a data
connection.

Default: YES
.TP
.B pasv_promiscuous
Set to YES if you want to disable the PASV security check that ensures the
data connection originates from the same IP address as the control connection.
Only enable if you know what you are doing! The only legitimate use for this
is in some form of secure tunnelling scheme, or perhaps to facilitate FXP
support.

Default: NO
.TP
.B port_enable
Set to NO if you want to disallow the PORT method of obtaining a data
connection.

Default: YES
.TP
.B port_promiscuous
Set to YES if you want to disable the PORT security check that ensures that
outgoing data connections can only connect to the client. Only enable if
you know what you are doing!

Default: NO
.TP
.B require_cert
If set to yes, all SSL client connections are required to present a client
certificate. The degree of validation applied to this certificate is
controlled by
.BR validate_cert
(Added in v2.0.6).

Default: NO
.TP
.B require_ssl_reuse
If set to yes, all SSL data connections are required to exhibit SSL session
reuse (which proves that they know the same master secret as the control
channel). (Added in v2.1.0).

Default: YES
.TP
.B run_as_launching_user
Set to YES if you want vsftpd to run as the user which launched vsftpd. This is
useful where root access is not available. MASSIVE WARNING! Do NOT enable this
option unless you totally know what you are doing, as naive use of this option
can create massive security problems. Specifically, vsftpd does not / cannot
use chroot technology to restrict file access when this option is set (even if
launched by root). A poor substitute could be to use a
.BR deny_file
setting such as {/*,*..*}, but the reliability of this cannot compare to
chroot, and should not be relied on.
If using this option, many restrictions on other options
apply. For example, options requiring privilege such as non-anonymous logins,
upload ownership changing, connecting from port 20 and listen ports less than
1024 are not expected to work. Other options may be impacted.

Default: NO
.TP
.B secure_email_list_enable
Set to YES if you want only a specified list of e-mail passwords for anonymous
logins to be accepted. This is useful as a low-hassle way of restricting
access to low-security content without needing virtual users. When enabled,
anonymous logins are prevented unless the password provided is listed in the
file specified by the
.BR email_password_file
setting. The file format is one password per line, no extra whitespace. The
default filename is /etc/vsftpd.email_passwords.

Default: NO
.TP
.B session_support
This controls whether vsftpd attempts to maintain sessions for logins. If
vsftpd is maintaining sessions, it will try and update utmp and wtmp. It
will also open a pam_session if using PAM to authenticate, and only close
this upon logout. You may wish to disable this if you do not need session
logging, and you wish to give vsftpd more opportunity to run with less
processes and / or less privilege. NOTE - utmp and wtmp support is only
provided with PAM enabled builds.

Default: NO
.TP
.B setproctitle_enable
If enabled, vsftpd will try and show session status information in the system
process listing. In other words, the reported name of the process will change
to reflect what a vsftpd session is doing (idle, downloading etc). You
probably want to leave this off for security purposes.

Default: NO
.TP
.B ssl_enable
If enabled, and vsftpd was compiled against OpenSSL, vsftpd will support secure
connections via SSL. This applies to the control connection (including login)
and also data connections. You'll need a client with SSL support too. NOTE!!
Beware enabling this option. Only enable it if you need it. vsftpd can make no
guarantees about the security of the OpenSSL libraries. By enabling this
option, you are declaring that you trust the security of your installed
OpenSSL library.

Default: NO
.TP
.B ssl_request_cert
If enabled, vsftpd will request (but not necessarily require; see
.BR require_cert) a certificate on incoming SSL connections. Normally this
should not cause any trouble at all, but IBM zOS seems to have issues.
(New in v2.0.7).

Default: YES
.TP
.B ssl_sslv2
Only applies if
.BR ssl_enable
is activated. If enabled, this option will permit SSL v2 protocol connections.
TLS v1 connections are preferred.

Default: NO
.TP
.B ssl_sslv3
Only applies if
.BR ssl_enable
is activated. If enabled, this option will permit SSL v3 protocol connections.
TLS v1 connections are preferred.

Default: NO
.TP
.B ssl_tlsv1
Only applies if
.BR ssl_enable
is activated. If enabled, this option will permit TLS v1 protocol connections.
TLS v1 connections are preferred.

Default: YES
.TP
.B strict_ssl_read_eof
If enabled, SSL data uploads are required to terminate via SSL, not an
EOF on the socket. This option is required to be sure that an attacker did
not terminate an upload prematurely with a faked TCP FIN. Unfortunately, it
is not enabled by default because so few clients get it right. (New in v2.0.7).

Default: NO
.TP
.B strict_ssl_write_shutdown
If enabled, SSL data downloads are required to terminate via SSL, not an
EOF on the socket. This is off by default as I was unable to find a single
FTP client that does this. It is minor. All it affects is our ability to tell
whether the client confirmed full receipt of the file. Even without this option,
the client is able to check the integrity of the download. (New in v2.0.7).

Default: NO
.TP
.B syslog_enable
If enabled, then any log output which would have gone to /var/log/vsftpd.log
goes to the system log instead. Logging is done under the FTPD facility.

Default: NO
.TP
.B tcp_wrappers
If enabled, and vsftpd was compiled with tcp_wrappers support, incoming
connections will be fed through tcp_wrappers access control. Furthermore,
there is a mechanism for per-IP based configuration. If tcp_wrappers sets
the VSFTPD_LOAD_CONF environment variable, then the vsftpd session will try
and load the vsftpd configuration file specified in this variable. 

Default: NO
.TP
.B text_userdb_names
By default, numeric IDs are shown in the user and group fields of directory
listings. You can get textual names by enabling this parameter. It is off
by default for performance reasons.

Default: NO
.TP
.B tilde_user_enable
If enabled, vsftpd will try and resolve pathnames such as ~chris/pics, i.e. a
tilde followed by a username. Note that vsftpd will always resolve the
pathnames ~ and ~/something (in this case the ~ resolves to the initial
login directory). Note that ~user paths will only resolve if the file
.BR /etc/passwd
may be found within the _current_ chroot() jail.

Default: NO
.TP
.B use_localtime
If enabled, vsftpd will display directory listings with the time in your
local time zone. The default is to display GMT. The times returned by the
MDTM FTP command are also affected by this option.

Default: NO
.TP
.B use_sendfile
An internal setting used for testing the relative benefit of using the
sendfile() system call on your platform.

Default: YES
.TP
.B userlist_deny
This option is examined if
.B userlist_enable
is activated. If you set this setting to NO, then users will be denied login
unless they are explicitly listed in the file specified by
.BR userlist_file .
When login is denied, the denial is issued before the user is asked for a
password.

Default: YES
.TP
.B userlist_enable
If enabled, vsftpd will load a list of usernames, from the filename given by
.BR userlist_file .
If a user tries to log in using a name in this file, they will be denied
before they are asked for a password. This may be useful in preventing
cleartext passwords being transmitted. See also
.BR userlist_deny .

Default: NO
.TP
.B validate_cert
If set to yes, all SSL client certificates received must validate OK.
Self-signed certs do not constitute OK validation. (New in v2.0.6).

Default: NO
.TP
.B virtual_use_local_privs
If enabled, virtual users will use the same privileges as local users. By
default, virtual users will use the same privileges as anonymous users, which
tends to be more restrictive (especially in terms of write access).

Default: NO
.TP
.B write_enable
This controls whether any FTP commands which change the filesystem are allowed
or not. These commands are: STOR, DELE, RNFR, RNTO, MKD, RMD, APPE and SITE.

Default: NO
.TP
.B xferlog_enable
If enabled, a log file will be maintained detailling uploads and downloads.
By default, this file will be placed at /var/log/vsftpd.log, but this location
may be overridden using the configuration setting
.BR vsftpd_log_file .

Default: NO (but the sample config file enables it)
.TP
.B xferlog_std_format
If enabled, the transfer log file will be written in standard xferlog format,
as used by wu-ftpd. This is useful because you can reuse existing transfer
statistics generators. The default format is more readable, however. The
default location for this style of log file is /var/log/xferlog, but you may
change it with the setting
.BR xferlog_file .

Default: NO

.SH NUMERIC OPTIONS
Below is a list of numeric options. A numeric option must be set to a non
negative integer. Octal numbers are supported, for convenience of the umask
options. To specify an octal number, use 0 as the first digit of the number.

.TP
.B accept_timeout
The timeout, in seconds, for a remote client to establish connection with
a PASV style data connection.

Default: 60
.TP
.B anon_max_rate
The maximum data transfer rate permitted, in bytes per second, for anonymous
clients.

Default: 0 (unlimited)
.TP
.B anon_umask
The value that the umask for file creation is set to for anonymous users. NOTE! If you want to specify octal values, remember the "0" prefix otherwise the
value will be treated as a base 10 integer!

Default: 077
.TP
.B chown_upload_mode
The file mode to force for chown()ed anonymous uploads. (Added in v2.0.6).

Default: 0600
.TP
.B connect_timeout
The timeout, in seconds, for a remote client to respond to our PORT style
data connection.

Default: 60
.TP
.B data_connection_timeout
The timeout, in seconds, which is roughly the maximum time we permit data
transfers to stall for with no progress. If the timeout triggers, the remote
client is kicked off.

Default: 300
.TP
.B delay_failed_login
The number of seconds to pause prior to reporting a failed login.

Default: 1
.TP
.B delay_successful_login
The number of seconds to pause prior to allowing a successful login.

Default: 0
.TP
.B file_open_mode
The permissions with which uploaded files are created. Umasks are applied
on top of this value. You may wish to change to 0777 if you want uploaded
files to be executable.

Default: 0666
.TP
.B ftp_data_port
The port from which PORT style connections originate (as long as the poorly
named
.BR connect_from_port_20
is enabled).

Default: 20
.TP
.B idle_session_timeout
The timeout, in seconds, which is the maximum time a remote client may spend
between FTP commands. If the timeout triggers, the remote client is kicked
off.

Default: 300
.TP
.B listen_port
If vsftpd is in standalone mode, this is the port it will listen on for
incoming FTP connections.

Default: 21
.TP
.B local_max_rate
The maximum data transfer rate permitted, in bytes per second, for local
authenticated users.

Default: 0 (unlimited)
.TP