man/orig/smb.conf
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SMB.CONF(5) File Formats and Conventions SMB.CONF(5)
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[править] NAME
smb.conf - The configuration file for the Samba suite
[править] SYNOPSIS
The smb.conf file is a configuration file for the Samba suite.
smb.conf contains runtime configuration information for the Samba
programs. The smb.conf file is designed to be configured and
administered by the swat(8) program. The complete description of the
file format and possible parameters held within are here for reference
purposes.
[править] FILE FORMAT
The file consists of sections and parameters. A section begins with the
name of the section in square brackets and continues until the next
section begins. Sections contain parameters of the form:
name = value
The file is line-based - that is, each newline-terminated line
represents either a comment, a section name or a parameter.
Section and parameter names are not case sensitive.
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 section 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 semicolon (";") or a hash ("#") character is
ignored, as are lines containing only whitespace.
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,
1/0 or true/false. Case is not significant in boolean values, but is
preserved in string values. Some items such as create masks are
numeric.
[править] SECTION DESCRIPTIONS
Each section in the configuration file (except for the [global]
section) describes a shared resource (known as a "share"). The section
name is the name of the shared resource and the parameters within the
section define the shares attributes.
There are three special sections, [global], [homes] and [printers],
which are described under special sections. The following notes apply
to ordinary section descriptions.
A share consists of a directory to which access is being given plus a
description of the access rights which are granted to the user of the
service. Some housekeeping options are also specifiable.
Sections are either file share services (used by the client as an
extension of their native file systems) or printable services (used by
the client to access print services on the host running the server).
Sections may be designated guest services, in which case no password is
required to access them. A specified UNIX guest account is used to
define access privileges in this case.
Sections other than guest services will require a password to access
them. The client provides the username. As older clients only provide
passwords and not usernames, you may specify a list of usernames to
check against the password using the user = option in the share
definition. For modern clients such as Windows 95/98/ME/NT/2000, this
should not be necessary.
The access rights granted by the server are masked by the access rights
granted to the specified or guest UNIX user by the host system. The
server does not grant more access than the host system grants.
The following sample section defines a file space share. The user has
write access to the path /home/bar. The share is accessed via the share
name foo:
[foo]
path = /home/bar
read only = no
The following sample section defines a printable share. The share is
read-only, but printable. That is, the only write access permitted is
via calls to open, write to and close a spool file. The guest ok
parameter means access will be permitted as the default guest user
(specified elsewhere):
[aprinter]
path = /usr/spool/public
read only = yes
printable = yes
guest ok = yes
[править] SPECIAL SECTIONS
The [global] section
Parameters in this section apply to the server as a whole, or are
defaults for sections that do not specifically define certain items.
See the notes under PARAMETERS for more information.
The [homes] section
If a section called [homes] is included in the configuration file,
services connecting clients to their home directories can be created on
the fly by the server.
When the connection request is made, the existing sections are scanned.
If a match is found, it is used. If no match is found, the requested
section name is treated as a username and looked up in the local
password file. If the name exists and the correct password has been
given, a share is created by cloning the [homes] section.
Some modifications are then made to the newly created share:
o The share name is changed from homes to the located username.
o If no path was given, the path is set to the user's home directory.
If you decide to use a path = line in your [homes] section, it may be
useful to use the %S macro. For example:
path = /data/pchome/%S
is useful if you have different home directories for your PCs than for
UNIX access.
This is a fast and simple way to give a large number of clients access
to their home directories with a minimum of fuss.
A similar process occurs if the requested section name is "homes",
except that the share name is not changed to that of the requesting
user. This method of using the [homes] section works well if different
users share a client PC.
The [homes] section can specify all the parameters a normal service
section can specify, though some make more sense than others. The
following is a typical and suitable [homes] section:
[homes]
read only = no
An important point is that if guest access is specified in the [homes]
section, all home directories will be visible to all clients without a
password. In the very unlikely event that this is actually desirable,
it is wise to also specify read only access.
The browseable flag for auto home directories will be inherited from
the global browseable flag, not the [homes] browseable flag. This is
useful as it means setting browseable = no in the [homes] section will
hide the [homes] share but make any auto home directories visible.
The [printers] section
This section works like [homes], but for printers.
If a [printers] section occurs in the configuration file, users are
able to connect to any printer specified in the local host's printcap
file.
When a connection request is made, the existing sections are scanned.
If a match is found, it is used. If no match is found, but a [homes]
section exists, it is used as described above. Otherwise, the requested
section name is treated as a printer name and the appropriate printcap
file is scanned to see if the requested section name is a valid printer
share name. If a match is found, a new printer share is created by
cloning the [printers] section.
A few modifications are then made to the newly created share:
o The share name is set to the located printer name
o If no printer name was given, the printer name is set to the
located printer name
o If the share does not permit guest access and no username was
given, the username is set to the located printer name.
The [printers] service MUST be printable - if you specify otherwise,
the server will refuse to load the configuration file.
Typically the path specified is that of a world-writeable spool
directory with the sticky bit set on it. A typical [printers] entry
looks like this:
[printers]
path = /usr/spool/public
guest ok = yes
printable = yes
All aliases given for a printer in the printcap file are legitimate
printer names as far as the server is concerned. If your printing
subsystem doesn't work like that, you will have to set up a
pseudo-printcap. This is a file consisting of one or more lines like
this:
alias|alias|alias|alias...
Each alias should be an acceptable printer name for your printing
subsystem. In the [global] section, specify the new file as your
printcap. The server will only recognize names found in your
pseudo-printcap, which of course can contain whatever aliases you like.
The same technique could be used simply to limit access to a subset of
your local printers.
An alias, by the way, is defined as any component of the first entry of
a printcap record. Records are separated by newlines, components (if
there are more than one) are separated by vertical bar symbols (|).
Note
On SYSV systems which use lpstat to determine what printers are
defined on the system you may be able to use printcap name = lpstat
to automatically obtain a list of printers. See the printcap name
option for more details.
[править] USERSHARES
Starting with Samba version 3.0.23 the capability for non-root users to
add, modify, and delete their own share definitions has been added.
This capability is called usershares and is controlled by a set of
parameters in the [global] section of the smb.conf. The relevant
parameters are :
usershare allow guests
Controls if usershares can permit guest access.
usershare max shares
Maximum number of user defined shares allowed.
usershare owner only
If set only directories owned by the sharing user can be shared.
usershare path
Points to the directory containing the user defined share
definitions. The filesystem permissions on this directory control
who can create user defined shares.
usershare prefix allow list
Comma-separated list of absolute pathnames restricting what
directories can be shared. Only directories below the pathnames in
this list are permitted.
usershare prefix deny list
Comma-separated list of absolute pathnames restricting what
directories can be shared. Directories below the pathnames in this
list are prohibited.
usershare template share
Names a pre-existing share used as a template for creating new
usershares. All other share parameters not specified in the user
defined share definition are copied from this named share.
To allow members of the UNIX group foo to create user defined shares,
create the directory to contain the share definitions as follows:
Become root:
mkdir /usr/local/samba/lib/usershares
chgrp foo /usr/local/samba/lib/usershares
chmod 1770 /usr/local/samba/lib/usershares
Then add the parameters
usershare path = /usr/local/samba/lib/usershares
usershare max shares = 10 # (or the desired number of shares)
to the global section of your smb.conf. Members of the group foo may
then manipulate the user defined shares using the following commands.
net usershare add sharename path [comment] [acl] [guest_ok=[y|n]]
To create or modify (overwrite) a user defined share.
net usershare delete sharename
To delete a user defined share.
net usershare list wildcard-sharename
To list user defined shares.
net usershare info wildcard-sharename
To print information about user defined shares.
[править] PARAMETERS
Parameters define the specific attributes of sections.
Some parameters are specific to the [global] section (e.g., security).
Some parameters are usable in all sections (e.g., create mask). All
others are permissible only in normal sections. For the purposes of the
following descriptions the [homes] and [printers] sections will be
considered normal. The letter G in parentheses indicates that a
parameter is specific to the [global] section. The letter S indicates
that a parameter can be specified in a service specific section. All S
parameters can also be specified in the [global] section - in which
case they will define the default behavior for all services.
Parameters are arranged here in alphabetical order - this may not
create best bedfellows, but at least you can find them! Where there are
synonyms, the preferred synonym is described, others refer to the
preferred synonym.
[править] VARIABLE SUBSTITUTIONS
Many of the strings that are settable in the config file can take
substitutions. For example the option "path = /tmp/%u" is interpreted
as "path = /tmp/john" if the user connected with the username john.
These substitutions are mostly noted in the descriptions below, but
there are some general substitutions which apply whenever they might be
relevant. These are:
%U
session username (the username that the client wanted, not
necessarily the same as the one they got).
%G
primary group name of %U.
%h
the Internet hostname that Samba is running on.
%m
the NetBIOS name of the client machine (very useful).
This parameter is not available when Samba listens on port 445, as
clients no longer send this information. If you use this macro in
an include statement on a domain that has a Samba domain controller
be sure to set in the [global] section smb ports = 139. This will
cause Samba to not listen on port 445 and will permit include
functionality to function as it did with Samba 2.x.
%L
the NetBIOS name of the server. This allows you to change your
config based on what the client calls you. Your server can have a
"dual personality".
%M
the Internet name of the client machine.
%R
the selected protocol level after protocol negotiation. It can be
one of CORE, COREPLUS, LANMAN1, LANMAN2 or NT1.
%d
the process id of the current server process.
%a
The architecture of the remote machine. It currently recognizes
Samba (Samba), the Linux CIFS file system (CIFSFS), OS/2, (OS2),
Mac OS X (OSX), Windows for Workgroups (WfWg), Windows 9x/ME
(Win95), Windows NT (WinNT), Windows 2000 (Win2K), Windows XP
(WinXP), Windows XP 64-bit(WinXP64), Windows 2003 including 2003R2
(Win2K3), and Windows Vista (Vista). Anything else will be known as
UNKNOWN.
%I
the IP address of the client machine.
Before 3.6.0 it could contain IPv4 mapped IPv6 addresses, now it
only contains IPv4 or IPv6 addresses.
%i
the local IP address to which a client connected.
Before 3.6.0 it could contain IPv4 mapped IPv6 addresses, now it
only contains IPv4 or IPv6 addresses.
%T
the current date and time.
%D
name of the domain or workgroup of the current user.
%w
the winbind separator.
%$(envvar)
the value of the environment variable envar.
The following substitutes apply only to some configuration options
(only those that are used when a connection has been established):
%S
the name of the current service, if any.
%P
the root directory of the current service, if any.
%u
username of the current service, if any.
%g
primary group name of %u.
%H
the home directory of the user given by %u.
%N
the name of your NIS home directory server. This is obtained from
your NIS auto.map entry. If you have not compiled Samba with the
--with-automount option, this value will be the same as %L.
%p
the path of the service's home directory, obtained from your NIS
auto.map entry. The NIS auto.map entry is split up as %N:%p.
There are some quite creative things that can be done with these
substitutions and other smb.conf options.
[править] NAME MANGLING
Samba supports name mangling so that DOS and Windows clients can use
files that don't conform to the 8.3 format. It can also be set to
adjust the case of 8.3 format filenames.
There are several options that control the way mangling is performed,
and they are grouped here rather than listed separately. For the
defaults look at the output of the testparm program.
These options can be set separately for each service.
The options are:
case sensitive = yes/no/auto
controls whether filenames are case sensitive. If they aren't,
Samba must do a filename search and match on passed names. The
default setting of auto allows clients that support case sensitive
filenames (Linux CIFSVFS and smbclient 3.0.5 and above currently)
to tell the Samba server on a per-packet basis that they wish to
access the file system in a case-sensitive manner (to support UNIX
case sensitive semantics). No Windows or DOS system supports
case-sensitive filename so setting this option to auto is that same
as setting it to no for them. Default auto.
default case = upper/lower
controls what the default case is for new filenames (ie. files that
don't currently exist in the filesystem). Default lower. IMPORTANT
NOTE: As part of the optimizations for directories containing large
numbers of files, the following special case applies. If the
options case sensitive = yes, preserve case = No, and short
preserve case = No are set, then the case of all incoming client
filenames, not just new filenames, will be modified. See additional
notes below.
preserve case = yes/no
controls whether new files (ie. files that don't currently exist in
the filesystem) are created with the case that the client passes,
or if they are forced to be the default case. Default yes.
short preserve case = yes/no
controls if new files (ie. files that don't currently exist in the
filesystem) which conform to 8.3 syntax, that is all in upper case
and of suitable length, are created upper case, or if they are
forced to be the default case. This option can be used with
preserve case = yes to permit long filenames to retain their case,
while short names are lowercased. Default yes.
By default, Samba 3.0 has the same semantics as a Windows NT server, in
that it is case insensitive but case preserving. As a special case for
directories with large numbers of files, if the case options are set as
follows, "case sensitive = yes", "case preserve = no", "short preserve
case = no" then the "default case" option will be applied and will
modify all filenames sent from the client when accessing this share.
[править] NOTE ABOUT USERNAME/PASSWORD VALIDATION
There are a number of ways in which a user can connect to a service.
The server uses the following steps in determining if it will allow a
connection to a specified service. If all the steps fail, the
connection request is rejected. However, if one of the steps succeeds,
the following steps are not checked.
If the service is marked "guest only = yes" and the server is running
with share-level security ("security = share", steps 1 to 5 are
skipped.
1. If the client has passed a username/password pair and that
username/password pair is validated by the UNIX system's password
programs, the connection is made as that username. This includes
the \\server\service%username method of passing a username.
2. If the client has previously registered a username with the system
and now supplies a correct password for that username, the
connection is allowed.
3. The client's NetBIOS name and any previously used usernames are
checked against the supplied password. If they match, the
connection is allowed as the corresponding user.
4. If the client has previously validated a username/password pair
with the server and the client has passed the validation token,
that username is used.
5. If a user = field is given in the smb.conf file for the service and
the client has supplied a password, and that password matches
(according to the UNIX system's password checking) with one of the
usernames from the user = field, the connection is made as the
username in the user = line. If one of the usernames in the user =
list begins with a @, that name expands to a list of names in the
group of the same name.
6. If the service is a guest service, a connection is made as the
username given in the guest account = for the service, irrespective
of the supplied password.
[править] REGISTRY-BASED CONFIGURATION
Starting with Samba version 3.2.0, the capability to store Samba
configuration in the registry is available. The configuration is stored
in the registry key HKLM\Software\Samba\smbconf. There are two levels
of registry configuration:
1. Share definitions stored in registry are used. This is triggered by
setting the global parameter registry shares to "yes" in smb.conf.
The registry shares are loaded not at startup but on demand at
runtime by smbd. Shares defined in smb.conf take priority over
shares of the same name defined in registry.
2. Global smb.conf options stored in registry are used. This can be
activated in two different ways:
Firstly, a registry only configuration is triggered by setting
config backend = registry in the [global] section of smb.conf. This
resets everything that has been read from config files to this
point and reads the content of the global configuration section
from the registry. This is the recommended method of using registry
based configuration.
Secondly, a mixed configuration can be activated by a special new
meaning of the parameter include = registry in the [global] section
of smb.conf. This reads the global options from registry with the
same priorities as for an include of a text file. This may be
especially useful in cases where an initial configuration is needed
to access the registry.
Activation of global registry options automatically activates
registry shares. So in the registry only case, shares are loaded on
demand only.
Note: To make registry-based configurations foolproof at least to a
certain extent, the use of lock directory and config backend inside the
registry configuration has been disabled: Especially by changing the
lock directory inside the registry configuration, one would create a
broken setup where the daemons do not see the configuration they loaded
once it is active.
The registry configuration can be accessed with tools like regedit or
net (rpc) registry in the key HKLM\Software\Samba\smbconf. More
conveniently, the conf subcommand of the net(8) utility offers a
dedicated interface to read and write the registry based configuration
locally, i.e. directly accessing the database file, circumventing the
server.
[править] EXPLANATION OF EACH PARAMETER
abort shutdown script (G)
This a full path name to a script called by smbd(8) that should
stop a shutdown procedure issued by the shutdown script.
If the connected user posseses the SeRemoteShutdownPrivilege,
right, this command will be run as root.
Default: abort shutdown script = ""
Example: abort shutdown script = /sbin/shutdown -c
access based share enum (S)
If this parameter is yes for a service, then the share hosted by
the service will only be visible to users who have read or write
access to the share during share enumeration (for example net view
\\sambaserver). This has parallels to access based enumeration, the
main difference being that only share permissions are evaluated,
and security descriptors on files contained on the share are not
used in computing enumeration access rights.
Default: access based share enum = no
acl check permissions (S)
This boolean parameter controls what smbd(8)does on receiving a
protocol request of "open for delete" from a Windows client. If a
Windows client doesn't have permissions to delete a file then they
expect this to be denied at open time. POSIX systems normally only
detect restrictions on delete by actually attempting to delete the
file or directory. As Windows clients can (and do) "back out" a
delete request by unsetting the "delete on close" bit Samba cannot
delete the file immediately on "open for delete" request as we
cannot restore such a deleted file. With this parameter set to true
(the default) then smbd checks the file system permissions directly
on "open for delete" and denies the request without actually
deleting the file if the file system permissions would seem to deny
it. This is not perfect, as it's possible a user could have deleted
a file without Samba being able to check the permissions correctly,
but it is close enough to Windows semantics for mostly correct
behaviour. Samba will correctly check POSIX ACL semantics in this
case.
If this parameter is set to "false" Samba doesn't check permissions
on "open for delete" and allows the open. If the user doesn't have
permission to delete the file this will only be discovered at close
time, which is too late for the Windows user tools to display an
error message to the user. The symptom of this is files that appear
to have been deleted "magically" re-appearing on a Windows explorer
refresh. This is an extremely advanced protocol option which should
not need to be changed. This parameter was introduced in its final
form in 3.0.21, an earlier version with slightly different
semantics was introduced in 3.0.20. That older version is not
documented here.
Default: acl check permissions = True
acl compatibility (G)
This parameter specifies what OS ACL semantics should be compatible
with. Possible values are winnt for Windows NT 4, win2k for Windows
2000 and above and auto. If you specify auto, the value for this
parameter will be based upon the version of the client. There
should be no reason to change this parameter from the default.
Default: acl compatibility = Auto
Example: acl compatibility = win2k
acl group control (S)
In a POSIX filesystem, only the owner of a file or directory and
the superuser can modify the permissions and ACLs on a file. If
this parameter is set, then Samba overrides this restriction, and
also allows the primary group owner of a file or directory to
modify the permissions and ACLs on that file.
On a Windows server, groups may be the owner of a file or directory
- thus allowing anyone in that group to modify the permissions on
it. This allows the delegation of security controls on a point in
the filesystem to the group owner of a directory and anything below
it also owned by that group. This means there are multiple people
with permissions to modify ACLs on a file or directory, easing
managability.
This parameter allows Samba to also permit delegation of the
control over a point in the exported directory hierarchy in much
the same way as Windows. This allows all members of a UNIX group to
control the permissions on a file or directory they have group
ownership on.
This parameter is best used with the inherit owner option and also
on on a share containing directories with the UNIX setgid bit set
on them, which causes new files and directories created within it
to inherit the group ownership from the containing directory.
This is parameter has been was deprecated in Samba 3.0.23, but
re-activated in Samba 3.0.31 and above, as it now only controls
permission changes if the user is in the owning primary group. It
is now no longer equivalent to the dos filemode option.
Default: acl group control = no
acl map full control (S)
This boolean parameter controls whether smbd(8) maps a POSIX ACE
entry of "rwx" (read/write/execute), the maximum allowed POSIX
permission set, into a Windows ACL of "FULL CONTROL". If this
parameter is set to true any POSIX ACE entry of "rwx" will be
returned in a Windows ACL as "FULL CONTROL", is this parameter is
set to false any POSIX ACE entry of "rwx" will be returned as the
specific Windows ACL bits representing read, write and execute.
Default: acl map full control = True
add group script (G)
This is the full pathname to a script that will be run AS ROOT by
smbd(8) when a new group is requested. It will expand any %g to the
group name passed. This script is only useful for installations
using the Windows NT domain administration tools. The script is
free to create a group with an arbitrary name to circumvent unix
group name restrictions. In that case the script must print the
numeric gid of the created group on stdout.
Default: add group script =
Example: add group script = /usr/sbin/groupadd %g
add machine script (G)
This is the full pathname to a script that will be run by smbd(8)
when a machine is added to Samba's domain and a Unix account
matching the machine's name appended with a "$" does not already
exist.
This option is very similar to the add user script, and likewise
uses the %u substitution for the account name. Do not use the %m
substitution.
Default: add machine script =
Example: add machine script = /usr/sbin/adduser -n -g machines -c
Machine -d /var/lib/nobody -s /bin/false %u
add port command (G)
Samba 3.0.23 introduced support for adding printer ports remotely
using the Windows "Add Standard TCP/IP Port Wizard". This option
defines an external program to be executed when smbd receives a
request to add a new Port to the system. The script is passed two
parameters:
o port name
o device URI
The deviceURI is in the format of socket://<hostname>[:<portnumber>] or
lpd://<hostname>/<queuename>.
Default: add port command =
Example: add port command = /etc/samba/scripts/addport.sh
addprinter command (G)
With the introduction of MS-RPC based printing support for Windows
NT/2000 clients in Samba 2.2, The MS Add Printer Wizard (APW) icon
is now also available in the "Printers..." folder displayed a share
listing. The APW allows for printers to be add remotely to a Samba
or Windows NT/2000 print server.
For a Samba host this means that the printer must be physically
added to the underlying printing system. The addprinter command
defines a script to be run which will perform the necessary
operations for adding the printer to the print system and to add
the appropriate service definition to the smb.conf file in order
that it can be shared by smbd(8).
The addprinter command is automatically invoked with the following
parameter (in order):
o printer name
o share name
o port name
o driver name
o location
o Windows 9x driver location
All parameters are filled in from the PRINTER_INFO_2 structure sent by
the Windows NT/2000 client with one exception. The "Windows 9x driver
location" parameter is included for backwards compatibility only. The
remaining fields in the structure are generated from answers to the APW
questions.
Once the addprinter command has been executed, smbd will reparse the
smb.conf to determine if the share defined by the APW exists. If the
sharename is still invalid, then smbd will return an ACCESS_DENIED
error to the client.
The addprinter command program can output a single line of text, which
Samba will set as the port the new printer is connected to. If this
line isn't output, Samba won't reload its printer shares.
Default: addprinter command =
Example: addprinter command = /usr/bin/addprinter
add share command (G)
Samba 2.2.0 introduced the ability to dynamically add and delete
shares via the Windows NT 4.0 Server Manager. The add share command
is used to define an external program or script which will add a
new service definition to smb.conf.
In order to successfully execute the add share command, smbd
requires that the administrator connects using a root account (i.e.
uid == 0) or has the SeDiskOperatorPrivilege. Scripts defined in
the add share command parameter are executed as root.
When executed, smbd will automatically invoke the add share command
with five parameters.
o configFile - the location of the global smb.conf file.
o shareName - the name of the new share.
o pathName - path to an **existing** directory on disk.
o comment - comment string to associate with the new share.
o max connections Number of maximum simultaneous connections to
this share.
This parameter is only used to add file shares. To add printer shares,
see the addprinter command.
Default: add share command =
Example: add share command = /usr/local/bin/addshare
add user script (G)
This is the full pathname to a script that will be run AS ROOT by
smbd(8) under special circumstances described below.
Normally, a Samba server requires that UNIX users are created for
all users accessing files on this server. For sites that use
Windows NT account databases as their primary user database
creating these users and keeping the user list in sync with the
Windows NT PDC is an onerous task. This option allows smbd to
create the required UNIX users ON DEMAND when a user accesses the
Samba server.
In order to use this option, smbd(8) must NOT be set to security =
share and add user script must be set to a full pathname for a
script that will create a UNIX user given one argument of %u, which
expands into the UNIX user name to create.
When the Windows user attempts to access the Samba server, at login
(session setup in the SMB protocol) time, smbd(8) contacts the
password server and attempts to authenticate the given user with
the given password. If the authentication succeeds then smbd
attempts to find a UNIX user in the UNIX password database to map
the Windows user into. If this lookup fails, and add user script is
set then smbd will call the specified script AS ROOT, expanding any
%u argument to be the user name to create.
If this script successfully creates the user then smbd will
continue on as though the UNIX user already existed. In this way,
UNIX users are dynamically created to match existing Windows NT
accounts.
See also security, password server, delete user script.
Default: add user script =
Example: add user script = /usr/local/samba/bin/add_user %u
add user to group script (G)
Full path to the script that will be called when a user is added to
a group using the Windows NT domain administration tools. It will
be run by smbd(8) AS ROOT. Any %g will be replaced with the group
name and any %u will be replaced with the user name.
Note that the adduser command used in the example below does not
support the used syntax on all systems.
Default: add user to group script =
Example: add user to group script = /usr/sbin/adduser %u %g
administrative share (S)
If this parameter is set to yes for a share, then the share will be
an administrative share. The Administrative Shares are the default
network shares created by all Windows NT-based operating systems.
These are shares like C$, D$ or ADMIN$. The type of these shares is
STYPE_DISKTREE_HIDDEN.
See the section below on security for more information about this
option.
Default: administrative share = no
admin users (S)
This is a list of users who will be granted administrative
privileges on the share. This means that they will do all file
operations as the super-user (root).
You should use this option very carefully, as any user in this list
will be able to do anything they like on the share, irrespective of
file permissions.
This parameter will not work with the security = share in Samba
3.0. This is by design.
Default: admin users =
Example: admin users = jason
afs share (S)
This parameter controls whether special AFS features are enabled
for this share. If enabled, it assumes that the directory exported
via the path parameter is a local AFS import. The special AFS
features include the attempt to hand-craft an AFS token if you
enabled --with-fake-kaserver in configure.
Default: afs share = no
afs username map (G)
If you are using the fake kaserver AFS feature, you might want to
hand-craft the usernames you are creating tokens for. For example
this is necessary if you have users from several domain in your AFS
Protection Database. One possible scheme to code users as
DOMAIN+User as it is done by winbind with the + as a separator.
The mapped user name must contain the cell name to log into, so
without setting this parameter there will be no token.
Default: afs username map =
Example: afs username map = %u@afs.samba.org
aio read size (S)
If Samba has been built with asynchronous I/O support and this
integer parameter is set to non-zero value, Samba will read from
file asynchronously when size of request is bigger than this value.
Note that it happens only for non-chained and non-chaining reads
and when not using write cache.
Current implementation of asynchronous I/O in Samba 3.0 does
support only up to 10 outstanding asynchronous requests, read and
write combined.
Related command: write cache size
Related command: aio write size
Default: aio read size = 0
Example: aio read size = 16384 # Use asynchronous I/O for reads
bigger than 16KB request size
aio write behind (S)
If Samba has been built with asynchronous I/O support, Samba will
not wait until write requests are finished before returning the
result to the client for files listed in this parameter. Instead,
Samba will immediately return that the write request has been
finished successfully, no matter if the operation will succeed or
not. This might speed up clients without aio support, but is really
dangerous, because data could be lost and files could be damaged.
The syntax is identical to the veto files parameter.
Default: aio write behind =
Example: aio write behind = /*.tmp/
aio write size (S)
If Samba has been built with asynchronous I/O support and this
integer parameter is set to non-zero value, Samba will write to
file asynchronously when size of request is bigger than this value.
Note that it happens only for non-chained and non-chaining reads
and when not using write cache.
Current implementation of asynchronous I/O in Samba 3.0 does
support only up to 10 outstanding asynchronous requests, read and
write combined.
Related command: write cache size
Related command: aio read size
Default: aio write size = 0
Example: aio write size = 16384 # Use asynchronous I/O for writes
bigger than 16KB request size
algorithmic rid base (G)
This determines how Samba will use its algorithmic mapping from
uids/gid to the RIDs needed to construct NT Security Identifiers.
Setting this option to a larger value could be useful to sites
transitioning from WinNT and Win2k, as existing user and group rids
would otherwise clash with sytem users etc.
All UIDs and GIDs must be able to be resolved into SIDs for the
correct operation of ACLs on the server. As such the algorithmic
mapping can't be 'turned off', but pushing it 'out of the way'
should resolve the issues. Users and groups can then be assigned
'low' RIDs in arbitrary-rid supporting backends.
Default: algorithmic rid base = 1000
Example: algorithmic rid base = 100000
allocation roundup size (S)
This parameter allows an administrator to tune the allocation size
reported to Windows clients. The default size of 1Mb generally
results in improved Windows client performance. However, rounding
the allocation size may cause difficulties for some applications,
e.g. MS Visual Studio. If the MS Visual Studio compiler starts to
crash with an internal error, set this parameter to zero for this
share.
The integer parameter specifies the roundup size in bytes.
Default: allocation roundup size = 1048576
Example: allocation roundup size = 0 # (to disable roundups)
allow insecure wide links (G)
In normal operation the option wide links which allows the server
to follow symlinks outside of a share path is automatically
disabled when unix extensions are enabled on a Samba server. This
is done for security purposes to prevent UNIX clients creating
symlinks to areas of the server file system that the administrator
does not wish to export.
Setting allow insecure wide links to true disables the link between
these two parameters, removing this protection and allowing a site
to configure the server to follow symlinks (by setting wide links
to "true") even when unix extensions is turned on.
If is not recommended to enable this option unless you fully
understand the implications of allowing the server to follow
symbolic links created by UNIX clients. For most normal Samba
configurations this would be considered a security hole and setting
this parameter is not recommended.
This option was added at the request of sites who had deliberately
set Samba up in this way and needed to continue supporting this
functionality without having to patch the Samba code.
Default: allow insecure wide links = no
allow trusted domains (G)
This option only takes effect when the security option is set to
server, domain or ads. If it is set to no, then attempts to connect
to a resource from a domain or workgroup other than the one which
smbd is running in will fail, even if that domain is trusted by the
remote server doing the authentication.
This is useful if you only want your Samba server to serve
resources to users in the domain it is a member of. As an example,
suppose that there are two domains DOMA and DOMB. DOMB is trusted
by DOMA, which contains the Samba server. Under normal
circumstances, a user with an account in DOMB can then access the
resources of a UNIX account with the same account name on the Samba
server even if they do not have an account in DOMA. This can make
implementing a security boundary difficult.
Default: allow trusted domains = yes
announce as (G)
This specifies what type of server nmbd(8) will announce itself as,
to a network neighborhood browse list. By default this is set to
Windows NT. The valid options are : "NT Server" (which can also be
written as "NT"), "NT Workstation", "Win95" or "WfW" meaning
Windows NT Server, Windows NT Workstation, Windows 95 and Windows
for Workgroups respectively. Do not change this parameter unless
you have a specific need to stop Samba appearing as an NT server as
this may prevent Samba servers from participating as browser
servers correctly.
Default: announce as = NT Server
Example: announce as = Win95
announce version (G)
This specifies the major and minor version numbers that nmbd will
use when announcing itself as a server. The default is 4.9. Do not
change this parameter unless you have a specific need to set a
Samba server to be a downlevel server.
Default: announce version = 4.9
Example: announce version = 2.0
async smb echo handler (G)
This parameter specifies whether Samba should fork the async smb
echo handler. It can be beneficial if your file system can block
syscalls for a very long time. In some circumstances, it prolongs
the timeout that Windows uses to determine whether a connection is
dead.
Default: async smb echo handler = no
auth methods (G)
This option allows the administrator to chose what authentication
methods smbd will use when authenticating a user. This option
defaults to sensible values based on security. This should be
considered a developer option and used only in rare circumstances.
In the majority (if not all) of production servers, the default
setting should be adequate.
Each entry in the list attempts to authenticate the user in turn,
until the user authenticates. In practice only one method will ever
actually be able to complete the authentication.
Possible options include guest (anonymous access), sam (lookups in
local list of accounts based on netbios name or domain name),
winbind (relay authentication requests for remote users through
winbindd), ntdomain (pre-winbindd method of authentication for
remote domain users; deprecated in favour of winbind method),
trustdomain (authenticate trusted users by contacting the remote DC
directly from smbd; deprecated in favour of winbind method).
Default: auth methods =
Example: auth methods = guest sam winbind
available (S)
This parameter lets you "turn off" a service. If available = no,
then ALL attempts to connect to the service will fail. Such
failures are logged.
Default: available = yes
bind interfaces only (G)
This global parameter allows the Samba admin to limit what
interfaces on a machine will serve SMB requests. It affects file
service smbd(8) and name service nmbd(8) in a slightly different
ways.
For name service it causes nmbd to bind to ports 137 and 138 on the
interfaces listed in the interfaces parameter. nmbd also binds to
the "all addresses" interface (0.0.0.0) on ports 137 and 138 for
the purposes of reading broadcast messages. If this option is not
set then nmbd will service name requests on all of these sockets.
If bind interfaces only is set then nmbd will check the source
address of any packets coming in on the broadcast sockets and
discard any that don't match the broadcast addresses of the
interfaces in the interfaces parameter list. As unicast packets are
received on the other sockets it allows nmbd to refuse to serve
names to machines that send packets that arrive through any
interfaces not listed in the interfaces list. IP Source address
spoofing does defeat this simple check, however, so it must not be
used seriously as a security feature for nmbd.
For file service it causes smbd(8) to bind only to the interface
list given in the interfaces parameter. This restricts the networks
that smbd will serve, to packets coming in on those interfaces.
Note that you should not use this parameter for machines that are
serving PPP or other intermittent or non-broadcast network
interfaces as it will not cope with non-permanent interfaces.
If bind interfaces only is set and the network address 127.0.0.1 is
not added to the interfaces parameter list smbpasswd(8) and swat(8)
may not work as expected due to the reasons covered below.
To change a users SMB password, the smbpasswd by default connects
to the localhost - 127.0.0.1 address as an SMB client to issue the
password change request. If bind interfaces only is set then unless
the network address 127.0.0.1 is added to the interfaces parameter
list then smbpasswd will fail to connect in it's default mode.
smbpasswd can be forced to use the primary IP interface of the
local host by using its smbpasswd(8) -r remote machine parameter,
with remote machine set to the IP name of the primary interface of
the local host.
The swat status page tries to connect with smbd and nmbd at the
address 127.0.0.1 to determine if they are running. Not adding
127.0.0.1 will cause smbd and nmbd to always show "not running"
even if they really are. This can prevent swat from
starting/stopping/restarting smbd and nmbd.
Default: bind interfaces only = no
blocking locks (S)
This parameter controls the behavior of smbd(8) when given a
request by a client to obtain a byte range lock on a region of an
open file, and the request has a time limit associated with it.
If this parameter is set and the lock range requested cannot be
immediately satisfied, samba will internally queue the lock
request, and periodically attempt to obtain the lock until the
timeout period expires.
If this parameter is set to no, then samba will behave as previous
versions of Samba would and will fail the lock request immediately
if the lock range cannot be obtained.
Default: blocking locks = yes
block size (S)
This parameter controls the behavior of smbd(8) when reporting disk
free sizes. By default, this reports a disk block size of 1024
bytes.
Changing this parameter may have some effect on the efficiency of
client writes, this is not yet confirmed. This parameter was added
to allow advanced administrators to change it (usually to a higher
value) and test the effect it has on client write performance
without re-compiling the code. As this is an experimental option it
may be removed in a future release.
Changing this option does not change the disk free reporting size,
just the block size unit reported to the client.
Default: block size = 1024
Example: block size = 4096
browsable
This parameter is a synonym for browseable.
browseable (S)
This controls whether this share is seen in the list of available
shares in a net view and in the browse list.
Default: browseable = yes
browse list (G)
This controls whether smbd(8) will serve a browse list to a client
doing a NetServerEnum call. Normally set to yes. You should never
need to change this.
Default: browse list = yes
cache directory (G)
Usually, most of the TDB files are stored in the lock directory.
Since Samba 3.4.0, it is possible to differentiate between TDB
files with persistent data and TDB files with non-persistent data
using the state directory and the cache directory options.
This option specifies the directory where TDB files containing
non-persistent data will be stored.
Default: cache directory = ${prefix}/var/locks
Example: cache directory = /var/run/samba/locks/cache
casesignames
This parameter is a synonym for case sensitive.
case sensitive (S)
See the discussion in the section name mangling.
Default: case sensitive = no
change notify (S)
This parameter specifies whether Samba should reply to a client's
file change notify requests.
You should never need to change this parameter
Default: change notify = yes
change share command (G)
Samba 2.2.0 introduced the ability to dynamically add and delete
shares via the Windows NT 4.0 Server Manager. The change share
command is used to define an external program or script which will
modify an existing service definition in smb.conf.
In order to successfully execute the change share command, smbd
requires that the administrator connects using a root account (i.e.
uid == 0) or has the SeDiskOperatorPrivilege. Scripts defined in
the change share command parameter are executed as root.
When executed, smbd will automatically invoke the change share
command with five parameters.
o configFile - the location of the global smb.conf file.
o shareName - the name of the new share.
o pathName - path to an **existing** directory on disk.
o comment - comment string to associate with the new share.
o max connections Number of maximum simultaneous connections to
this share.
This parameter is only used to modify existing file share definitions.
To modify printer shares, use the "Printers..." folder as seen when
browsing the Samba host.
Default: change share command =
Example: change share command = /usr/local/bin/changeshare
check password script (G)
The name of a program that can be used to check password
complexity. The password is sent to the program's standard input.
The program must return 0 on a good password, or any other value if
the password is bad. In case the password is considered weak (the
program does not return 0) the user will be notified and the
password change will fail.
Note: In the example directory is a sample program called
crackcheck that uses cracklib to check the password quality.
Default: check password script = Disabled
Example: check password script = /usr/local/sbin/crackcheck
client lanman auth (G)
This parameter determines whether or not smbclient(8) and other
samba client tools will attempt to authenticate itself to servers
using the weaker LANMAN password hash. If disabled, only server
which support NT password hashes (e.g. Windows NT/2000, Samba,
etc... but not Windows 95/98) will be able to be connected from the
Samba client.
The LANMAN encrypted response is easily broken, due to its
case-insensitive nature, and the choice of algorithm. Clients
without Windows 95/98 servers are advised to disable this option.
Disabling this option will also disable the client plaintext auth
option.
Likewise, if the client ntlmv2 auth parameter is enabled, then only
NTLMv2 logins will be attempted.
Default: client lanman auth = no
client ldap sasl wrapping (G)
The client ldap sasl wrapping defines whether ldap traffic will be
signed or signed and encrypted (sealed). Possible values are plain,
sign and seal.
The values sign and seal are only available if Samba has been
compiled against a modern OpenLDAP version (2.3.x or higher).
This option is needed in the case of Domain Controllers enforcing
the usage of signed LDAP connections (e.g. Windows 2000 SP3 or
higher). LDAP sign and seal can be controlled with the registry key
"HKLM\System\CurrentControlSet\Services\
NTDS\Parameters\LDAPServerIntegrity" on the Windows server side.
Depending on the used KRB5 library (MIT and older Heimdal versions)
it is possible that the message "integrity only" is not supported.
In this case, sign is just an alias for seal.
The default value is plain which is not irritable to KRB5 clock
skew errors. That implies synchronizing the time with the KDC in
the case of using sign or seal.
Default: client ldap sasl wrapping = plain
client ntlmv2 auth (G)
This parameter determines whether or not smbclient(8) will attempt
to authenticate itself to servers using the NTLMv2 encrypted
password response.
If enabled, only an NTLMv2 and LMv2 response (both much more secure
than earlier versions) will be sent. Older servers (including NT4 <
SP4, Win9x and Samba 2.2) are not compatible with NTLMv2 when not
in an NTLMv2 supporting domain
Similarly, if enabled, NTLMv1, client lanman auth and client
plaintext auth authentication will be disabled. This also disables
share-level authentication.
If disabled, an NTLM response (and possibly a LANMAN response) will
be sent by the client, depending on the value of client lanman
auth.
Note that Windows Vista and later versions already use NTLMv2 by
default, and some sites (particularly those following 'best
practice' security polices) only allow NTLMv2 responses, and not
the weaker LM or NTLM.
Default: client ntlmv2 auth = yes
client plaintext auth (G)
Specifies whether a client should send a plaintext password if the
server does not support encrypted passwords.
Default: client plaintext auth = no
client schannel (G)
This controls whether the client offers or even demands the use of
the netlogon schannel. client schannel = no does not offer the
schannel, client schannel = auto offers the schannel but does not
enforce it, and client schannel = yes denies access if the server
is not able to speak netlogon schannel.
Default: client schannel = auto
Example: client schannel = yes
client signing (G)
This controls whether the client is allowed or required to use SMB
signing. Possible values are auto, mandatory and disabled.
When set to auto, SMB signing is offered, but not enforced. When
set to mandatory, SMB signing is required and if set to disabled,
SMB signing is not offered either.
Default: client signing = auto
client use spnego principal (G)
This parameter determines whether or not smbclient(8) and other
samba components acting as a client will attempt to use the
server-supplied principal sometimes given in the SPNEGO exchange.
If enabled, Samba can attempt to use Kerberos to contact servers
known only by IP address. Kerberos relies on names, so ordinarily
cannot function in this situation.
If disabled, Samba will use the name used to look up the server
when asking the KDC for a ticket. This avoids situations where a
server may impersonate another, soliciting authentication as one
principal while being known on the network as another.
Note that Windows XP SP2 and later versions already follow this
behaviour, and Windows Vista and later servers no longer supply
this 'rfc4178 hint' principal on the server side.
Default: client use spnego principal = no
client use spnego (G)
This variable controls whether Samba clients will try to use Simple
and Protected NEGOciation (as specified by rfc2478) with supporting
servers (including WindowsXP, Windows2000 and Samba 3.0) to agree
upon an authentication mechanism. This enables Kerberos
authentication in particular.
Default: client use spnego = yes
cluster addresses (G)
With this parameter you can add additional addresses nmbd will
register with a WINS server. These addresses are not necessarily
present on all nodes simultaneously, but they will be registered
with the WINS server so that clients can contact any of the nodes.
Default: cluster addresses =
Example: cluster addresses = 10.0.0.1 10.0.0.2 10.0.0.3
clustering (G)
This parameter specifies whether Samba should contact ctdb for
accessing its tdb files and use ctdb as a backend for its messaging
backend.
Set this parameter to yes only if you have a cluster setup with
ctdb running.
Default: clustering = no
comment (S)
This is a text field that is seen next to a share when a client
does a queries the server, either via the network neighborhood or
via net view to list what shares are available.
If you want to set the string that is displayed next to the machine
name then see the server string parameter.
Default: comment = # No comment
Example: comment = Fred's Files
config backend (G)
This controls the backend for storing the configuration. Possible
values are file (the default) and registry. When config backend =
registry is encountered while loading smb.conf, the configuration
read so far is dropped and the global options are read from
registry instead. So this triggers a registry only configuration.
Share definitions are not read immediately but instead registry
shares is set to yes.
Note: This option can not be set inside the registry configuration
itself.
Default: config backend = file
Example: config backend = registry
config file (G)
This allows you to override the config file to use, instead of the
default (usually smb.conf). There is a chicken and egg problem here
as this option is set in the config file!
For this reason, if the name of the config file has changed when
the parameters are loaded then it will reload them from the new
config file.
This option takes the usual substitutions, which can be very
useful.
If the config file doesn't exist then it won't be loaded (allowing
you to special case the config files of just a few clients).
No default
Example: config file = /usr/local/samba/lib/smb.conf.%m
copy (S)
This parameter allows you to "clone" service entries. The specified
service is simply duplicated under the current service's name. Any
parameters specified in the current section will override those in
the section being copied.
This feature lets you set up a 'template' service and create
similar services easily. Note that the service being copied must
occur earlier in the configuration file than the service doing the
copying.
Default: copy =
Example: copy = otherservice
create krb5 conf (G)
Setting this paramter to no prevents winbind from creating custom
krb5.conf files. Winbind normally does this because the krb5
libraries are not AD-site-aware and thus would pick any domain
controller out of potentially very many. Winbind is site-aware and
makes the krb5 libraries use a local DC by creating its own
krb5.conf files.
Preventing winbind from doing this might become necessary if you
have to add special options into your system-krb5.conf that winbind
does not see.
Default: create krb5 conf = yes
create mode
This parameter is a synonym for create mask.
create mask (S)
When a file is created, the necessary permissions are calculated
according to the mapping from DOS modes to UNIX permissions, and
the resulting UNIX mode is then bit-wise 'AND'ed with this
parameter. This parameter may be thought of as a bit-wise MASK for
the UNIX modes of a file. Any bit not set here will be removed from
the modes set on a file when it is created.
The default value of this parameter removes the group and other
write and execute bits from the UNIX modes.
Following this Samba will bit-wise 'OR' the UNIX mode created from
this parameter with the value of the force create mode parameter
which is set to 000 by default.
This parameter does not affect directory masks. See the parameter
directory mask for details.
Note that this parameter does not apply to permissions set by
Windows NT/2000 ACL editors. If the administrator wishes to enforce
a mask on access control lists also, they need to set the security
mask.
Default: create mask = 0744
Example: create mask = 0775
csc policy (S)
This stands for client-side caching policy, and specifies how
clients capable of offline caching will cache the files in the
share. The valid values are: manual, documents, programs, disable.
These values correspond to those used on Windows servers.
For example, shares containing roaming profiles can have offline
caching disabled using csc policy = disable.
Default: csc policy = manual
Example: csc policy = programs
ctdbd socket (G)
If you set clustering=yes, you need to tell Samba where ctdbd
listens on its unix domain socket. The default path as of ctdb 1.0
is /tmp/ctdb.socket which you have to explicitly set for Samba in
smb.conf.
Default: ctdbd socket =
Example: ctdbd socket = /tmp/ctdb.socket
ctdb locktime warn threshold (G)
In a cluster environment using Samba and ctdb it is critical that
locks on central ctdb-hosted databases like locking.tdb are not
held for long. With the current Samba architecture it happens that
Samba takes a lock and while holding that lock makes file system
calls into the shared cluster file system. This option makes Samba
warn if it detects that it has held locks for the specified number
of milliseconds. If this happens, smbd will emit a debug level 0
message into its logs and potentially into syslog. The most likely
reason for such a log message is that an operation of the cluster
file system Samba exports is taking longer than expected. The
messages are meant as a debugging aid for potential cluster
problems.
The default value of 0 disables this logging.
Default: ctdb locktime warn threshold = 0
ctdb timeout (G)
This parameter specifies a timeout in seconds for the connection
between Samba and ctdb. It is only valid if you have compiled Samba
with clustering and if you have set clustering=yes.
When something in the cluster blocks, it can happen that we wait
indefinitely long for ctdb, just adding to the blocking condition.
In a well-running cluster this should never happen, but there are
too many components in a cluster that might have hickups. Choosing
the right balance for this value is very tricky, because on a busy
cluster long service times to transfer something across the cluster
might be valid. Setting it too short will degrade the service your
cluster presents, setting it too long might make the cluster itself
not recover from something severely broken for too long.
Be aware that if you set this parameter, this needs to be in the
file smb.conf, it is not really helpful to put this into a registry
configuration (typical on a cluster), because to access the
registry contact to ctdb is requred.
Setting ctdb timeout to n makes any process waiting longer than n
seconds for a reply by the cluster panic. Setting it to 0 (the
default) makes Samba block forever, which is the highly recommended
default.
Default: ctdb timeout = 0
cups connection timeout (G)
This parameter is only applicable if printing is set to cups.
If set, this option specifies the number of seconds that smbd will
wait whilst trying to contact to the CUPS server. The connection
will fail if it takes longer than this number of seconds.
Default: cups connection timeout = 30
Example: cups connection timeout = 60
cups encrypt (G)
This parameter is only applicable if printing is set to cups and if
you use CUPS newer than 1.0.x.It is used to define whether or not
Samba should use encryption when talking to the CUPS server.
Possible values are auto, yes and no
When set to auto we will try to do a TLS handshake on each CUPS
connection setup. If that fails, we will fall back to unencrypted
operation.
Default: cups encrypt = "no"
cups options (S)
This parameter is only applicable if printing is set to cups. Its
value is a free form string of options passed directly to the cups
library.
You can pass any generic print option known to CUPS (as listed in
the CUPS "Software Users' Manual"). You can also pass any printer
specific option (as listed in "lpoptions -d printername -l") valid
for the target queue. Multiple parameters should be space-delimited
name/value pairs according to the PAPI text option ABNF
specification. Collection values ("name={a=... b=... c=...}") are
stored with the curley brackets intact.
You should set this parameter to raw if your CUPS server error_log
file contains messages such as "Unsupported format
'application/octet-stream'" when printing from a Windows client
through Samba. It is no longer necessary to enable system wide raw
printing in /etc/cups/mime.{convs,types}.
Default: cups options = ""
Example: cups options = "raw media=a4"
cups server (G)
This parameter is only applicable if printing is set to cups.
If set, this option overrides the ServerName option in the CUPS
client.conf. This is necessary if you have virtual samba servers
that connect to different CUPS daemons.
Optionally, a port can be specified by separating the server name
and port number with a colon. If no port was specified, the default
port for IPP (631) will be used.
Default: cups server = ""
Example: cups server = mycupsserver
Example: cups server = mycupsserver:1631
deadtime (G)
The value of the parameter (a decimal integer) represents the
number of minutes of inactivity before a connection is considered
dead, and it is disconnected. The deadtime only takes effect if the
number of open files is zero.
This is useful to stop a server's resources being exhausted by a
large number of inactive connections.
Most clients have an auto-reconnect feature when a connection is
broken so in most cases this parameter should be transparent to
users.
Using this parameter with a timeout of a few minutes is recommended
for most systems.
A deadtime of zero indicates that no auto-disconnection should be
performed.
Default: deadtime = 0
Example: deadtime = 15
debug class (G)
With this boolean parameter enabled, the debug class (DBGC_CLASS)
will be displayed in the debug header.
For more information about currently available debug classes, see
section about log level.
Default: debug class = no
debug hires timestamp (G)
Sometimes the timestamps in the log messages are needed with a
resolution of higher that seconds, this boolean parameter adds
microsecond resolution to the timestamp message header when turned
on.
Note that the parameter debug timestamp must be on for this to have
an effect.
Default: debug hires timestamp = yes
debug pid (G)
When using only one log file for more then one forked
smbd(8)-process there may be hard to follow which process outputs
which message. This boolean parameter is adds the process-id to the
timestamp message headers in the logfile when turned on.
Note that the parameter debug timestamp must be on for this to have
an effect.
Default: debug pid = no
debug prefix timestamp (G)
With this option enabled, the timestamp message header is prefixed
to the debug message without the filename and function information
that is included with the debug timestamp parameter. This gives
timestamps to the messages without adding an additional line.
Note that this parameter overrides the debug timestamp parameter.
Default: debug prefix timestamp = no
timestamp logs
This parameter is a synonym for debug timestamp.
debug timestamp (G)
Samba debug log messages are timestamped by default. If you are
running at a high debug level these timestamps can be distracting.
This boolean parameter allows timestamping to be turned off.
Default: debug timestamp = yes
debug uid (G)
Samba is sometimes run as root and sometime run as the connected
user, this boolean parameter inserts the current euid, egid, uid
and gid to the timestamp message headers in the log file if turned
on.
Note that the parameter debug timestamp must be on for this to have
an effect.
Default: debug uid = no
dedicated keytab file (G)
Specifies the path to the kerberos keytab file when kerberos method
is set to "dedicated keytab".
Default: dedicated keytab file =
Example: dedicated keytab file = /usr/local/etc/krb5.keytab
default case (S)
See the section on name mangling. Also note the short preserve case
parameter.
Default: default case = lower
default devmode (S)
This parameter is only applicable to printable services. When smbd
is serving Printer Drivers to Windows NT/2k/XP clients, each
printer on the Samba server has a Device Mode which defines things
such as paper size and orientation and duplex settings. The device
mode can only correctly be generated by the printer driver itself
(which can only be executed on a Win32 platform). Because smbd is
unable to execute the driver code to generate the device mode, the
default behavior is to set this field to NULL.
Most problems with serving printer drivers to Windows NT/2k/XP
clients can be traced to a problem with the generated device mode.
Certain drivers will do things such as crashing the client's
Explorer.exe with a NULL devmode. However, other printer drivers
can cause the client's spooler service (spoolsv.exe) to die if the
devmode was not created by the driver itself (i.e. smbd generates a
default devmode).
This parameter should be used with care and tested with the printer
driver in question. It is better to leave the device mode to NULL
and let the Windows client set the correct values. Because drivers
do not do this all the time, setting default devmode = yes will
instruct smbd to generate a default one.
For more information on Windows NT/2k printing and Device Modes,
see the MSDN documentation.
Default: default devmode = yes
default
This parameter is a synonym for default service.
default service (G)
This parameter specifies the name of a service which will be
connected to if the service actually requested cannot be found.
Note that the square brackets are NOT given in the parameter value
(see example below).
There is no default value for this parameter. If this parameter is
not given, attempting to connect to a nonexistent service results
in an error.
Typically the default service would be a guest ok, read-only
service.
Also note that the apparent service name will be changed to equal
that of the requested service, this is very useful as it allows you
to use macros like %S to make a wildcard service.
Note also that any "_" characters in the name of the service used
in the default service will get mapped to a "/". This allows for
interesting things.
Default: default service =
Example: default service = pub
defer sharing violations (G)
Windows allows specifying how a file will be shared with other
processes when it is opened. Sharing violations occur when a file
is opened by a different process using options that violate the
share settings specified by other processes. This parameter causes
smbd to act as a Windows server does, and defer returning a
"sharing violation" error message for up to one second, allowing
the client to close the file causing the violation in the meantime.
UNIX by default does not have this behaviour.
There should be no reason to turn off this parameter, as it is
designed to enable Samba to more correctly emulate Windows.
Default: defer sharing violations = True
delete group script (G)
This is the full pathname to a script that will be run AS ROOT
smbd(8) when a group is requested to be deleted. It will expand any
%g to the group name passed. This script is only useful for
installations using the Windows NT domain administration tools.
Default: delete group script =
deleteprinter command (G)
With the introduction of MS-RPC based printer support for Windows
NT/2000 clients in Samba 2.2, it is now possible to delete a
printer at run time by issuing the DeletePrinter() RPC call.
For a Samba host this means that the printer must be physically
deleted from the underlying printing system. The deleteprinter
command defines a script to be run which will perform the necessary
operations for removing the printer from the print system and from
smb.conf.
The deleteprinter command is automatically called with only one
parameter: printer name.
Once the deleteprinter command has been executed, smbd will reparse
the smb.conf to check that the associated printer no longer exists.
If the sharename is still valid, then smbd will return an
ACCESS_DENIED error to the client.
Default: deleteprinter command =
Example: deleteprinter command = /usr/bin/removeprinter
delete readonly (S)
This parameter allows readonly files to be deleted. This is not
normal DOS semantics, but is allowed by UNIX.
This option may be useful for running applications such as rcs,
where UNIX file ownership prevents changing file permissions, and
DOS semantics prevent deletion of a read only file.
Default: delete readonly = no
delete share command (G)
Samba 2.2.0 introduced the ability to dynamically add and delete
shares via the Windows NT 4.0 Server Manager. The delete share
command is used to define an external program or script which will
remove an existing service definition from smb.conf.
In order to successfully execute the delete share command, smbd
requires that the administrator connects using a root account (i.e.
uid == 0) or has the SeDiskOperatorPrivilege. Scripts defined in
the delete share command parameter are executed as root.
When executed, smbd will automatically invoke the delete share
command with two parameters.
o configFile - the location of the global smb.conf file.
o shareName - the name of the existing service.
This parameter is only used to remove file shares. To delete printer
shares, see the deleteprinter command.
Default: delete share command =
Example: delete share command = /usr/local/bin/delshare
delete user from group script (G)
Full path to the script that will be called when a user is removed
from a group using the Windows NT domain administration tools. It
will be run by smbd(8) AS ROOT. Any %g will be replaced with the
group name and any %u will be replaced with the user name.
Default: delete user from group script =
Example: delete user from group script = /usr/sbin/deluser %u %g
delete user script (G)
This is the full pathname to a script that will be run by smbd(8)
when managing users with remote RPC (NT) tools.
This script is called when a remote client removes a user from the
server, normally using 'User Manager for Domains' or rpcclient.
This script should delete the given UNIX username.
Default: delete user script =
Example: delete user script = /usr/local/samba/bin/del_user %u
delete veto files (S)
This option is used when Samba is attempting to delete a directory
that contains one or more vetoed directories (see the veto files
option). If this option is set to no (the default) then if a vetoed
directory contains any non-vetoed files or directories then the
directory delete will fail. This is usually what you want.
If this option is set to yes, then Samba will attempt to
recursively delete any files and directories within the vetoed
directory. This can be useful for integration with file serving
systems such as NetAtalk which create meta-files within directories
you might normally veto DOS/Windows users from seeing (e.g.
.AppleDouble)
Setting delete veto files = yes allows these directories to be
transparently deleted when the parent directory is deleted (so long
as the user has permissions to do so).
Default: delete veto files = no
dfree cache time (S)
The dfree cache time should only be used on systems where a problem
occurs with the internal disk space calculations. This has been
known to happen with Ultrix, but may occur with other operating
systems. The symptom that was seen was an error of "Abort Retry
Ignore" at the end of each directory listing.
This is a new parameter introduced in Samba version 3.0.21. It
specifies in seconds the time that smbd will cache the output of a
disk free query. If set to zero (the default) no caching is done.
This allows a heavily loaded server to prevent rapid spawning of
dfree command scripts increasing the load.
By default this parameter is zero, meaning no caching will be done.
No default
Example: dfree cache time = dfree cache time = 60
dfree command (S)
The dfree command setting should only be used on systems where a
problem occurs with the internal disk space calculations. This has
been known to happen with Ultrix, but may occur with other
operating systems. The symptom that was seen was an error of "Abort
Retry Ignore" at the end of each directory listing.
This setting allows the replacement of the internal routines to
calculate the total disk space and amount available with an
external routine. The example below gives a possible script that
might fulfill this function.
In Samba version 3.0.21 this parameter has been changed to be a
per-share parameter, and in addition the parameter dfree cache time
was added to allow the output of this script to be cached for
systems under heavy load.
The external program will be passed a single parameter indicating a
directory in the filesystem being queried. This will typically
consist of the string ./. The script should return two integers in
ASCII. The first should be the total disk space in blocks, and the
second should be the number of available blocks. An optional third
return value can give the block size in bytes. The default
blocksize is 1024 bytes.
Note: Your script should NOT be setuid or setgid and should be
owned by (and writeable only by) root!
Where the script dfree (which must be made executable) could be:
#!/bin/sh
df $1 | tail -1 | awk '{print $(NF-4),$(NF-2)}'
or perhaps (on Sys V based systems):
#!/bin/sh
/usr/bin/df -k $1 | tail -1 | awk '{print $3" "$5}'
Note that you may have to replace the command names with full path
names on some systems.
By default internal routines for determining the disk capacity and
remaining space will be used.
No default
Example: dfree command = /usr/local/samba/bin/dfree
directory mode
This parameter is a synonym for directory mask.
directory mask (S)
This parameter is the octal modes which are used when converting
DOS modes to UNIX modes when creating UNIX directories.
When a directory is created, the necessary permissions are
calculated according to the mapping from DOS modes to UNIX
permissions, and the resulting UNIX mode is then bit-wise 'AND'ed
with this parameter. This parameter may be thought of as a bit-wise
MASK for the UNIX modes of a directory. Any bit not set here will
be removed from the modes set on a directory when it is created.
The default value of this parameter removes the 'group' and 'other'
write bits from the UNIX mode, allowing only the user who owns the
directory to modify it.
Following this Samba will bit-wise 'OR' the UNIX mode created from
this parameter with the value of the force directory mode
parameter. This parameter is set to 000 by default (i.e. no extra
mode bits are added).
Note that this parameter does not apply to permissions set by
Windows NT/2000 ACL editors. If the administrator wishes to enforce
a mask on access control lists also, they need to set the directory
security mask.
Default: directory mask = 0755
Example: directory mask = 0775
directory name cache size (S)
This parameter specifies the the size of the directory name cache.
It will be needed to turn this off for *BSD systems.
Default: directory name cache size = 100
directory security mask (S)
This parameter controls what UNIX permission bits will be set when
a Windows NT client is manipulating the UNIX permission on a
directory using the native NT security dialog box.
This parameter is applied as a mask (AND'ed with) to the incoming
permission bits, thus resetting any bits not in this mask. Make
sure not to mix up this parameter with force directory security
mode, which works similar like this one but uses logical OR instead
of AND. Essentially, zero bits in this mask are a set of bits that
will always be set to zero.
Essentially, all bits set to zero in this mask will result in
setting to zero the corresponding bits on the file permissions
regardless of the previous status of this bits on the file.
If not set explicitly this parameter is set to 0777 meaning a user
is allowed to set all the user/group/world permissions on a
directory.
Note that users who can access the Samba server through other means
can easily bypass this restriction, so it is primarily useful for
standalone "appliance" systems. Administrators of most normal
systems will probably want to leave it as the default of 0777.
Default: directory security mask = 0777
Example: directory security mask = 0700
disable netbios (G)
Enabling this parameter will disable netbios support in Samba.
Netbios is the only available form of browsing in all windows
versions except for 2000 and XP.
Note
Clients that only support netbios won't be able to see your
samba server when netbios support is disabled.
Default: disable netbios = no
disable spoolss (G)
Enabling this parameter will disable Samba's support for the
SPOOLSS set of MS-RPC's and will yield identical behavior as Samba
2.0.x. Windows NT/2000 clients will downgrade to using Lanman style
printing commands. Windows 9x/ME will be unaffected by the
parameter. However, this will also disable the ability to upload
printer drivers to a Samba server via the Windows NT Add Printer
Wizard or by using the NT printer properties dialog window. It will
also disable the capability of Windows NT/2000 clients to download
print drivers from the Samba host upon demand. Be very careful
about enabling this parameter.
Default: disable spoolss = no
display charset (G)
Specifies the charset that samba will use to print messages to
stdout and stderr. The default value is "LOCALE", which means
automatically set, depending on the current locale. The value
should generally be the same as the value of the parameter unix
charset.
Default: display charset = "LOCALE" or "ASCII" (depending on the
system)
Example: display charset = UTF8
dmapi support (S)
This parameter specifies whether Samba should use DMAPI to
determine whether a file is offline or not. This would typically be
used in conjunction with a hierarchical storage system that
automatically migrates files to tape.
Note that Samba infers the status of a file by examining the events
that a DMAPI application has registered interest in. This heuristic
is satisfactory for a number of hierarchical storage systems, but
there may be system for which it will fail. In this case, Samba may
erroneously report files to be offline.
This parameter is only available if a supported DMAPI
implementation was found at compilation time. It will only be used
if DMAPI is found to enabled on the system at run time.
Default: dmapi support = no
dns proxy (G)
Specifies that nmbd(8) when acting as a WINS server and finding
that a NetBIOS name has not been registered, should treat the
NetBIOS name word-for-word as a DNS name and do a lookup with the
DNS server for that name on behalf of the name-querying client.
Note that the maximum length for a NetBIOS name is 15 characters,
so the DNS name (or DNS alias) can likewise only be 15 characters,
maximum.
nmbd spawns a second copy of itself to do the DNS name lookup
requests, as doing a name lookup is a blocking action.
Default: dns proxy = yes
domain logons (G)
If set to yes, the Samba server will provide the netlogon service
for Windows 9X network logons for the workgroup it is in. This will
also cause the Samba server to act as a domain controller for NT4
style domain services. For more details on setting up this feature
see the Domain Control chapter of the Samba HOWTO Collection.
Default: domain logons = no
domain master (G)
Tell smbd(8) to enable WAN-wide browse list collation. Setting this
option causes nmbd to claim a special domain specific NetBIOS name
that identifies it as a domain master browser for its given
workgroup. Local master browsers in the same workgroup on
broadcast-isolated subnets will give this nmbd their local browse
lists, and then ask smbd(8) for a complete copy of the browse list
for the whole wide area network. Browser clients will then contact
their local master browser, and will receive the domain-wide browse
list, instead of just the list for their broadcast-isolated subnet.
Note that Windows NT Primary Domain Controllers expect to be able
to claim this workgroup specific special NetBIOS name that
identifies them as domain master browsers for that workgroup by
default (i.e. there is no way to prevent a Windows NT PDC from
attempting to do this). This means that if this parameter is set
and nmbd claims the special name for a workgroup before a Windows
NT PDC is able to do so then cross subnet browsing will behave
strangely and may fail.
If domain logons = yes, then the default behavior is to enable the
domain master parameter. If domain logons is not enabled (the
default setting), then neither will domain master be enabled by
default.
When domain logons = Yes the default setting for this parameter is
Yes, with the result that Samba will be a PDC. If domain master =
No, Samba will function as a BDC. In general, this parameter should
be set to 'No' only on a BDC.
Default: domain master = auto
dont descend (S)
There are certain directories on some systems (e.g., the /proc tree
under Linux) that are either not of interest to clients or are
infinitely deep (recursive). This parameter allows you to specify a
comma-delimited list of directories that the server should always
show as empty.
Note that Samba can be very fussy about the exact format of the
"dont descend" entries. For example you may need ./proc instead of
just /proc. Experimentation is the best policy :-)
Default: dont descend =
Example: dont descend = /proc,/dev
dos charset (G)
DOS SMB clients assume the server has the same charset as they do.
This option specifies which charset Samba should talk to DOS
clients.
The default depends on which charsets you have installed. Samba
tries to use charset 850 but falls back to ASCII in case it is not
available. Run testparm(1) to check the default on your system.
No default
dos filemode (S)
The default behavior in Samba is to provide UNIX-like behavior
where only the owner of a file/directory is able to change the
permissions on it. However, this behavior is often confusing to
DOS/Windows users. Enabling this parameter allows a user who has
write access to the file (by whatever means, including an ACL
permission) to modify the permissions (including ACL) on it. Note
that a user belonging to the group owning the file will not be
allowed to change permissions if the group is only granted read
access. Ownership of the file/directory may also be changed. Note
that using the VFS modules acl_xattr or acl_tdb which store native
Windows as meta-data will automatically turn this option on for any
share for which they are loaded, as they require this option to
emulate Windows ACLs correctly.
Default: dos filemode = no
dos filetime resolution (S)
Under the DOS and Windows FAT filesystem, the finest granularity on
time resolution is two seconds. Setting this parameter for a share
causes Samba to round the reported time down to the nearest two
second boundary when a query call that requires one second
resolution is made to smbd(8).
This option is mainly used as a compatibility option for Visual C++
when used against Samba shares. If oplocks are enabled on a share,
Visual C++ uses two different time reading calls to check if a file
has changed since it was last read. One of these calls uses a
one-second granularity, the other uses a two second granularity. As
the two second call rounds any odd second down, then if the file
has a timestamp of an odd number of seconds then the two timestamps
will not match and Visual C++ will keep reporting the file has
changed. Setting this option causes the two timestamps to match,
and Visual C++ is happy.
Default: dos filetime resolution = no
dos filetimes (S)
Under DOS and Windows, if a user can write to a file they can
change the timestamp on it. Under POSIX semantics, only the owner
of the file or root may change the timestamp. By default, Samba
emulates the DOS semantics and allows to change the timestamp on a
file if the user smbd is acting on behalf has write permissions.
Due to changes in Microsoft Office 2000 and beyond, the default for
this parameter has been changed from "no" to "yes" in Samba 3.0.14
and above. Microsoft Excel will display dialog box warnings about
the file being changed by another user if this parameter is not set
to "yes" and files are being shared between users.
Default: dos filetimes = yes
ea support (S)
This boolean parameter controls whether smbd(8) will allow clients
to attempt to store OS/2 style Extended attributes on a share. In
order to enable this parameter the underlying filesystem exported
by the share must support extended attributes (such as provided on
XFS and EXT3 on Linux, with the correct kernel patches). On Linux
the filesystem must have been mounted with the mount option
user_xattr in order for extended attributes to work, also extended
attributes must be compiled into the Linux kernel.
Default: ea support = no
enable asu support (G)
Hosts running the "Advanced Server for Unix (ASU)" product require
some special accomodations such as creating a builtin [ADMIN$]
share that only supports IPC connections. The has been the default
behavior in smbd for many years. However, certain Microsoft
applications such as the Print Migrator tool require that the
remote server support an [ADMIN$} file share. Disabling this
parameter allows for creating an [ADMIN$] file share in smb.conf.
Default: enable asu support = no
enable core files (G)
This parameter specifies whether core dumps should be written on
internal exits. Normally set to yes. You should never need to
change this.
Default: enable core files = yes
Example: enable core files = no
enable privileges (G)
This deprecated parameter controls whether or not smbd will honor
privileges assigned to specific SIDs via either net rpc rights or
one of the Windows user and group manager tools. This parameter is
enabled by default. It can be disabled to prevent members of the
Domain Admins group from being able to assign privileges to users
or groups which can then result in certain smbd operations running
as root that would normally run under the context of the connected
user.
An example of how privileges can be used is to assign the right to
join clients to a Samba controlled domain without providing root
access to the server via smbd.
Please read the extended description provided in the Samba HOWTO
documentation.
Default: enable privileges = yes
enable spoolss (G)
Inverted synonym for disable spoolss.
Default: enable spoolss = yes
encrypt passwords (G)
This boolean controls whether encrypted passwords will be
negotiated with the client. Note that Windows NT 4.0 SP3 and above
and also Windows 98 will by default expect encrypted passwords
unless a registry entry is changed. To use encrypted passwords in
Samba see the chapter "User Database" in the Samba HOWTO
Collection.
MS Windows clients that expect Microsoft encrypted passwords and
that do not have plain text password support enabled will be able
to connect only to a Samba server that has encrypted password
support enabled and for which the user accounts have a valid
encrypted password. Refer to the smbpasswd command man page for
information regarding the creation of encrypted passwords for user
accounts.
The use of plain text passwords is NOT advised as support for this
feature is no longer maintained in Microsoft Windows products. If
you want to use plain text passwords you must set this parameter to
no.
In order for encrypted passwords to work correctly smbd(8) must
either have access to a local smbpasswd(5) file (see the
smbpasswd(8) program for information on how to set up and maintain
this file), or set the security = [server|domain|ads] parameter
which causes smbd to authenticate against another server.
Default: encrypt passwords = yes
enhanced browsing (G)
This option enables a couple of enhancements to cross-subnet browse
propagation that have been added in Samba but which are not
standard in Microsoft implementations.
The first enhancement to browse propagation consists of a regular
wildcard query to a Samba WINS server for all Domain Master
Browsers, followed by a browse synchronization with each of the
returned DMBs. The second enhancement consists of a regular
randomised browse synchronization with all currently known DMBs.
You may wish to disable this option if you have a problem with
empty workgroups not disappearing from browse lists. Due to the
restrictions of the browse protocols, these enhancements can cause
a empty workgroup to stay around forever which can be annoying.
In general you should leave this option enabled as it makes
cross-subnet browse propagation much more reliable.
Default: enhanced browsing = yes
enumports command (G)
The concept of a "port" is fairly foreign to UNIX hosts. Under
Windows NT/2000 print servers, a port is associated with a port
monitor and generally takes the form of a local port (i.e. LPT1:,
COM1:, FILE:) or a remote port (i.e. LPD Port Monitor, etc...). By
default, Samba has only one port defined--"Samba Printer Port".
Under Windows NT/2000, all printers must have a valid port name. If
you wish to have a list of ports displayed (smbd does not use a
port name for anything) other than the default "Samba Printer
Port", you can define enumports command to point to a program which
should generate a list of ports, one per line, to standard output.
This listing will then be used in response to the level 1 and 2
EnumPorts() RPC.
Default: enumports command =
Example: enumports command = /usr/bin/listports
eventlog list (G)
This option defines a list of log names that Samba will report to
the Microsoft EventViewer utility. The listed eventlogs will be
associated with tdb file on disk in the $(lockdir)/eventlog.
The administrator must use an external process to parse the normal
Unix logs such as /var/log/messages and write then entries to the
eventlog tdb files. Refer to the eventlogadm(8) utility for how to
write eventlog entries.
Default: eventlog list =
Example: eventlog list = Security Application Syslog Apache
fake directory create times (S)
NTFS and Windows VFAT file systems keep a create time for all files
and directories. This is not the same as the ctime - status change
time - that Unix keeps, so Samba by default reports the earliest of
the various times Unix does keep. Setting this parameter for a
share causes Samba to always report midnight 1-1-1980 as the create
time for directories.
This option is mainly used as a compatibility option for Visual C++
when used against Samba shares. Visual C++ generated makefiles have
the object directory as a dependency for each object file, and a
make rule to create the directory. Also, when NMAKE compares
timestamps it uses the creation time when examining a directory.
Thus the object directory will be created if it does not exist, but
once it does exist it will always have an earlier timestamp than
the object files it contains.
However, Unix time semantics mean that the create time reported by
Samba will be updated whenever a file is created or or deleted in
the directory. NMAKE finds all object files in the object
directory. The timestamp of the last one built is then compared to
the timestamp of the object directory. If the directory's timestamp
if newer, then all object files will be rebuilt. Enabling this
option ensures directories always predate their contents and an
NMAKE build will proceed as expected.
Default: fake directory create times = no
fake oplocks (S)
Oplocks are the way that SMB clients get permission from a server
to locally cache file operations. If a server grants an oplock
(opportunistic lock) then the client is free to assume that it is
the only one accessing the file and it will aggressively cache file
data. With some oplock types the client may even cache file
open/close operations. This can give enormous performance benefits.
When you set fake oplocks = yes, smbd(8) will always grant oplock
requests no matter how many clients are using the file.
It is generally much better to use the real oplocks support rather
than this parameter.
If you enable this option on all read-only shares or shares that
you know will only be accessed from one client at a time such as
physically read-only media like CDROMs, you will see a big
performance improvement on many operations. If you enable this
option on shares where multiple clients may be accessing the files
read-write at the same time you can get data corruption. Use this
option carefully!
Default: fake oplocks = no
follow symlinks (S)
This parameter allows the Samba administrator to stop smbd(8) from
following symbolic links in a particular share. Setting this
parameter to no prevents any file or directory that is a symbolic
link from being followed (the user will get an error). This option
is very useful to stop users from adding a symbolic link to
/etc/passwd in their home directory for instance. However it will
slow filename lookups down slightly.
This option is enabled (i.e. smbd will follow symbolic links) by
default.
Default: follow symlinks = yes
force create mode (S)
This parameter specifies a set of UNIX mode bit permissions that
will always be set on a file created by Samba. This is done by
bitwise 'OR'ing these bits onto the mode bits of a file that is
being created. The default for this parameter is (in octal) 000.
The modes in this parameter are bitwise 'OR'ed onto the file mode
after the mask set in the create mask parameter is applied.
The example below would force all newly created files to have read
and execute permissions set for 'group' and 'other' as well as the
read/write/execute bits set for the 'user'.
Default: force create mode = 000
Example: force create mode = 0755
force directory mode (S)
This parameter specifies a set of UNIX mode bit permissions that
will always be set on a directory created by Samba. This is done by
bitwise 'OR'ing these bits onto the mode bits of a directory that
is being created. The default for this parameter is (in octal) 0000
which will not add any extra permission bits to a created
directory. This operation is done after the mode mask in the
parameter directory mask is applied.
The example below would force all created directories to have read
and execute permissions set for 'group' and 'other' as well as the
read/write/execute bits set for the 'user'.
Default: force directory mode = 000
Example: force directory mode = 0755
force directory security mode (S)
This parameter controls what UNIX permission bits can be modified
when a Windows NT client is manipulating the UNIX permission on a
directory using the native NT security dialog bo