Copyright © 2004-2010 Jo HoSeok. All rights reserved.
root@wl ~ # wget ftp://vsftpd.beasts.org/users/cevans/vsftpd-2.2.2.tar.gz root@wl ~ # tar xvfz vsftpd-2.2.2.tar.gz root@wl ~ # cd vsftpd-2.2.2 root@wl ~/vsftpd-2.2.2 # vi builddefs.h 1) root@wl ~/vsftpd-2.2.2 # vi Makefile 2) INSTALL = /usr/ucb/install root@wl ~/vsftpd-2.2.2 # PATH=/usr/sfw/bin:$PATH /usr/sfw/bin/gmake root@wl ~/vsftpd-2.2.2 # mkdir -p /usr/local/sbin root@wl ~/vsftpd-2.2.2 # mkdir -p /usr/local/man/man8 root@wl ~/vsftpd-2.2.2 # mkdir -p /usr/local/man/man5 root@wl ~/vsftpd-2.2.2 # /usr/sfw/bin/gmake install 3) root@wl ~/vsftpd-2.2.2 # cp vsftpd.conf /etc 4)1) SSL과 TCPWRAPPERS를 사용하도록 수정할 수 있다. vsftpd는 별도의 configure 스크립트를 제공하지 않는다.
root@wl ~ # mkdir /usr/share/empty/ 1) root@wl ~ # vi /etc/vsftpd.conf 2) listen=YES anonymous_enable=NO local_enable=YES chroot_local_user=YES ftpd_banner=Windyhana's FTP Service root@wl ~ # /usr/local/sbin/vsftpd & 3)1) /usr/share/empty/ 가 없으면 로그인할 때 오류난다.
root@wl ~ # useradd -u 300 -d /var/ftp ftp 1)
root@wl ~ # vi /etc/vsftpd.conf
anonymous_enable=YES
root@wl ~ # pkill vsftpd
root@wl ~ # /usr/local/sbin/vsftpd &
1) ftp사용자와 /var/ftp 디렉토리만 만들어주기 위함이다. /var/ftp가 익명연결의 루트가 된다.
Standards, Environments, and Macros VSFTPD.CONF(5)
NAME
vsftpd.conf - config file for vsftpd
DESCRIPTION
vsftpd.conf may be used to control various aspects of
vsftpd's behaviour. By default, vsftpd looks for this file
at the location /etc/vsftpd.conf. However, you may override
this by specifying a command line argument to vsftpd. The
command line argument is the pathname of the configuration
file for vsftpd. This behaviour is useful because you may
wish to use an advanced inetd such as xinetd to launch
vsftpd with different configuration files on a per virtual
host basis.
FORMAT
The format of vsftpd.conf is very simple. Each line is
either a comment or a directive. Comment lines start with a
# and are ignored. A directive line has the format:
option=value
It is important to note that it is an error to put any space
between the option, = and value.
Each setting has a compiled in default which may be modified
in the configuration file.
BOOLEAN OPTIONS
Below is a list of boolean options. The value for a boolean
option may be set to YES or NO.
allow_anon_ssl
Only applies if ssl_enable is active. If set to YES,
anonymous users will be allowed to use secured SSL con-
nections.
Default: NO
anon_mkdir_write_enable
If set to YES, anonymous users will be permitted to
create new directories under certain conditions. For
this to work, the option write_enable must be
activated, and the anonymous ftp user must have write
permission on the parent directory.
Default: NO
anon_other_write_enable
If set to YES, anonymous users will be permitted to
perform write operations other than upload and create
directory, such as deletion and renaming. This is gen-
erally not recommended but included for completeness.
Default: NO
anon_upload_enable
If set to YES, anonymous users will be permitted to
upload files under certain conditions. For this to
work, the option write_enable must be activated, and
the anonymous ftp user must have write permission on
desired upload locations. This setting is also required
for virtual users to upload; by default, virtual users
are treated with anonymous (i.e. maximally restricted)
privilege.
Default: NO
anon_world_readable_only
When enabled, anonymous users will only be allowed to
download files which are world readable. This is
recognising that the ftp user may own files, especially
in the presence of uploads.
Default: YES
anonymous_enable
Controls whether anonymous logins are permitted or not.
If enabled, both the usernames ftp and anonymous are
recognised as anonymous logins.
Default: YES
ascii_download_enable
When enabled, ASCII mode data transfers will be
honoured on downloads.
Default: NO
ascii_upload_enable
When enabled, ASCII mode data transfers will be
honoured on uploads.
Default: NO
async_abor_enable
When enabled, a special FTP command known as "async
ABOR" will be enabled. Only ill advised FTP clients
will use this feature. Additionally, this feature is
awkward to handle, so it is disabled by default. Unfor-
tunately, some FTP clients will hang when cancelling a
transfer unless this feature is available, so you may
wish to enable it.
Default: NO
background
When enabled, and vsftpd is started in "listen" mode,
vsftpd will background the listener process. i.e. con-
trol will immediately be returned to the shell which
launched vsftpd.
Default: NO
check_shell
Note! This option only has an effect for non-PAM builds
of vsftpd. If disabled, vsftpd will not check
/etc/shells for a valid user shell for local logins.
Default: YES
chmod_enable
When enabled, allows use of the SITE CHMOD command.
NOTE! This only applies to local users. Anonymous users
never get to use SITE CHMOD.
Default: YES
chown_uploads
If enabled, all anonymously uploaded files will have
the ownership changed to the user specified in the set-
ting chown_username. This is useful from an adminis-
trative, and perhaps security, standpoint.
Default: NO
chroot_list_enable
If activated, you may provide a list of local users who
are placed in a chroot() jail in their home directory
upon login. The meaning is slightly different if
chroot_local_user is set to YES. In this case, the list
becomes a list of users which are NOT to be placed in a
chroot() jail. By default, the file containing this
list is /etc/vsftpd.chroot_list, but you may override
this with the chroot_list_file setting.
Default: NO
chroot_local_user
If set to YES, local users will be (by default) placed
in a chroot() jail in their home directory after login.
Warning: This option has security implications, espe-
cially if the users have upload permission, or shell
access. Only enable if you know what you are doing.
Note that these security implications are not vsftpd
specific. They apply to all FTP daemons which offer to
put local users in chroot() jails.
Default: NO
connect_from_port_20
This controls whether PORT style data connections use
port 20 (ftp-data) on the server machine. For security
reasons, some clients may insist that this is the case.
Conversely, disabling this option enables vsftpd to run
with slightly less privilege.
Default: NO (but the sample config file enables it)
debug_ssl
If true, OpenSSL connection diagnostics are dumped to
the vsftpd log file. (Added in v2.0.6).
Default: NO
delete_failed_uploads
If true, any failed upload files are deleted. (Added
in v2.0.7).
Default: NO
deny_email_enable
If activated, you may provide a list of anonymous pass-
word e-mail responses which cause login to be denied.
By default, the file containing this list is
/etc/vsftpd.banned_emails, but you may override this
with the banned_email_file setting.
Default: NO
dirlist_enable
If set to NO, all directory list commands will give
permission denied.
Default: YES
dirmessage_enable
If enabled, users of the FTP server can be shown mes-
sages when they first enter a new directory. By
default, a directory is scanned for the file .message,
but that may be overridden with the configuration set-
ting message_file.
Default: NO (but the sample config file enables it)
download_enable
If set to NO, all download requests will give permis-
sion denied.
Default: YES
dual_log_enable
If enabled, two log files are generated in parallel,
going by default to /var/log/xferlog and
/var/log/vsftpd.log. The former is a wu-ftpd style
transfer log, parseable by standard tools. The latter
is vsftpd's own style log.
Default: NO
force_dot_files
If activated, files and directories starting with .
will be shown in directory listings even if the "a"
flag was not used by the client. This override excludes
the "." and ".." entries.
Default: NO
force_anon_data_ssl
Only applies if ssl_enable is activated. If activated,
all anonymous logins are forced to use a secure SSL
connection in order to send and receive data on data
connections.
Default: NO
force_anon_logins_ssl
Only applies if ssl_enable is activated. If activated,
all anonymous logins are forced to use a secure SSL
connection in order to send the password.
Default: NO
force_local_data_ssl
Only applies if ssl_enable is activated. If activated,
all non-anonymous logins are forced to use a secure SSL
connection in order to send and receive data on data
connections.
Default: YES
force_local_logins_ssl
Only applies if ssl_enable is activated. If activated,
all non-anonymous logins are forced to use a secure SSL
connection in order to send the password.
Default: YES
guest_enable
If enabled, all non-anonymous logins are classed as
"guest" logins. A guest login is remapped to the user
specified in the guest_username setting.
Default: NO
hide_ids
If enabled, all user and group information in directory
listings will be displayed as "ftp".
Default: NO
implicit_ssl
If enabled, an SSL handshake is the first thing expect
on all connections (the FTPS protocol). To support
explicit SSL and/or plain text too, a separate vsftpd
listener process should be run.
Default: NO
listen
If enabled, vsftpd will run in standalone mode. This
means that vsftpd must not be run from an inetd of some
kind. Instead, the vsftpd executable is run once
directly. vsftpd itself will then take care of listen-
ing for and handling incoming connections.
Default: NO
listen_ipv6
Like the listen parameter, except vsftpd will listen on
an IPv6 socket instead of an IPv4 one. This parameter
and the listen parameter are mutually exclusive.
Default: NO
local_enable
Controls whether local logins are permitted or not. If
enabled, normal user accounts in /etc/passwd (or wher-
ever your PAM config references) may be used to log in.
This must be enable for any non-anonymous login to
work, including virtual users.
Default: NO
lock_upload_files
When enabled, all uploads proceed with a write lock on
the upload file. All downloads proceed with a shared
read lock on the download file. WARNING! Before ena-
bling this, be aware that malicious readers could
starve a writer wanting to e.g. append a file.
Default: YES
log_ftp_protocol
When enabled, all FTP requests and responses are
logged, providing the option xferlog_std_format is not
enabled. Useful for debugging.
Default: NO
ls_recurse_enable
When enabled, this setting will allow the use of "ls
-R". This is a minor security risk, because a ls -R at
the top level of a large site may consume a lot of
resources.
Default: NO
mdtm_write
When enabled, this setting will allow MDTM to set file
modification times (subject to the usual access
checks).
Default: YES
no_anon_password
When enabled, this prevents vsftpd from asking for an
anonymous password - the anonymous user will log
straight in.
Default: NO
no_log_lock
When enabled, this prevents vsftpd from taking a file
lock when writing to log files. This option should gen-
erally not be enabled. It exists to workaround operat-
ing system bugs such as the Solaris / Veritas filesys-
tem combination which has been observed to sometimes
exhibit hangs trying to lock log files.
Default: NO
one_process_model
If you have a Linux 2.4 kernel, it is possible to use a
different security model which only uses one process
per connection. It is a less pure security model, but
gains you performance. You really don't want to enable
this unless you know what you are doing, and your site
supports huge numbers of simultaneously connected
users.
Default: NO
passwd_chroot_enable
If enabled, along with chroot_local_user , then a
chroot() jail location may be specified on a per-user
basis. Each user's jail is derived from their home
directory string in /etc/passwd. The occurrence of /./
in the home directory string denotes that the jail is
at that particular location in the path.
Default: NO
pasv_addr_resolve
Set to YES if you want to use a hostname (as opposed to
IP address) in the pasv_address option.
Default: NO
pasv_enable
Set to NO if you want to disallow the PASV method of
obtaining a data connection.
Default: YES
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 legiti-
mate use for this is in some form of secure tunnelling
scheme, or perhaps to facilitate FXP support.
Default: NO
port_enable
Set to NO if you want to disallow the PORT method of
obtaining a data connection.
Default: YES
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
require_cert
If set to yes, all SSL client connections are required
to present a client certificate. The degree of valida-
tion applied to this certificate is controlled by
validate_cert (Added in v2.0.6).
Default: NO
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).
Although this is a secure default, it may break many
FTP clients, so you may want to disable it. For a dis-
cussion of the consequences, see
http://scarybeastsecurity.blogspot.com/2009/02/vsftpd-
210-released.html (Added in v2.1.0).
Default: YES
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 sub-
stitute could be to use a 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
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 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
session_support
This controls whether vsftpd attempts to maintain ses-
sions 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
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, download-
ing etc). You probably want to leave this off for secu-
rity purposes.
Default: NO
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 ena-
bling this option, you are declaring that you trust the
security of your installed OpenSSL library.
Default: NO
ssl_request_cert
If enabled, vsftpd will request (but not necessarily
require; see require_cert)acertificateonincomingSSL
should not cause any trouble at all, but IBM zOS seems
to have issues. (New in v2.0.7).
Default: YES
ssl_sslv2
Only applies if ssl_enable is activated. If enabled,
this option will permit SSL v2 protocol connections.
TLS v1 connections are preferred.
Default: NO
ssl_sslv3
Only applies if ssl_enable is activated. If enabled,
this option will permit SSL v3 protocol connections.
TLS v1 connections are preferred.
Default: NO
ssl_tlsv1
Only applies if ssl_enable is activated. If enabled,
this option will permit TLS v1 protocol connections.
TLS v1 connections are preferred.
Default: YES
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. Unfor-
tunately, it is not enabled by default because so few
clients get it right. (New in v2.0.7).
Default: NO
strict_ssl_write_shutdown
If enabled, SSL data downloads are required to ter-
minate 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
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
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
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
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 /etc/passwd may be found
within the _current_ chroot() jail.
Default: NO
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
use_sendfile
An internal setting used for testing the relative bene-
fit of using the sendfile() system call on your plat-
form.
Default: YES
userlist_deny
This option is examined if 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 userlist_file. When login is
denied, the denial is issued before the user is asked
for a password.
Default: YES
userlist_enable
If enabled, vsftpd will load a list of usernames, from
the filename given by 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 userlist_deny.
Default: NO
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
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
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
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
vsftpd_log_file.
Default: NO (but the sample config file enables it)
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 statis-
tics 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 xferlog_file.
Default: NO
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.
accept_timeout
The timeout, in seconds, for a remote client to estab-
lish connection with a PASV style data connection.
Default: 60
anon_max_rate
The maximum data transfer rate permitted, in bytes per
second, for anonymous clients.
Default: 0 (unlimited)
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
chown_upload_mode
The file mode to force for chown()ed anonymous uploads.
(Added in v2.0.6).
Default: 0600
connect_timeout
The timeout, in seconds, for a remote client to respond
to our PORT style data connection.
Default: 60
data_connection_timeout
The timeout, in seconds, which is roughly the maximum
time we permit data transfers to stall for with no pro-
gress. If the timeout triggers, the remote client is
kicked off.
Default: 300
delay_failed_login
The number of seconds to pause prior to reporting a
failed login.
Default: 1
delay_successful_login
The number of seconds to pause prior to allowing a suc-
cessful login.
Default: 0
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 exe-
cutable.
Default: 0666
ftp_data_port
The port from which PORT style connections originate
(as long as the poorly named connect_from_port_20 is
enabled).
Default: 20
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
listen_port
If vsftpd is in standalone mode, this is the port it
will listen on for incoming FTP connections.
Default: 21
local_max_rate
The maximum data transfer rate permitted, in bytes per
second, for local authenticated users.
Default: 0 (unlimited)
local_umask
The value that the umask for file creation is set to
for local 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
max_clients
If vsftpd is in standalone mode, this is the maximum
number of clients which may be connected. Any addi-
tional clients connecting will get an error message.
Default: 0 (unlimited)
max_login_fails
After this many login failures, the session is killed.
Default: 3
max_per_ip
If vsftpd is in standalone mode, this is the maximum
number of clients which may be connected from the same
source internet address. A client will get an error
message if they go over this limit.
Default: 0 (unlimited)
pasv_max_port
The maximum port to allocate for PASV style data con-
nections. Can be used to specify a narrow port range to
assist firewalling.
Default: 0 (use any port)
pasv_min_port
The minimum port to allocate for PASV style data con-
nections. Can be used to specify a narrow port range to
assist firewalling.
Default: 0 (use any port)
trans_chunk_size
You probably don't want to change this, but try setting
it to something like 8192 for a much smoother bandwidth
limiter.
Default: 0 (let vsftpd pick a sensible setting)
STRING OPTIONS
Below is a list of string options.
anon_root
This option represents a directory which vsftpd will
try to change into after an anonymous login. Failure is
silently ignored.
Default: (none)
banned_email_file
This option is the name of a file containing a list of
anonymous e-mail passwords which are not permitted.
This file is consulted if the option deny_email_enable
is enabled.
Default: /etc/vsftpd.banned_emails
banner_file
This option is the name of a file containing text to
display when someone connects to the server. If set, it
overrides the banner string provided by the ftpd_banner
option.
Default: (none)
ca_certs_file
This option is the name of a file to load Certificate
Authority certs from, for the purpose of validating
client certs. The loaded certs are also advertised to
the client, to cater for TLSv1.0 clients such as the
z/OS FTP client. Regrettably, the default SSL CA cert
paths are not used, because of vsftpd's use of res-
tricted filesystem spaces (chroot). (Added in v2.0.6).
Default: (none)
chown_username
This is the name of the user who is given ownership of
anonymously uploaded files. This option is only
relevant if another option, chown_uploads, is set.
Default: root
chroot_list_file
The option is the name of a file containing a list of
local users which will be placed in a chroot() jail in
their home directory. This option is only relevant if
the option chroot_list_enable is enabled. If the option
chroot_local_user is enabled, then the list file
becomes a list of users to NOT place in a chroot()
jail.
Default: /etc/vsftpd.chroot_list
cmds_allowed
This options specifies a comma separated list of
allowed FTP commands (post login. USER, PASS and QUIT
and others are always allowed pre-login). Other com-
mands are rejected. This is a powerful method of really
locking down an FTP server. Example:
cmds_allowed=PASV,RETR,QUIT
Default: (none)
cmds_denied
This options specifies a comma separated list of denied
FTP commands (post login. USER, PASS, QUIT and others
are always allowed pre-login). If a command appears on
both this and cmds_allowed then the denial takes pre-
cedence. (Added in v2.1.0).
Default: (none)
deny_file
This option can be used to set a pattern for filenames
(and directory names etc.) which should not be accessi-
ble in any way. The affected items are not hidden, but
any attempt to do anything to them (download, change
into directory, affect something within directory etc.)
will be denied. This option is very simple, and should
not be used for serious access control - the
filesystem's permissions should be used in preference.
However, this option may be useful in certain virtual
user setups. In particular aware that if a filename is
accessible by a variety of names (perhaps due to sym-
bolic links or hard links), then care must be taken to
deny access to all the names. Access will be denied to
items if their name contains the string given by
hide_file, or if they match the regular expression
specified by hide_file. Note that vsftpd's regular
expression matching code is a simple implementation
which is a subset of full regular expression func-
tionality. Because of this, you will need to carefully
and exhaustively test any application of this option.
And you are recommended to use filesystem permissions
for any important security policies due to their
greater reliability. Supported regex syntax is any
number of *, ? and unnested {,} operators. Regex match-
ing is only supported on the last component of a path,
e.g. a/b/? is supported but a/?/c is not. Example:
deny_file={*.mp3,*.mov,.private}
Default: (none)
dsa_cert_file
This option specifies the location of the DSA certifi-
cate to use for SSL encrypted connections.
Default: (none - an RSA certificate suffices)
dsa_private_key_file
This option specifies the location of the DSA private
key to use for SSL encrypted connections. If this
option is not set, the private key is expected to be in
the same file as the certificate.
Default: (none)
email_password_file
This option can be used to provide an alternate file
for usage by the secure_email_list_enable setting.
Default: /etc/vsftpd.email_passwords
ftp_username
This is the name of the user we use for handling
anonymous FTP. The home directory of this user is the
root of the anonymous FTP area.
Default: ftp
ftpd_banner
This string option allows you to override the greeting
banner displayed by vsftpd when a connection first
comes in.
Default: (none - default vsftpd banner is displayed)
guest_username
See the boolean setting guest_enable for a description
of what constitutes a guest login. This setting is the
real username which guest users are mapped to.
Default: ftp
hide_file
This option can be used to set a pattern for filenames
(and directory names etc.) which should be hidden from
directory listings. Despite being hidden, the files /
directories etc. are fully accessible to clients who
know what names to actually use. Items will be hidden
if their names contain the string given by hide_file,
or if they match the regular expression specified by
hide_file. Note that vsftpd's regular expression match-
ing code is a simple implementation which is a subset
of full regular expression functionality. See
deny_file for details of exactly what regex syntax is
supported. Example: hide_file={*.mp3,.hidden,hide*,h?}
Default: (none)
listen_address
If vsftpd is in standalone mode, the default listen
address (of all local interfaces) may be overridden by
this setting. Provide a numeric IP address.
Default: (none)
listen_address6
Like listen_address, but specifies a default listen
address for the IPv6 listener (which is used if
listen_ipv6 is set). Format is standard IPv6 address
format.
Default: (none)
local_root
This option represents a directory which vsftpd will
try to change into after a local (i.e. non-anonymous)
login. Failure is silently ignored.
Default: (none)
message_file
This option is the name of the file we look for when a
new directory is entered. The contents are displayed to
the remote user. This option is only relevant if the
option dirmessage_enable is enabled.
Default: .message
nopriv_user
This is the name of the user that is used by vsftpd
when it wants to be totally unprivileged. Note that
this should be a dedicated user, rather than nobody.
The user nobody tends to be used for rather a lot of
important things on most machines.
Default: nobody
pam_service_name
This string is the name of the PAM service vsftpd will
use.
Default: ftp
pasv_address
Use this option to override the IP address that vsftpd
will advertise in response to the PASV command. Provide
a numeric IP address, unless pasv_addr_resolve is
enabled, in which case you can provide a hostname which
will be DNS resolved for you at startup.
Default: (none - the address is taken from the incoming
connected socket)
rsa_cert_file
This option specifies the location of the RSA certifi-
cate to use for SSL encrypted connections.
Default: /usr/share/ssl/certs/vsftpd.pem
rsa_private_key_file
This option specifies the location of the RSA private
key to use for SSL encrypted connections. If this
option is not set, the private key is expected to be in
the same file as the certificate.
Default: (none)
secure_chroot_dir
This option should be the name of a directory which is
empty. Also, the directory should not be writable by
the ftp user. This directory is used as a secure
chroot() jail at times vsftpd does not require
filesystem access.
Default: /usr/share/empty
ssl_ciphers
This option can be used to select which SSL ciphers
vsftpd will allow for encrypted SSL connections. See
the ciphers man page for further details. Note that
restricting ciphers can be a useful security precaution
as it prevents malicious remote parties forcing a
cipher which they have found problems with.
Default: DES-CBC3-SHA
user_config_dir
This powerful option allows the override of any config
option specified in the manual page, on a per-user
basis. Usage is simple, and is best illustrated with an
example. If you set user_config_dir to be
/etc/vsftpd_user_conf and then log on as the user
"chris", then vsftpd will apply the settings in the
file /etc/vsftpd_user_conf/chris for the duration of
the session. The format of this file is as detailed in
this manual page! PLEASE NOTE that not all settings are
effective on a per-user basis. For example, many set-
tings only prior to the user's session being started.
Examples of settings which will not affect any behviour
on a per-user basis include listen_address,
banner_file, max_per_ip, max_clients, xferlog_file,
etc.
Default: (none)
user_sub_token
This option is useful is conjunction with virtual
users. It is used to automatically generate a home
directory for each virtual user, based on a template.
For example, if the home directory of the real user
specified via guest_username is /home/virtual/$USER,
and user_sub_token is set to $USER, then when virtual
user fred logs in, he will end up (usually chroot()'ed)
in the directory /home/virtual/fred. This option also
takes affect if local_root contains user_sub_token.
Default: (none)
userlist_file
This option is the name of the file loaded when the
userlist_enable option is active.
Default: /etc/vsftpd.user_list
vsftpd_log_file
This option is the name of the file to which we write
the vsftpd style log file. This log is only written if
the option xferlog_enable is set, and
xferlog_std_format is NOT set. Alternatively, it is
written if you have set the option dual_log_enable.
One further complication - if you have set
syslog_enable, then this file is not written and output
is sent to the system log instead.
Default: /var/log/vsftpd.log
xferlog_file
This option is the name of the file to which we write
the wu-ftpd style transfer log. The transfer log is
only written if the option xferlog_enable is set, along
with xferlog_std_format. Alternatively, it is written
if you have set the option dual_log_enable.
Default: /var/log/xferlog
AUTHOR
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Copyright © 2004-2010 Jo HoSeok. All rights reserved. |