Provided by: vsftpd_2.3.5-3ubuntu1_i386 bug

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 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
              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

       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. Unfortunately, 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.  control  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  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
              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  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
              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  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
              If set to NO, all download requests will give permission 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 listening 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 wherever 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 enabling 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  generally not be
              enabled. It exists to workaround operating system bugs  such  as
              the  Solaris  /  Veritas  filesystem  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 legitimate 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 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
              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 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_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 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

       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

       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

       ssl_request_cert
              If  enabled,  vsftpd  will request (but not necessarily require;
              see
              require_cert)acertificateonincomingSSLconnections.Normallythis
              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. Unfortunately,  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 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

       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  benefit  of
              using the sendfile() system call on your platform.

              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 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
              The  timeout,  in  seconds,  for  a  remote  client to establish
              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 progress. 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 successful
              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 executable.

              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  additional  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 connections.
              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 connections.
              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 restricted 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  commands  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  precedence.  (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 accessible 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  symbolic 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 functionality. 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 matching 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 certificate 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  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
              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: vsftpd

       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 certificate 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: /var/run/vsftpd/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

AUTHOR

       scarybeasts@gmail.com

                                                                VSFTPD.CONF(5)