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VSFTPD.CONF

Section: File Formats (5)
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NAME

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 connections.

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

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

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

Default: NO

ascii_upload_enable

Default: NO

async_abor_enable

Default: NO

background

Default: NO

check_shell

Default: YES

chmod_enable

Default: YES

chown_uploads

If enabled, all anonymously uploaded files will have the ownership changed to the user specified in the setting chown_username. This is useful from an administrative, 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, especially 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

Default: NO (but the sample config file enables it)

debug_ssl

Default: NO

delete_failed_uploads

Default: NO

deny_email_enable

If activated, you may provide a list of anonymous password 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

Default: YES

dirmessage_enable

If enabled, users of the FTP server can be shown messages 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 setting message_file.

Default: NO (but the sample config file enables it)

download_enable

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

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

Default: NO

implicit_ssl

Default: NO

listen

Default: YES

listen_ipv6

Default: NO

local_enable

Default: NO

lock_upload_files

Default: YES

log_ftp_protocol

Default: NO

ls_recurse_enable

Default: NO

mdtm_write

Default: YES

no_anon_password

Default: NO

no_log_lock

Default: NO

one_process_model

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

Default: YES

pasv_promiscuous

Default: NO

port_enable

Default: YES

port_promiscuous

Default: NO

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 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 discussion of the consequences, see (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 substitute 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_filesetting. The file format is one password per line, no extra whitespace. The default filename is /etc/vsftpd.email_passwords.

Default: NO

session_support

Default: NO

setproctitle_enable

Default: NO

ssl_enable

Default: NO

ssl_request_cert

If enabled, vsftpd will request (but not necessarily require; see require_cert)a

certificateon

incomingSSL

connections.Normally

this 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

Default: NO

strict_ssl_write_shutdown

Default: NO

syslog_enable

Default: NO

tcp_wrappers

Default: NO

text_userdb_names

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

Default: NO

use_sendfile

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

Default: NO

virtual_use_local_privs

Default: NO

write_enable

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 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 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

Default: 60

anon_max_rate

Default: 0 (unlimited)

anon_umask

Default: 077

chown_upload_mode

Default: 0600

connect_timeout

Default: 60

data_connection_timeout

Default: 300

delay_failed_login

Default: 1

delay_successful_login

Default: 0

file_open_mode

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

Default: 300

listen_port

Default: 21

local_max_rate

Default: 0 (unlimited)

local_umask

Default: 077

max_clients

Default: 0 (unlimited)

max_login_fails

Default: 3

max_per_ip

Default: 0 (unlimited)

pasv_max_port

Default: 0 (use any port)

pasv_min_port

Default: 0 (use any port)

trans_chunk_size

Default: 0 (let vsftpd pick a sensible setting)

STRING OPTIONS

Below is a list of string options.

anon_root

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

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

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 precedence. (Added in v2.1.0).

Default: (none)

deny_file

Default: (none)

dsa_cert_file

Default: (none - an RSA certificate suffices)

dsa_private_key_file

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

Default: ftp

ftpd_banner

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 matching 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

Default: (none)

listen_address6

Default: (none)

local_root

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

Default: nobody

pam_service_name

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

Default: /usr/share/ssl/certs/vsftpd.pem

rsa_private_key_file

Default: (none)

secure_chroot_dir

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 settings 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