vsftpd-1.1.3配制文件vsftpd.conf

　　# Example config file /etc/vsftpd.conf
　　#
　　# The default compiled in settings are very paranoid. This sample file
　　# loosens things up a bit, to make the ftp daemon more usable.
　　#
　　# Allow anonymous FTP?
　　anonymous_enable=YES
　　#
　　# Uncomment this to allow local users to log in.
　　#local_enable=YES
　　#
　　# Uncomment this to enable any form of FTP write command.
　　#write_enable=YES
　　#
　　# Default umask for local users is 077. You may wish to change this to 022,
　　# if your users expect that (022 is used by most other ftpd's)
　　#local_umask=022
　　#
　　# Uncomment this to allow the anonymous FTP user to upload files. This only
　　# has an effect if the above global write enable is activated. Also, you will
　　# obviously need to create a directory writable by the FTP user.
　　#anon_upload_enable=YES
　　#
　　# Uncomment this if you want the anonymous FTP user to be able to create
　　# new directories.
　　#anon_mkdir_write_enable=YES
　　#
　　# Activate directory messages - messages given to remote users when they
　　# go into a certain directory.
　　dirmessage_enable=YES
　　#
　　# Activate logging of uploads/downloads.
　　xferlog_enable=YES
　　#
　　# Make sure PORT transfer connections originate from port 20 (ftp-data).
　　connect_from_port_20=YES
　　#
　　# If you want, you can arrange for uploaded anonymous files to be owned by
　　# a different user. Note! Using "root" for uploaded files is not
　　# recommended!
　　#chown_uploads=YES
　　#chown_username=whoever
　　#
　　# You may override where the log file goes if you like. The default is shown
　　# below.
　　#xferlog_file=/var/log/vsftpd.log
　　#
　　# If you want, you can have your log file in standard ftpd xferlog format
　　#xferlog_std_format=YES
　　#
　　# You may change the default value for timing out an idle session.
　　#idle_session_timeout=600
　　#
　　# You may change the default value for timing out a data connection.
　　#data_connection_timeout=120
　　#
　　# It is recommended that you define on your system a unique user which the
　　# ftp server can use as a totally isolated and unprivileged user.
　　#nopriv_user=ftpsecure
　　#
　　# Enable this and the server will recognise asynchronous ABOR requests. Not
　　# recommended for security (the code is non-trivial). Not enabling it,
　　# however, may confuse older FTP clients.
　　#async_abor_enable=YES
　　#
　　# By default the server will pretend to allow ASCII mode but in fact ignore
　　# the request. Turn on the below options to have the server actually do ASCII
　　# mangling on files when in ASCII mode.
　　# Beware that turning on ascii_download_enable enables malicious remote parties
　　# to consume your I/O resources, by issuing the command "SIZE /big/file" in
　　# ASCII mode.
　　# These ASCII options are split into upload and download because you may wish
　　# to enable ASCII uploads (to prevent uploaded scripts etc. from breaking),
　　# without the DoS risk of SIZE and ASCII downloads. ASCII mangling should be
　　# on the client anyway..
　　#ascii_upload_enable=YES
　　#ascii_download_enable=YES
　　#
　　# You may fully customise the login banner string:
　　#ftpd_banner=Welcome to blah FTP service.
　　#
　　# You may specify a file of disallowed anonymous e-mail addresses. Apparently
　　# useful for combatting certain DoS attacks.
　　#deny_email_enable=YES
　　# (default follows)
　　#banned_email_file=/etc/vsftpd.banned_emails
　　#
　　# You may specify an explicit list of local users to chroot() to their home
　　# directory. If chroot_local_user is YES, then this list becomes a list of
　　# users to NOT chroot().
　　#chroot_list_enable=YES
　　# (default follows)
　　#chroot_list_file=/etc/vsftpd.chroot_list
　　#
　　# You may activate the "-R" option to the builtin ls. This is disabled by
　　# default to avoid remote users being able to cause excessive I/O on large
　　# sites. However, some broken FTP clients such as "ncftp" and "mirror" assume
　　# the presence of the "-R" option, so there is a strong case for enabling it.
　　#ls_recurse_enable=YES
　　关于vsftpd.conf中一些极为重要的说明：有些是在vsftpd.conf中是没有的，我们也可以加上
　　.TH VSFTPD.CONF 5
　　.SH NAME
　　vsftpd.conf, the config file for vsftpd
　　.SH DESCRIPTION
　　vsftpd.conf may be used to control various aspects of vsftpd's behaviour. By
　　default, vsftpd looks for this file at the location
　　.BR /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
　　.BR xinetd
　　to launch vsftpd with different configuration files on a per virtual host
　　basis.
　　.SH 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.
　　.SH BOOLEAN OPTIONS
　　Below is a list of boolean options. The value for a boolean option may be set
　　to
　　.BR YES
　　or
　　.BR NO .
　　.TP
　　.B 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
　　.BR write_enable
　　must be activated, and the anonymous ftp user must have write permission on
　　the parent directory.
　　Default: NO
　　.TP
　　.B 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 generally not recommended but included for completeness.
　　Default: NO
　　.TP
　　.B anon_upload_enable
　　If set to YES, anonymous users will be permitted to upload files under certain
　　conditions. For this to work, the option
　　.BR write_enable
　　must be activated, and the anonymous ftp user must have write permission on
　　desired upload locations.
　　Default: NO
　　.TP
　　.B 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
　　.TP
　　.B anonymous_enable
　　Controls whether anonymous logins are permitted or not. If enabled,
　　both the usernames
　　.BR ftp
　　and
　　.BR anonymous
　　are recognised as anonymous logins.
　　Default: YES
　　.TP
　　.B ascii_download_enable
　　When enabled, ASCII mode data transfers will be honoured on downloads.
　　Default: NO
　　.TP
　　.B ascii_upload_enable
　　When enabled, ASCII mode data transfers will be honoured on uploads.
　　Default: NO
　　.TP
　　.B 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. Addtionally, this feature
　　is awkward to handle, so it is disabled by default. Unfortunately, some FTP
　　clients will hang when cancelling a transfer unless this feature is available,
　　so you may wish to enable it.
　　Default: NO
　　.TP
　　.B 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
　　.TP
　　.B chown_uploads
　　If enabled, all anonymously uploaded files will have the ownership changed
　　to the user specified in the setting
　　.BR chown_username .
　　This is useful from an administrative, and perhaps security, standpoint.
　　Default: NO
　　.TP
　　.B 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
　　.BR chroot_list_file
　　setting.
　　Default: NO
　　.TP
　　.B chroot_local_user
　　If set to YES, local users will be placed in a chroot() jail in their home
　　directory after login.
　　.BR Warning:
　　This option has security implications, especially if the users have upload
　　permission, or shell aclearcase/" target="_blank" >ccess. 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
　　.TP
　　.B 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)
　　.TP
　　.B 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
　　.BR banned_email_file
　　setting.
　　Default: NO
　　.TP
　　.B 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
　　.BR message_file .
　　Default: NO (but the sample config file enables it)
　　.TP
　　.B guest_enable
　　If enabled, all non-anonymous logins are classed as "guest" logins. A guest
　　login is remapped to the user specified in the
　　.BR guest_username
　　setting.
　　Default: NO
　　.TP
　　.B hide_ids
　　If enabled, all user and group information in directory listings will be
　　displayed as "ftp".
　　Default: NO
　　.TP
　　.B 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 listening for and
　　handling incoming connections.
　　Default: NO
　　.TP
　　.B local_enable
　　Controls whether local logins are permitted or not. If enabled, normal
　　user accounts in /etc/passwd may be used to log in.
　　Default: NO
　　.TP
　　.B 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
　　.TP
　　.B 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
　　.TP
　　.B no_anon_password
　　When enabled, this prevents vsftpd from asking for an anonymous password -
　　the anonymous user will log straight in.
　　Default: NO
　　.TP
　　.B 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
　　.TP
　　.B passwd_chroot_enable
　　If enabled, along with
　　.BR 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
　　occurence of /./ in the home directory string denotes that the jail is at that
　　particular location in the path.
　　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.
　　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 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 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 use_localtime
　　If enabled, vsftpd will display directory listings with the 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 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 xferlog_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.
　　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 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 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
　　.B 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
　　.TP
　　.B max_clients
　　If vsftpd is in standalone mode, this is the maximum number of clients which
　　may be connected. Any additional clients connecting will get an error message.
　　Default: 0 (unlimited)
　　.TP
　　.B 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)
　　.TP
　　.B pasv_max_port
　　The maximum port to allocate for PASV style data connections. Can be used to
　　specify a narrow port range to assist firewalling.
　　Default: 0 (use any port)
　　.TP
　　.B pasv_min_port
　　The minimum port to allocate for PASV style data connections. Can be used to
　　specify a narrow port range to assist firewalling.
　　Default: 0 (use any port)
　　.SH STRING OPTIONS
　　Below is a list of string options.
　　.TP
　　.B anon_root
　　This option represents a directory which vsftpd will try to change into
　　after an anonymous login. Failure is silently ignored.
　　Default: (none)
　　.TP
　　.B 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
　　.BR deny_email_enable
　　is enabled.
　　Default: /etc/vsftpd.banned_emails
　　.TP
　　.B 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
　　.BR ftpd_banner
　　option.
　　Default: (none)
　　.TP
　　.B 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,
　　.BR chown_uploads ,
　　is set.
　　Default: root
　　.TP
　　.B 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
　　.BR chroot_list_enable
　　is enabled, and the option
　　.BR chroot_local_user
　　is disabled.
　　Default: /etc/vsftpd.chroot_list
　　.TP
　　.B guest_username
　　See the boolean setting
　　.BR 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
　　.TP
　　.B 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
　　.TP
　　.B 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)
　　.TP
　　.B 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)
　　.TP
　　.B 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)
　　.TP
　　.B 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
　　.BR dirmessage_enable
　　is enabled.
　　Default: .message
　　.TP
　　.B nopriv_user
　　This is the name of the user that is used by vsftpd when it want 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
　　.TP
　　.B pam_service_name
　　This string is the name of the PAM service vsftpd will use.
　　Default: ftp
　　.TP
　　.B 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.
　　Default: (none - the address is taken from the incoming connected socket)
　　.TP
　　.B 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
　　.TP
　　.B 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
　　.BR user_config_dir
　　to be
　　.BR /etc/vsftpd_user_conf
　　and then log on as the user "chris", then vsftpd will apply the settings in
　　the file
　　.BR /etc/vsftpd_user_conf/chris
　　for the duration of the session. The format of this file is as detailed in
　　this manual page!
　　Default: (none)
　　.TP
　　.B userlist_file
　　This option is the name of the file loaded when the
　　.BR userlist_enable
　　option is active.
　　Default: /etc/vsftpd.user_list
　　.TP
　　.B xferlog_file
　　This option is the name of the file to which we write the transfer log. The
　　transfer log is only written if the option
　　.BR xferlog_enable
　　is set.
　　Default: /var/log/vsftpd.log
　　.SH AUTHOR
　　chris@scary.beasts.org
　　
　　
　　
　　

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