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Linux 2.6 - man page for rsyncd.conf (linux section 5)

rsyncd.conf(5)									   rsyncd.conf(5)

       rsyncd.conf -- configuration file for rsync in daemon mode


       The rsyncd.conf file is the runtime configuration file for rsync when run as an rsync dae-

       The rsyncd.conf file controls authentication, access, logging and available modules.

       The file consists of modules and parameters. A module begins with the name of  the  module
       in  square brackets and continues until the next module begins. Modules contain parameters
       of the form "name = value".

       The file is line-based -- that is, each newline-terminated line represents either  a  com-
       ment, a module name or a parameter.

       Only  the  first equals sign in a parameter is significant. Whitespace before or after the
       first equals sign is discarded. Leading, trailing and internal whitespace  in  module  and
       parameter  names  is  irrelevant.  Leading and trailing whitespace in a parameter value is
       discarded. Internal whitespace within a parameter value is retained verbatim.

       Any line beginning with a hash (#) is ignored, as are lines  containing	only  whitespace.
       Note  that a hash in the middle of a line is used as-is, hence it is not possible to put a
       comment at the end of a parameter; the hash and following text becomes part of the parame-

       Any line ending in a \ is "continued" on the next line in the customary UNIX fashion.

       The  values  following  the  equals  sign in parameters are all either a string (no quotes
       needed) or a boolean, which may be given as yes/no, 0/1 or true/false. Case is not signif-
       icant in boolean values, but is preserved in string values.

       The rsync daemon is launched by specifying the --daemon option to rsync.

       The daemon must run with root privileges if you wish to use chroot, to bind to a port num-
       bered under 1024 (as is the default 873), or to set file ownership.   Otherwise,  it  must
       just have permission to read and write the appropriate data, log, and lock files.

       You can launch it either via inetd, as a stand-alone daemon, or from an rsync client via a
       remote shell.  If run as a stand-alone daemon then just run the command	"rsync	--daemon"
       from a suitable startup script.

       When run via inetd you should add a line like this to /etc/services:

	 rsync		 873/tcp

       and a single line something like this to /etc/inetd.conf:

	 rsync	 stream  tcp	 nowait  root	/usr/bin/rsync rsyncd --daemon

       Replace	"/usr/bin/rsync"  with the path to where you have rsync installed on your system.
       You will then need to send inetd a HUP signal to tell it to reread its config file.

       Note that you should not send the rsync daemon a HUP signal to  force  it  to  reread  the
       rsyncd.conf file. The file is re-read on each client connection.

       The first parameters in the file (before a [module] header) are the global parameters.

       You  may also include any module parameters in the global part of the config file in which
       case the supplied value will override the default for that parameter.

       motd file
	      This parameter allows you to specify a "message of the day" to display  to  clients
	      on  each connect. This usually contains site information and any legal notices. The
	      default is no motd file.

       pid file
	      This parameter tells the rsync daemon to write its process ID to that file.  If the
	      file already exists, the rsync daemon will abort rather than overwrite the file.

       port   You  can	override  the  default	port the daemon will listen on by specifying this
	      value (defaults to 873).	This is ignored if the daemon is being run by inetd,  and
	      is superseded by the --port command-line option.

	      You  can	override  the  default IP address the daemon will listen on by specifying
	      this value.  This is ignored if the daemon is being run by inetd, and is superseded
	      by the --address command-line option.

       socket options
	      This parameter can provide endless fun for people who like to tune their systems to
	      the utmost degree. You can set all sorts of socket options which may make transfers
	      faster (or slower!). Read the man page for the setsockopt() system call for details
	      on some of the options you may be able to set. By default no special socket options
	      are  set.   These  settings  can	also be specified via the --sockopts command-line

       After the global parameters you should define a number of modules, each module  exports	a
       directory  tree	as  a  symbolic name. Modules are exported by specifying a module name in
       square brackets [module] followed by the parameters for that module.  The module name can-
       not  contain  a	slash or a closing square bracket.  If the name contains whitespace, each
       internal sequence of whitespace will be changed into a  single  space,  while  leading  or
       trailing whitespace will be discarded.

	      This  parameter specifies a description string that is displayed next to the module
	      name when clients obtain a list of available modules. The default is no comment.

       path   This parameter specifies the directory in the daemon's filesystem to make available
	      in this module.  You must specify this parameter for each module in rsyncd.conf.

       use chroot
	      If "use chroot" is true, the rsync daemon will chroot to the "path" before starting
	      the file transfer with the client.  This has  the  advantage  of	extra  protection
	      against  possible  implementation  security  holes, but it has the disadvantages of
	      requiring super-user privileges, of not being able to follow  symbolic  links  that
	      are  either  absolute  or  outside  of  the  new root path, and of complicating the
	      preservation of users and groups by name (see below).

	      As an additional safety feature, you can specify a dot-dir in the  module's  "path"
	      to indicate the point where the chroot should occur.  This allows rsync to run in a
	      chroot with a non-"/" path for the top  of  the  transfer  hierarchy.   Doing  this
	      guards  against  unintended library loading (since those absolute paths will not be
	      inside the transfer hierarchy unless you have used an unwise  pathname),	and  lets
	      you  setup libraries for the chroot that are outside of the transfer.  For example,
	      specifying "/var/rsync/./module1" will chroot to the "/var/rsync" directory and set
	      the  inside-chroot  path to "/module1".  If you had omitted the dot-dir, the chroot
	      would have used the whole path, and the inside-chroot path would have been "/".

	      When "use chroot" is false or the inside-chroot path is not "/",	rsync  will:  (1)
	      munge  symlinks  by default for security reasons (see "munge symlinks" for a way to
	      turn this off, but only if you trust your users), (2) substitute leading slashes in
	      absolute paths with the module's path (so that options such as --backup-dir, --com-
	      pare-dest, etc. interpret an absolute path as rooted in the module's  "path"  dir),
	      and  (3)	trim ".." path elements from args if rsync believes they would escape the
	      module hierarchy.  The default for "use chroot" is true, and is  the  safer  choice
	      (especially if the module is not read-only).

	      When  this  parameter is enabled, rsync will not attempt to map users and groups by
	      name (by default), but instead copy IDs as though --numeric-ids had been specified.
	      In order to enable name-mapping, rsync needs to be able to use the standard library
	      functions for looking up names and IDs (i.e.  getpwuid() , getgrgid() , getpwname()
	      , and getgrnam() ).  This means the rsync process in the chroot hierarchy will need
	      to have access to the resources used  by	these  library	functions  (traditionally
	      /etc/passwd and /etc/group, but perhaps additional dynamic libraries as well).

	      If  you copy the necessary resources into the module's chroot area, you should pro-
	      tect them through your OS's normal user/group or ACL settings (to prevent the rsync
	      module's	user  from being able to change them), and then hide them from the user's
	      view via "exclude" (see how in the discussion of that parameter).  At that point it
	      will  be	safe to enable the mapping of users and groups by name using the "numeric
	      ids" daemon parameter (see below).

	      Note also that you are free to setup custom user/group information  in  the  chroot
	      area  that is different from your normal system.	For example, you could abbreviate
	      the list of users and groups.

       numeric ids
	      Enabling this parameter disables the mapping of users and groups by  name  for  the
	      current  daemon  module.	 This  prevents  the  daemon  from  trying  to	load  any
	      user/group-related files or libraries.  This enabling makes the transfer behave  as
	      if  the  client had passed the --numeric-ids command-line option.  By default, this
	      parameter is enabled for chroot modules and disabled for non-chroot modules.

	      A chroot-enabled module should not have this parameter enabled unless you've  taken
	      steps  to  ensure that the module has the necessary resources it needs to translate
	      names, and that it is not possible for a user to change those resources.

       munge symlinks
	      This parameter tells rsync to modify all incoming symlinks in a way that makes them
	      unusable	but  recoverable  (see	below).  This should help protect your files from
	      user trickery when your daemon module is writable.  The default  is  disabled  when
	      "use chroot" is on and the inside-chroot path is "/", otherwise it is enabled.

	      If  you  disable this parameter on a daemon that is not read-only, there are tricks
	      that a user can play with uploaded symlinks to  access  daemon-excluded  items  (if
	      your  module  has any), and, if "use chroot" is off, rsync can even be tricked into
	      showing or changing data that is outside the module's path  (as  access-permissions

	      The  way	rsync  disables the use of symlinks is to prefix each one with the string
	      "/rsyncd-munged/".  This prevents the links from being used as long as that  direc-
	      tory  does  not exist.  When this parameter is enabled, rsync will refuse to run if
	      that path is a directory or a symlink to a directory.  When using the  "munge  sym-
	      links" parameter in a chroot area that has an inside-chroot path of "/", you should
	      add "/rsyncd-munged/" to the exclude setting for the module so that  a  user  can't
	      try to create it.

	      Note:   rsync makes no attempt to verify that any pre-existing symlinks in the mod-
	      ule's hierarchy are as safe as you want them to be  (unless,  of	course,  it  just
	      copied  in  the  whole  hierarchy).   If you setup an rsync daemon on a new area or
	      locally add symlinks, you can manually protect your symlinks from being  abused  by
	      prefixing "/rsyncd-munged/" to the start of every symlink's value.  There is a perl
	      script in the support directory of the source code named "munge-symlinks" that  can
	      be used to add or remove this prefix from your symlinks.

	      When  this  parameter  is disabled on a writable module and "use chroot" is off (or
	      the inside-chroot path is not "/"), incoming symlinks will be modified  to  drop	a
	      leading  slash  and  to  remove ".." path elements that rsync believes will allow a
	      symlink to escape the module's hierarchy.  There are tricky  ways  to  work  around
	      this,  though, so you had better trust your users if you choose this combination of

	      This specifies the name of the character set in which the  module's  filenames  are
	      stored.  If the client uses an --iconv option, the daemon will use the value of the
	      "charset" parameter regardless of the character set  the	client	actually  passed.
	      This  allows  the  daemon  to support charset conversion in a chroot module without
	      extra files in the chroot area, and also ensures that name-translation is done in a
	      consistent  manner.   If	the "charset" parameter is not set, the --iconv option is
	      refused, just as if "iconv" had been specified via "refuse options".

	      If you wish to force users to always use	--iconv  for  a  particular  module,  add
	      "no-iconv" to the "refuse options" parameter.  Keep in mind that this will restrict
	      access to your module to very new rsync clients.

       max connections
	      This parameter allows you to specify the maximum number of simultaneous connections
	      you  will  allow.   Any  clients	connecting when the maximum has been reached will
	      receive a message telling them to try later.  The default  is  0,  which	means  no
	      limit.  A negative value disables the module.  See also the "lock file" parameter.

       log file
	      When  the  "log file" parameter is set to a non-empty string, the rsync daemon will
	      log messages to the indicated file rather than using syslog. This  is  particularly
	      useful  on systems (such as AIX) where syslog() doesn't work for chrooted programs.
	      The file is opened before chroot() is called, allowing it to be placed outside  the
	      transfer.   If  this  value  is  set on a per-module basis instead of globally, the
	      global log will still contain any authorization failures or config-file error  mes-

	      If  the  daemon fails to open the specified file, it will fall back to using syslog
	      and output an error about the failure.  (Note that the failure to open  the  speci-
	      fied log file used to be a fatal error.)

       syslog facility
	      This  parameter  allows you to specify the syslog facility name to use when logging
	      messages from the rsync daemon. You may use any standard syslog facility name which
	      is  defined  on  your  system.  Common names are auth, authpriv, cron, daemon, ftp,
	      kern, lpr, mail, news,  security,  syslog,  user,  uucp,	local0,  local1,  local2,
	      local3, local4, local5, local6 and local7. The default is daemon.  This setting has
	      no effect if the "log file" setting is  a  non-empty  string  (either  set  in  the
	      per-modules settings, or inherited from the global settings).

       max verbosity
	      This parameter allows you to control the maximum amount of verbose information that
	      you'll allow the daemon to generate (since the information goes into the log file).
	      The default is 1, which allows the client to request one level of verbosity.

       lock file
	      This  parameter  specifies the file to use to support the "max connections" parame-
	      ter. The rsync daemon uses record locking on this file to ensure that the max  con-
	      nections	limit is not exceeded for the modules sharing the lock file.  The default
	      is /var/run/rsyncd.lock.

       read only
	      This parameter determines whether clients will be able to upload files or  not.  If
	      "read  only"  is true then any attempted uploads will fail. If "read only" is false
	      then uploads will be possible if file permissions on the daemon  side  allow  them.
	      The default is for all modules to be read only.

       write only
	      This parameter determines whether clients will be able to download files or not. If
	      "write only" is true then any attempted downloads will fail.  If	"write	only"  is
	      false  then downloads will be possible if file permissions on the daemon side allow
	      them.  The default is for this parameter to be disabled.

       list   This parameter determines if this module should be listed when the client asks  for
	      a listing of available modules. By setting this to false you can create hidden mod-
	      ules. The default is for modules to be listable.

       uid    This parameter specifies the user name or user ID that file transfers to	and  from
	      that  module  should  take place as when the daemon was run as root. In combination
	      with the "gid" parameter this determines what file permissions are  available.  The
	      default is uid -2, which is normally the user "nobody".

       gid    This parameter specifies the group name or group ID that file transfers to and from
	      that module should take place as when the daemon was run as root. This  complements
	      the "uid" parameter. The default is gid -2, which is normally the group "nobody".

       fake super
	      Setting  "fake super = yes" for a module causes the daemon side to behave as if the
	      --fake-super  command-line  option  had  been  specified.   This	allows	the  full
	      attributes  of  a file to be stored without having to have the daemon actually run-
	      ning as root.

       filter The daemon has its own filter chain that determines what	files  it  will  let  the
	      client access.  This chain is not sent to the client and is independent of any fil-
	      ters the client may have specified.  Files excluded  by  the  daemon  filter  chain
	      (daemon-excluded	files)	are  treated  as non-existent if the client tries to pull
	      them, are skipped with an error message if the client tries to push them	(trigger-
	      ing  exit code 23), and are never deleted from the module.  You can use daemon fil-
	      ters to prevent clients from downloading or tampering with  private  administrative
	      files, such as files you may add to support uid/gid name translations.

	      The  daemon  filter  chain  is  built from the "filter", "include from", "include",
	      "exclude from", and "exclude" parameters, in that order of priority.  Anchored pat-
	      terns  are anchored at the root of the module.  To prevent access to an entire sub-
	      tree, for example, "/secret", you must exclude everything in the subtree; the easi-
	      est way to do this is with a triple-star pattern like "/secret/***".

	      The  "filter" parameter takes a space-separated list of daemon filter rules, though
	      it is smart enough to know not to split a token at an  internal  space  in  a  rule
	      (e.g.  "-  /foo	--  /bar"  is  parsed as two rules).  You may specify one or more
	      merge-file rules using the normal syntax.  Only one "filter" parameter can apply to
	      a given module in the config file, so put all the rules you want in a single param-
	      eter.  Note that per-directory merge-file rules do not provide as  much  protection
	      as  global rules, but they can be used to make --delete work better during a client
	      download operation if the per-dir merge files are included in the transfer and  the
	      client requests that they be used.

	      This  parameter  takes  a space-separated list of daemon exclude patterns.  As with
	      the client --exclude option, patterns can be qualified with "- " or "+ " to explic-
	      itly  indicate  exclude/include.	Only one "exclude" parameter can apply to a given
	      module.  See the "filter" parameter for a description of how excluded files  affect
	      the daemon.

	      Use  an  "include"  to  override	the effects of the "exclude" parameter.  Only one
	      "include" parameter can apply to a given module.	See the "filter" parameter for	a
	      description of how excluded files affect the daemon.

       exclude from
	      This  parameter  specifies  the  name  of a file on the daemon that contains daemon
	      exclude patterns, one per line.  Only one "exclude from" parameter can apply  to	a
	      given  module;  if  you have multiple exclude-from files, you can specify them as a
	      merge file in the "filter" parameter.  See the "filter" parameter for a description
	      of how excluded files affect the daemon.

       include from
	      Analogue	of  "exclude  from"  for  a  file  of  daemon include patterns.  Only one
	      "include from" parameter can apply to a given module.  See the  "filter"	parameter
	      for a description of how excluded files affect the daemon.

       incoming chmod
	      This  parameter  allows  you to specify a set of comma-separated chmod strings that
	      will affect the permissions of all incoming files (files that are being received by
	      the  daemon).   These  changes  happen after all other permission calculations, and
	      this will even override destination-default and/or existing  permissions	when  the
	      client  does  not specify --perms.  See the description of the --chmod rsync option
	      and the chmod(1) manpage for information on the format of this string.

       outgoing chmod
	      This parameter allows you to specify a set of comma-separated  chmod  strings  that
	      will  affect  the  permissions of all outgoing files (files that are being sent out
	      from the daemon).  These changes happen first, making the sent  permissions  appear
	      to  be  different  than  those  stored in the filesystem itself.	For instance, you
	      could disable group write permissions on the server while having it appear to be on
	      to  the  clients.  See the description of the --chmod rsync option and the chmod(1)
	      manpage for information on the format of this string.

       auth users
	      This parameter specifies a comma and space-separated list of usernames that will be
	      allowed  to connect to this module. The usernames do not need to exist on the local
	      system. The usernames may also contain shell wildcard characters. If  "auth  users"
	      is set then the client will be challenged to supply a username and password to con-
	      nect to the module. A challenge response authentication protocol is used	for  this
	      exchange.  The  plain text usernames and passwords are stored in the file specified
	      by the "secrets file" parameter. The default is for all users to be able to connect
	      without a password (this is called "anonymous rsync").

	      See  also the section entitled "USING RSYNC-DAEMON FEATURES VIA A REMOTE SHELL CON-
	      NECTION" in rsync(1) for information on how handle  an  rsyncd.conf-level  username
	      that differs from the remote-shell-level username when using a remote shell to con-
	      nect to an rsync daemon.

       secrets file
	      This parameter specifies the name of a file  that  contains  the	username:password
	      pairs used for authenticating this module. This file is only consulted if the "auth
	      users" parameter is specified. The file is line based and  contains  username:pass-
	      word  pairs  separated by a single colon. Any line starting with a hash (#) is con-
	      sidered a comment and is skipped. The passwords can contain any characters  but  be
	      warned  that many operating systems limit the length of passwords that can be typed
	      at the client end, so you may find that passwords longer than  8	characters  don't

	      There  is no default for the "secrets file" parameter, you must choose a name (such
	      as /etc/rsyncd.secrets).	The file must normally not be readable	by  "other";  see
	      "strict modes".

       strict modes
	      This  parameter  determines whether or not the permissions on the secrets file will
	      be checked.  If "strict modes" is true, then the secrets file must not be  readable
	      by  any  user  ID  other	than  the one that the rsync daemon is running under.  If
	      "strict modes" is false, the check is not performed.  The default  is  true.   This
	      parameter was added to accommodate rsync running on the Windows operating system.

       hosts allow
	      This  parameter allows you to specify a list of patterns that are matched against a
	      connecting clients hostname and IP address. If none of the patterns match then  the
	      connection is rejected.

	      Each pattern can be in one of five forms:

	      o      a dotted decimal IPv4 address of the form a.b.c.d, or an IPv6 address of the
		     form a:b:c::d:e:f. In this case the incoming machine's IP address must match

	      o      an address/mask in the form ipaddr/n where ipaddr is the IP address and n is
		     the number of one bits in the netmask.  All IP  addresses	which  match  the
		     masked IP address will be allowed in.

	      o      an  address/mask  in the form ipaddr/maskaddr where ipaddr is the IP address
		     and maskaddr is the netmask in dotted decimal notation for IPv4, or  similar
		     for  IPv6, e.g. ffff:ffff:ffff:ffff:: instead of /64. All IP addresses which
		     match the masked IP address will be allowed in.

	      o      a hostname. The hostname as determined by a reverse lookup will  be  matched
		     (case insensitive) against the pattern. Only an exact match is allowed in.

	      o      a	hostname  pattern using wildcards. These are matched using the same rules
		     as normal unix filename matching. If the pattern matches then the client  is
		     allowed in.

	      Note IPv6 link-local addresses can have a scope in the address specification:


	      You  can also combine "hosts allow" with a separate "hosts deny" parameter. If both
	      parameters are specified then the "hosts allow" parameter is checked  first  and	a
	      match  results  in  the client being able to connect. The "hosts deny" parameter is
	      then checked and a match means that the host is rejected.  If  the  host	does  not
	      match  either  the "hosts allow" or the "hosts deny" patterns then it is allowed to

	      The default is no "hosts allow" parameter, which means all hosts can connect.

       hosts deny
	      This parameter allows you to specify a list of patterns that are matched against	a
	      connecting clients hostname and IP address. If the pattern matches then the connec-
	      tion is rejected. See the "hosts allow" parameter for more information.

	      The default is no "hosts deny" parameter, which means all hosts can connect.

       ignore errors
	      This parameter tells rsyncd to ignore  I/O  errors  on  the  daemon  when  deciding
	      whether  to run the delete phase of the transfer. Normally rsync skips the --delete
	      step if any I/O errors have occurred in order to prevent disastrous deletion due to
	      a  temporary  resource  shortage	or  other  I/O	error. In some cases this test is
	      counter productive so you can use this parameter to turn off this behavior.

       ignore nonreadable
	      This tells the rsync daemon to completely ignore files that are not readable by the
	      user.  This  is  useful  for  public archives that may have some non-readable files
	      among the directories, and the sysadmin doesn't want those files to be seen at all.

       transfer logging
	      This parameter enables per-file logging of downloads and uploads in a format  some-
	      what  similar  to that used by ftp daemons.  The daemon always logs the transfer at
	      the end, so if a transfer is aborted, no mention will be made in the log file.

	      If you want to customize the log lines, see the "log format" parameter.

       log format
	      This parameter allows you to specify the format used  for  logging  file	transfers
	      when  transfer logging is enabled.  The format is a text string containing embedded
	      single-character escape sequences  prefixed  with  a  percent  (%)  character.   An
	      optional	numeric  field	width  may  also be specified between the percent and the
	      escape letter (e.g. "%-50n %8l %07p").

	      The default log format is "%o %h [%a] %m (%u) %f %l", and a "%t [%p]  "  is  always
	      prefixed	when  using the "log file" parameter.  (A perl script that will summarize
	      this default log format is included in the rsync source code  distribution  in  the
	      "support" subdirectory: rsyncstats.)

	      The single-character escapes that are understood are as follows:

	      o      %a the remote IP address

	      o      %b the number of bytes actually transferred

	      o      %B the permission bits of the file (e.g. rwxrwxrwt)

	      o      %c  the  total size of the block checksums received for the basis file (only
		     when sending)

	      o      %f the filename (long form on sender; no trailing "/")

	      o      %G the gid of the file (decimal) or "DEFAULT"

	      o      %h the remote host name

	      o      %i an itemized list of what is being updated

	      o      %l the length of the file in bytes

	      o      %L the string " -> SYMLINK",  "  =>  HARDLINK",  or  ""  (where  SYMLINK  or
		     HARDLINK is a filename)

	      o      %m the module name

	      o      %M the last-modified time of the file

	      o      %n the filename (short form; trailing "/" on dir)

	      o      %o  the  operation,  which is "send", "recv", or "del." (the latter includes
		     the trailing period)

	      o      %p the process ID of this rsync session

	      o      %P the module path

	      o      %t the current date time

	      o      %u the authenticated username or an empty string

	      o      %U the uid of the file (decimal)

	      For a list of what the characters mean that are output by  "%i",	see  the  --item-
	      ize-changes option in the rsync manpage.

	      Note that some of the logged output changes when talking with older rsync versions.
	      For instance, deleted files were only output as verbose  messages  prior	to  rsync

	      This  parameter  allows you to override the clients choice for I/O timeout for this
	      module. Using this parameter you can ensure that rsync won't wait on a dead  client
	      forever.	The timeout is specified in seconds. A value of zero means no timeout and
	      is the default. A good choice for anonymous rsync daemons may be 600 (giving  a  10
	      minute timeout).

       refuse options
	      This  parameter  allows you to specify a space-separated list of rsync command line
	      options that will be refused by your rsync daemon.  You may specify the full option
	      name,  its  one-letter  abbreviation,  or  a wild-card string that matches multiple
	      options.	For example, this would refuse --checksum (-c) and all the various delete

		  refuse options = c delete

	      The reason the above refuses all delete options is that the options imply --delete,
	      and implied options are refused just  like  explicit  options.   As  an  additional
	      safety  feature,	the refusal of "delete" also refuses remove-source-files when the
	      daemon is the sender; if you want the latter without  the  former,  instead  refuse
	      "delete-*"   --	that   refuses	 all   the   delete   modes   without	affecting

	      When an option is refused, the daemon prints an error message and exits.	 To  pre-
	      vent  all  compression  when  serving  files,  you can use "dont compress = *" (see
	      below) instead of "refuse options = compress" to avoid  returning  an  error  to	a
	      client that requests compression.

       dont compress
	      This  parameter  allows  you  to	select	filenames based on wildcard patterns that
	      should not be compressed when pulling files from the daemon (no analogous parameter
	      exists  to  govern  the pushing of files to a daemon).  Compression is expensive in
	      terms of CPU usage, so it is usually good to not try to compress files  that  won't
	      compress well, such as already compressed files.

	      The  "dont  compress"  parameter	takes  a space-separated list of case-insensitive
	      wildcard patterns. Any source filename matching one of the  patterns  will  not  be
	      compressed during transfer.

	      See the --skip-compress parameter in the rsync(1) manpage for the list of file suf-
	      fixes that are not compressed by default.  Specifying a value for  the  "dont  com-
	      press" parameter changes the default when the daemon is the sender.

       pre-xfer exec, post-xfer exec
	      You  may	specify  a  command  to  be run before and/or after the transfer.  If the
	      pre-xfer exec command fails, the transfer is aborted before it begins.

	      The following environment variables will be set, though some are	specific  to  the
	      pre-xfer or the post-xfer environment:

	      o      RSYNC_MODULE_NAME: The name of the module being accessed.

	      o      RSYNC_MODULE_PATH: The path configured for the module.

	      o      RSYNC_HOST_ADDR: The accessing host's IP address.

	      o      RSYNC_HOST_NAME: The accessing host's name.

	      o      RSYNC_USER_NAME: The accessing user's name (empty if no user).

	      o      RSYNC_PID: A unique number for this transfer.

	      o      RSYNC_REQUEST:  (pre-xfer	only)  The module/path info specified by the user
		     (note that the user can specify multiple source files, so the request can be
		     something like "mod/path1 mod/path2", etc.).

	      o      RSYNC_ARG#:  (pre-xfer only) The pre-request arguments are set in these num-
		     bered values. RSYNC_ARG0 is always "rsyncd", and the last value  contains	a
		     single period.

	      o      RSYNC_EXIT_STATUS: (post-xfer only) the server side's exit value.	This will
		     be 0 for a successful run, a positive value for an  error	that  the  server
		     generated,  or  a	-1  if rsync failed to exit properly.  Note that an error
		     that occurs on the client side does not currently get  sent  to  the  server
		     side, so this is not the final exit status for the whole transfer.

	      o      RSYNC_RAW_STATUS: (post-xfer only) the raw exit value from waitpid() .

	      Even  though  the commands can be associated with a particular module, they are run
	      using the permissions of the user that started the daemon (not the module's uid/gid
	      setting) without any chroot restrictions.

       The  authentication  protocol used in rsync is a 128 bit MD4 based challenge response sys-
       tem. This is fairly weak protection, though (with at least  one	brute-force  hash-finding
       algorithm  publicly  available), so if you want really top-quality security, then I recom-
       mend that you run rsync over ssh.  (Yes, a future version of rsync will switch over  to	a
       stronger hashing method.)

       Also  note that the rsync daemon protocol does not currently provide any encryption of the
       data that is transferred over the connection. Only authentication is provided. Use ssh  as
       the transport if you want encryption.

       Future  versions  of  rsync  may support SSL for better authentication and encryption, but
       that is still being investigated.

       A simple rsyncd.conf file that allow anonymous rsync to a ftp area at /home/ftp would be:

	       path = /home/ftp
	       comment = ftp export area

       A more sophisticated example would be:

       uid = nobody
       gid = nobody
       use chroot = yes
       max connections = 4
       syslog facility = local5
       pid file = /var/run/rsyncd.pid

	       path = /var/ftp/./pub
	       comment = whole ftp area (approx 6.1 GB)

	       path = /var/ftp/./pub/samba
	       comment = Samba ftp area (approx 300 MB)

	       path = /var/ftp/./pub/rsync
	       comment = rsync ftp area (approx 6 MB)

	       path = /public_html/samba
	       comment = Samba WWW pages (approx 240 MB)

	       path = /data/cvs
	       comment = CVS repository (requires authentication)
	       auth users = tridge, susan
	       secrets file = /etc/rsyncd.secrets

       The /etc/rsyncd.secrets file would look something like this:


       /etc/rsyncd.conf or rsyncd.conf


       Please report bugs! The rsync bug tracking system is online at http://rsync.samba.org/

       This man page is current for version 3.0.8 of rsync.

       rsync is distributed under the GNU public license.  See the file COPYING for details.

       The primary ftp site for rsync is ftp://rsync.samba.org/pub/rsync.

       A WEB site is available at http://rsync.samba.org/

       We would be delighted to hear from you if you like this program.

       This program uses the zlib compression library written by Jean-loup Gailly and Mark Adler.

       Thanks to Warren Stanley for his original idea and patch for the rsync daemon.  Thanks  to
       Karsten Thygesen for his many suggestions and documentation!

       rsync  was written by Andrew Tridgell and Paul Mackerras.  Many people have later contrib-
       uted to it.

       Mailing lists for support and development are available at http://lists.samba.org

					   26 Mar 2011				   rsyncd.conf(5)

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