Chapter 2. Fast Start: Cure for Impatience
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## Chapter 2. Fast Start: Cure for Impatience

### John H. Terpstra

Samba Team

`<jht@samba.org>`

When we first asked for suggestions for inclusion in the Samba HOWTO documentation, someone wrote asking for example configurations and lots of them. That is remarkably difficult to do without losing a lot of value that can be derived from presenting many extracts from working systems. That is what the rest of this document does. It does so with extensive descriptions of the configuration possibilities within the context of the chapter that covers it. We hope that this chapter is the medicine that has been requested.

The information in this chapter is very sparse compared with the book “Samba-3 by Example” that was written after the original version of this book was nearly complete. “Samba-3 by Example” was the result of feedback from reviewers during the final copy editing of the first edition. It was interesting to see that reader feedback mirrored that given by the original reviewers. In any case, a month and a half was spent in doing basic research to better understand what new as well as experienced network administrators would best benefit from. The book “Samba-3 by Example” is the result of that research. What is presented in the few pages of this book is covered far more comprehensively in the second edition of “Samba-3 by Example”. The second edition of both books will be released at the same time.

So in summary, the book “The Official Samba-3 HOWTO & Reference Guide” is intended as the equivalent of an auto mechanic's repair guide. The book “Samba-3 by Example” is the equivalent of the driver's guide that explains how to drive the car. If you want complete network configuration examples, go to Samba-3 by Example.

## Features and Benefits

Samba needs very little configuration to create a basic working system. In this chapter we progress from the simple to the complex, for each providing all steps and configuration file changes needed to make each work. Please note that a comprehensively configured system will likely employ additional smart features. These additional features are covered in the remainder of this document.

The examples used here have been obtained from a number of people who made requests for example configurations. All identities have been obscured to protect the guilty, and any resemblance to unreal nonexistent sites is deliberate.

## Description of Example Sites

In the first set of configuration examples we consider the case of exceptionally simple system requirements. There is a real temptation to make something that should require little effort much too complex.

“Anonymous Read-Only Document Server” documents the type of server that might be sufficient to serve CD-ROM images, or reference document files for network client use. This configuration is also discussed in “Standalone Servers”, “Reference Documentation Server”. The purpose for this configuration is to provide a shared volume that is read-only that anyone, even guests, can access.

The second example shows a minimal configuration for a print server that anyone can print to as long as they have the correct printer drivers installed on their computer. This is a mirror of the system described in “Standalone Servers”, “Central Print Serving”.

The next example is of a secure office file and print server that will be accessible only to users who have an account on the system. This server is meant to closely resemble a workgroup file and print server, but has to be more secure than an anonymous access machine. This type of system will typically suit the needs of a small office. The server provides no network logon facilities, offers no domain control; instead it is just a network-attached storage (NAS) device and a print server.

The later example consider more complex systems that will either integrate into existing MS Windows networks or replace them entirely. These cover domain member servers as well as Samba domain control (PDC/BDC) and finally describes in detail a large distributed network with branch offices in remote locations.

## Worked Examples

The configuration examples are designed to cover everything necessary to get Samba running. They do not cover basic operating system platform configuration, which is clearly beyond the scope of this text.

It is also assumed that Samba has been correctly installed, either by way of installation of the packages that are provided by the operating system vendor or through other means.

### Standalone Server

A standalone server implies no more than the fact that it is not a domain controller and it does not participate in domain control. It can be a simple, workgroup-like server, or it can be a complex server that is a member of a domain security context.

As the examples are developed, every attempt is made to progress the system toward greater capability, just as one might expect would happen in a real business office as that office grows in size and its needs change.

#### Anonymous Read-Only Document Server

The purpose of this type of server is to make available to any user any documents or files that are placed on the shared resource. The shared resource could be a CD-ROM drive, a CD-ROM image, or a file storage area.

- The file system share point will be `/export`.

- All files will be owned by a user called Jack Baumbach. Jack's login name will be jackb. His password will be m0r3pa1n of course, that's just the example we are using; do not use this in a production environment because all readers of this document will know it.

Procedure 2.1. Installation Procedure: Read-Only Server

Example 2.1. Anonymous Read-Only Server Configuration

# Global parameters
`[global]`
`workgroup = MIDEARTH`
`netbios name = HOBBIT`
`security = share`
`[data]`
`comment = Data`
`path = /export`
`read only = Yes`
`guest ok = Yes`

1. Add user to system (with creation of the user's home directory):

       root# useradd -c "Jack Baumbach" -m -g users -p m0r3pa1n jackb

2. Create directory, and set permissions and ownership:

       root# mkdir /export
       root# chmod u+rwx,g+rx,o+rx /export
       root# chown jackb.users /export

3. Copy the files that should be shared to the `/export` directory.

4. Install the Samba configuration file (`/etc/samba/smb.conf`) as shown in Anonymous Read-Only Server Configuration.

5. Test the configuration file by executing the following command:

       root# testparm

   Alternatively, where you are operating from a master configuration file called `smb.conf.master`, the following sequence of commands might prove more appropriate:

       root#  cd /etc/samba
       root#  testparm -s smb.conf.master > smb.conf
       root#  testparm

   Note any error messages that might be produced. Proceed only if error-free output has been obtained. An example of typical output that should be generated from the above configuration file is shown here:

       Load smb config files from /etc/samba/smb.conf
       Processing section "[data]"
       Loaded services file OK.
       Server role: ROLE_STANDALONE
       Press enter to see a dump of your service definitions
       [Press enter]

       # Global parameters
       [global]
       	workgroup = MIDEARTH
       	netbios name = HOBBIT
       	security = share

       [data]
       	comment = Data
       	path = /export
       	read only = Yes
       	guest only = Yes

6. Start Samba using the method applicable to your operating system platform. The method that should be used is platform dependent. Refer to Starting Samba for further information regarding the starting of Samba.

7. Configure your MS Windows client for workgroup MIDEARTH, set the machine name to ROBBINS, reboot, wait a few (2 - 5) minutes, then open Windows Explorer and visit the Network Neighborhood. The machine HOBBIT should be visible. When you click this machine icon, it should open up to reveal the data share. After you click the share, it should open up to reveal the files previously placed in the `/export` directory.

The information above (following # Global parameters) provides the complete contents of the `/etc/samba/smb.conf` file.

#### Anonymous Read-Write Document Server

We should view this configuration as a progression from the previous example. The difference is that shared access is now forced to the user identity of jackb and to the primary group jackb belongs to. One other refinement we can make is to add the user jackb to the `smbpasswd` file. To do this, execute:

    root# smbpasswd -a jackb
    New SMB password: m0r3pa1n
    Retype new SMB password: m0r3pa1n
    Added user jackb.

Addition of this user to the `smbpasswd` file allows all files to be displayed in the Explorer Properties boxes as belonging to jackb instead of to User Unknown.

The complete, modified `smb.conf` file is as shown in “Modified Anonymous Read-Write smb.conf”.

Example 2.2. Modified Anonymous Read-Write smb.conf

# Global parameters
`[global]`
`workgroup = MIDEARTH`
`netbios name = HOBBIT`
`security = SHARE`
`[data]`
`comment = Data`
`path = /export`
`force user = jackb`
`force group = users`
`read only = No`
`guest ok = Yes`

#### Anonymous Print Server

An anonymous print server serves two purposes:

- It allows printing to all printers from a single location.

- It reduces network traffic congestion due to many users trying to access a limited number of printers.

In the simplest of anonymous print servers, it is common to require the installation of the correct printer drivers on the Windows workstation. In this case the print server will be designed to just pass print jobs through to the spooler, and the spooler should be configured to do raw pass-through to the printer. In other words, the print spooler should not filter or process the data stream being passed to the printer.

In this configuration, it is undesirable to present the Add Printer Wizard, and we do not want to have automatic driver download, so we disable it in the following configuration. “Anonymous Print Server smb.conf” is the resulting `smb.conf` file.

Example 2.3. Anonymous Print Server smb.conf

# Global parameters
`[global]`
`workgroup = MIDEARTH`
`netbios name = LUTHIEN`
`security = share`
`printcap name = cups`
`disable spoolss = Yes`
`show add printer wizard = No`
`printing = cups`
`[printers]`
`comment = All Printers`
`path = /var/spool/samba`
`guest ok = Yes`
`printable = Yes`
`use client driver = Yes`
`browseable = No`

The above configuration is not ideal. It uses no smart features, and it deliberately presents a less than elegant solution. But it is basic, and it does print. Samba makes use of the direct printing application program interface that is provided by CUPS. When Samba has been compiled and linked with the CUPS libraries, the default printing system will be CUPS. By specifying that the printcap name is CUPS, Samba will use the CUPS library API to communicate directly with CUPS for all printer functions. It is possible to force the use of external printing commands by setting the value of the `printing` to either SYSV or BSD, and thus the value of the parameter `printcap name` must be set to something other than CUPS. In such case, it could be set to the name of any file that contains a list of printers that should be made available to Windows clients.

### Note

Windows users will need to install a local printer and then change the print to device after installation of the drivers. The print to device can then be set to the network printer on this machine.

Make sure that the directory `/var/spool/samba` is capable of being used as intended. The following steps must be taken to achieve this:

- The directory must be owned by the superuser (root) user and group:

      root# chown root.root /var/spool/samba

- Directory permissions should be set for public read-write with the sticky bit set as shown:

      root# chmod a+twrx /var/spool/samba

  The purpose of setting the sticky bit is to prevent who does not own the temporary print file from being able to take control of it with the potential for devious misuse.

### Note

On CUPS-enabled systems there is a facility to pass raw data directly to the printer without intermediate processing via CUPS print filters. Where use of this mode of operation is desired, it is necessary to configure a raw printing device. It is also necessary to enable the raw mime handler in the `/etc/mime.conv` and `/etc/mime.types` files. Refer to “Explicitly Enable raw Printing for application/octet-stream”.

#### Secure Read-Write File and Print Server

We progress now from simple systems to a server that is slightly more complex.

Our new server will require a public data storage area in which only authenticated users (i.e., those with a local account) can store files, as well as a home directory. There will be one printer that should be available for everyone to use.

In this hypothetical environment (no espionage was conducted to obtain this data), the site is demanding a simple environment that is secure enough but not too difficult to use.

Site users will be Jack Baumbach, Mary Orville, and Amed Sehkah. Each will have a password (not shown in further examples). Mary will be the printer administrator and will own all files in the public share.

This configuration will be based on user-level security that is the default, and for which the default is to store Microsoft Windows-compatible encrypted passwords in a file called `/etc/samba/smbpasswd`. The default `smb.conf` entry that makes this happen is passdb backend = smbpasswd, guest. Since this is the default, it is not necessary to enter it into the configuration file. Note that the guest backend is added to the list of active passdb backends no matter whether it specified directly in Samba configuration file or not.

Procedure 2.2. Installing the Secure Office Server

Example 2.4. Secure Office Server smb.conf

# Global parameters
`[global]`
`workgroup = MIDEARTH`
`netbios name = OLORIN`
`printcap name = cups`
`disable spoolss = Yes`
`show add printer wizard = No`
`printing = cups`
`[homes]`
`comment = Home Directories`
`valid users = %S`
`read only = No`
`browseable = No`
`[public]`
`comment = Data`
`path = /export`
`force user = maryo`
`force group = users`
`read only = No`
`[printers]`
`comment = All Printers`
`path = /var/spool/samba`
`printer admin = root, maryo`
`create mask = 0600`
`guest ok = Yes`
`printable = Yes`
`use client driver = Yes`
`browseable = No`

1. Add all users to the operating system:

       root# useradd -c "Jack Baumbach" -m -g users -p m0r3pa1n jackb
       root# useradd -c "Mary Orville" -m -g users -p secret maryo
       root# useradd -c "Amed Sehkah" -m -g users -p secret ameds

2. Configure the Samba `smb.conf` file as shown in “Secure Office Server smb.conf”.

3. Initialize the Microsoft Windows password database with the new users:

       root# smbpasswd -a root
       New SMB password: bigsecret
       Reenter smb password: bigsecret
       Added user root.

       root# smbpasswd -a jackb
       New SMB password: m0r3pa1n
       Retype new SMB password: m0r3pa1n
       Added user jackb.

       root# smbpasswd -a maryo
       New SMB password: secret
       Reenter smb password: secret
       Added user maryo.

       root# smbpasswd -a ameds
       New SMB password: mysecret
       Reenter smb password: mysecret
       Added user ameds.

4. Install printer using the CUPS Web interface. Make certain that all printers that will be shared with Microsoft Windows clients are installed as raw printing devices.

5. Start Samba using the operating system administrative interface. Alternately, this can be done manually by executing:

       root#  nmbd; smbd;

   Both applications automatically execute as daemons. Those who are paranoid about maintaining control can add the `-D` flag to coerce them to start up in daemon mode.

6. Configure the `/export` directory:

       root# mkdir /export
       root# chown maryo.users /export
       root# chmod u=rwx,g=rwx,o-rwx /export

7. Check that Samba is running correctly:

       root# smbclient -L localhost -U%
       Domain=[MIDEARTH] OS=[UNIX] Server=[Samba-3.0.20]

       Sharename      Type      Comment
       ---------      ----      -------
       public         Disk      Data
       IPC$           IPC       IPC Service (Samba-3.0.20)
       ADMIN$         IPC       IPC Service (Samba-3.0.20)
       hplj4          Printer   hplj4

       Server               Comment
       ---------            -------
       OLORIN               Samba-3.0.20

       Workgroup            Master
       ---------            -------
       MIDEARTH             OLORIN

   The following error message indicates that Samba was not running:

       root#  smbclient -L olorin -U%
       Error connecting to 192.168.1.40 (Connection refused)
       Connection to olorin failed

8. Connect to OLORIN as maryo:

       root# smbclient //olorin/maryo -Umaryo%secret
       OS=[UNIX] Server=[Samba-3.0.20]
       smb: \> dir
       .                              D        0  Sat Jun 21 10:58:16 2003
       ..                             D        0  Sat Jun 21 10:54:32 2003
       Documents                      D        0  Fri Apr 25 13:23:58 2003
       DOCWORK                        D        0  Sat Jun 14 15:40:34 2003
       OpenOffice.org                 D        0  Fri Apr 25 13:55:16 2003
       .bashrc                        H     1286  Fri Apr 25 13:23:58 2003
       .netscape6                    DH        0  Fri Apr 25 13:55:13 2003
       .mozilla                      DH        0  Wed Mar  5 11:50:50 2003
       .kermrc                        H      164  Fri Apr 25 13:23:58 2003
       .acrobat                      DH        0  Fri Apr 25 15:41:02 2003

       		55817 blocks of size 524288. 34725 blocks available
       smb: \> q

By now you should be getting the hang of configuration basics. Clearly, it is time to explore slightly more complex examples. For the remainder of this chapter we abbreviate instructions, since there are previous examples.

### Domain Member Server

In this instance we consider the simplest server configuration we can get away with to make an accounting department happy. Let's be warned, the users are accountants and they do have some nasty demands. There is a budget for only one server for this department.

The network is managed by an internal Information Services Group (ISG), to which we belong. Internal politics are typical of a medium-sized organization; Human Resources is of the opinion that they run the ISG because they are always adding and disabling users. Also, departmental managers have to fight tooth and nail to gain basic network resources access for their staff. Accounting is different, though, they get exactly what they want. So this should set the scene.

We use the users from the last example. The accounting department has a general printer that all departmental users may use. There is also a check printer that may be used only by the person who has authority to print checks. The chief financial officer (CFO) wants that printer to be completely restricted and for it to be located in the private storage area in her office. It therefore must be a network printer.

The accounting department uses an accounting application called SpytFull that must be run from a central application server. The software is licensed to run only off one server, there are no workstation components, and it is run off a mapped share. The data store is in a UNIX-based SQL backend. The UNIX gurus look after that, so this is not our problem.

The accounting department manager (maryo) wants a general filing system as well as a separate file storage area for form letters (nastygrams). The form letter area should be read-only to all accounting staff except the manager. The general filing system has to have a structured layout with a general area for all staff to store general documents as well as a separate file area for each member of her team that is private to that person, but she wants full access to all areas. Users must have a private home share for personal work-related files and for materials not related to departmental operations.

#### Example Configuration

The server valinor will be a member server of the company domain. Accounting will have only a local server. User accounts will be on the domain controllers, as will desktop profiles and all network policy files.

Example 2.5. Member Server smb.conf (Globals)

# Global parameters
`[global]`
`workgroup = MIDEARTH`
`netbios name = VALINOR`
`security = DOMAIN`
`printcap name = cups`
`disable spoolss = Yes`
`show add printer wizard = No`
`idmap uid = 15000-20000`
`idmap gid = 15000-20000`
`winbind use default domain = Yes`
`printing = cups`

Example 2.6. Member Server smb.conf (Shares and Services)

`[homes]`
`comment = Home Directories`
`valid users = %S`
`read only = No`
`browseable = No`
`[spytfull]`
`comment = Accounting Application Only`
`path = /export/spytfull`
`valid users = @Accounts`
`admin users = maryo`
`read only = Yes`
`[public]`
`comment = Data`
`path = /export/public`
`read only = No`
`[printers]`
`comment = All Printers`
`path = /var/spool/samba`
`printer admin = root, maryo`
`create mask = 0600`
`guest ok = Yes`
`printable = Yes`
`use client driver = Yes`
`browseable = No`

1. Do not add users to the UNIX/Linux server; all of this will run off the central domain.

2. Configure `smb.conf` according to Member server smb.conf (globals) and Member server smb.conf (shares and services).

3. Join the domain. Note: Do not start Samba until this step has been completed!

       root# net rpc join -Uroot%'bigsecret'
       Joined domain MIDEARTH.

4. Make absolutely certain that you disable (shut down) the `nscd` daemon on any system on which `winbind` is configured to run.

5. Start Samba following the normal method for your operating system platform. If you wish to do this manually, execute as root:

       root# nmbd; smbd; winbindd;

6. Configure the name service switch (NSS) control file on your system to resolve user and group names via winbind. Edit the following lines in `/etc/nsswitch.conf`:

       passwd: files winbind
       group:  files winbind
       hosts:  files dns winbind

7. Set the password for `wbinfo` to use:

       root# wbinfo --set-auth-user=root%'bigsecret'

8. Validate that domain user and group credentials can be correctly resolved by executing:

       root# wbinfo -u
       MIDEARTH\maryo
       MIDEARTH\jackb
       MIDEARTH\ameds
       ...
       MIDEARTH\root

       root# wbinfo -g
       MIDEARTH\Domain Users
       MIDEARTH\Domain Admins
       MIDEARTH\Domain Guests
       ...
       MIDEARTH\Accounts

9. Check that `winbind` is working. The following demonstrates correct username resolution via the `getent` system utility:

       root# getent passwd maryo
       maryo:x:15000:15003:Mary Orville:/home/MIDEARTH/maryo:/bin/false

10. A final test that we have this under control might be reassuring:

        root# touch /export/a_file
        root# chown maryo /export/a_file
        root# ls -al /export/a_file
        ...
        -rw-r--r--    1 maryo    users       11234 Jun 21 15:32 a_file
        ...

        root# rm /export/a_file

11. Configuration is now mostly complete, so this is an opportune time to configure the directory structure for this site:

        root# mkdir -p /export/{spytfull,public}
        root# chmod ug=rwxS,o=x /export/{spytfull,public}
        root# chown maryo.Accounts /export/{spytfull,public}

### Domain Controller

For the remainder of this chapter the focus is on the configuration of domain control. The examples that follow are for two implementation strategies. Remember, our objective is to create a simple but working solution. The remainder of this book should help to highlight opportunity for greater functionality and the complexity that goes with it.

A domain controller configuration can be achieved with a simple configuration using the new tdbsam password backend. This type of configuration is good for small offices, but has limited scalability (cannot be replicated), and performance can be expected to fall as the size and complexity of the domain increases.

The use of tdbsam is best limited to sites that do not need more than a Primary Domain Controller (PDC). As the size of a domain grows the need for additional domain controllers becomes apparent. Do not attempt to under-resource a Microsoft Windows network environment; domain controllers provide essential authentication services. The following are symptoms of an under-resourced domain control environment:

- Domain logons intermittently fail.

- File access on a domain member server intermittently fails, giving a permission denied error message.

A more scalable domain control authentication backend option might use Microsoft Active Directory or an LDAP-based backend. Samba-3 provides for both options as a domain member server. As a PDC, Samba-3 is not able to provide an exact alternative to the functionality that is available with Active Directory. Samba-3 can provide a scalable LDAP-based PDC/BDC solution.

The tdbsam authentication backend provides no facility to replicate the contents of the database, except by external means (i.e., there is no self-contained protocol in Samba-3 for Security Account Manager database [SAM] replication).

### Note

If you need more than one domain controller, do not use a tdbsam authentication backend.

#### Example: Engineering Office

The engineering office network server we present here is designed to demonstrate use of the new tdbsam password backend. The tdbsam facility is new to Samba-3. It is designed to provide many user and machine account controls that are possible with Microsoft Windows NT4. It is safe to use this in smaller networks.

Example 2.7. Engineering Office smb.conf (globals)

`[global]`
`workgroup = MIDEARTH`
`netbios name = FRODO`
`passdb backend = tdbsam`
`printcap name = cups`
`add user script = /usr/sbin/useradd -m %u`
`delete user script = /usr/sbin/userdel -r %u`
`add group script = /usr/sbin/groupadd %g`
`delete group script = /usr/sbin/groupdel %g`
`add user to group script = /usr/sbin/groupmod -A %u %g`
`delete user from group script = /usr/sbin/groupmod -R %u %g`
`add machine script = /usr/sbin/useradd -s /bin/false -d /var/lib/nobody %u`
# Note: The following specifies the default logon script.
# Per user logon scripts can be specified in the user account using pdbedit
`logon script = scripts\logon.bat`
# This sets the default profile path. Set per user paths with pdbedit
`logon path = \\%L\Profiles\%U`
`logon drive = H:`
`logon home = \\%L\%U`
`domain logons = Yes`
`os level = 35`
`preferred master = Yes`
`domain master = Yes`
`idmap uid = 15000-20000`
`idmap gid = 15000-20000`
`printing = cups`

Example 2.8. Engineering Office smb.conf (shares and services)

`[homes]`
`comment = Home Directories`
`valid users = %S`
`read only = No`
`browseable = No`
# Printing auto-share (makes printers available thru CUPS)
`[printers]`
`comment = All Printers`
`path = /var/spool/samba`
`printer admin = root, maryo`
`create mask = 0600`
`guest ok = Yes`
`printable = Yes`
`browseable = No`
`[print$]`
`comment = Printer Drivers Share`
`path = /var/lib/samba/drivers`
`write list = maryo, root`
`printer admin = maryo, root`
# Needed to support domain logons
`[netlogon]`
`comment = Network Logon Service`
`path = /var/lib/samba/netlogon`
`admin users = root, maryo`
`guest ok = Yes`
`browseable = No`
# For profiles to work, create a user directory under the path
# shown. i.e., mkdir -p /var/lib/samba/profiles/maryo
`[Profiles]`
`comment = Roaming Profile Share`
`path = /var/lib/samba/profiles`
`read only = No`
`profile acls = Yes`
# Other resource (share/printer) definitions would follow below.

1. A working PDC configuration using the tdbsam password backend can be found in Engineering Office smb.conf (globals) together with Engineering Office smb.conf (shares and services):

2. Create UNIX group accounts as needed using a suitable operating system tool:

       root# groupadd ntadmins
       root# groupadd designers
       root# groupadd engineers
       root# groupadd qateam

3. Create user accounts on the system using the appropriate tool provided with the operating system. Make sure all user home directories are created also. Add users to groups as required for access control on files, directories, printers, and as required for use in the Samba environment.

4. Assign each of the UNIX groups to NT groups by executing this shell script (You could name the script `initGroups.sh`):

       #!/bin/bash
       #### Keep this as a shell script for future re-use

       # First assign well known groups
       net groupmap add ntgroup="Domain Admins" unixgroup=ntadmins rid=512 type=d
       net groupmap add ntgroup="Domain Users"  unixgroup=users rid=513 type=
       net groupmap add ntgroup="Domain Guests" unixgroup=nobody rid=514 type=d

       # Now for our added Domain Groups
       net groupmap add ntgroup="Designers" unixgroup=designers type=d
       net groupmap add ntgroup="Engineers" unixgroup=engineers type=d
       net groupmap add ntgroup="QA Team"   unixgroup=qateam    type=d

5. Create the `scripts` directory for use in the `[NETLOGON]` share:

       root# mkdir -p /var/lib/samba/netlogon/scripts

   Place the logon scripts that will be used (batch or cmd scripts) in this directory.

The above configuration provides a functional PDC system to which must be added file shares and printers as required.

#### A Big Organization

In this section we finally get to review in brief a Samba-3 configuration that uses a Lightweight Directory Access (LDAP)-based authentication backend. The main reasons for this choice are to provide the ability to host primary and Backup Domain Control (BDC), as well as to enable a higher degree of scalability to meet the needs of a very distributed environment.

##### The Primary Domain Controller

This is an example of a minimal configuration to run a Samba-3 PDC using an LDAP authentication backend. It is assumed that the operating system has been correctly configured.

The Idealx scripts (or equivalent) are needed to manage LDAP-based POSIX and/or SambaSamAccounts. The Idealx scripts may be downloaded from the Idealx Web site. They may also be obtained from the Samba tarball. Linux distributions tend to install the Idealx scripts in the `/usr/share/doc/packages/sambaXXXXXX/examples/LDAP/smbldap-tools` directory. Idealx scripts version `smbldap-tools-0.9.1` are known to work well.

Example 2.9. LDAP backend smb.conf for PDC

# Global parameters
`[global]`
`workgroup = MIDEARTH`
`netbios name = FRODO`
`passdb backend = ldapsam:ldap://localhost`
`username map = /etc/samba/smbusers`
`printcap name = cups`
`add user script = /usr/local/sbin/smbldap-useradd -m '%u'`
`delete user script = /usr/local/sbin/smbldap-userdel %u`
`add group script = /usr/local/sbin/smbldap-groupadd -p '%g'`
`delete group script = /usr/local/sbin/smbldap-groupdel '%g'`
`add user to group script = /usr/local/sbin/smbldap-groupmod -m '%u' '%g'`
`delete user from group script = /usr/local/sbin/smbldap-groupmod -x '%u' '%g'`
`set primary group script = /usr/local/sbin/smbldap-usermod -g '%g' '%u'`
`add machine script = /usr/local/sbin/smbldap-useradd -w '%u'`
`logon script = scripts\logon.bat`
`logon path = \\%L\Profiles\%U`
`logon drive = H:`
`logon home = \\%L\%U`
`domain logons = Yes`
`os level = 35`
`preferred master = Yes`
`domain master = Yes`
`ldap suffix = dc=quenya,dc=org`
`ldap machine suffix = ou=People`
`ldap user suffix = ou=People`
`ldap group suffix = ou=People`
`ldap idmap suffix = ou=People`
`ldap admin dn = cn=Manager,dc=quenya,dc=org`
`ldap ssl = no`
`ldap passwd sync = Yes`
`idmap uid = 15000-20000`
`idmap gid = 15000-20000`
`printing = cups`

1. Obtain from the Samba sources `~/examples/LDAP/samba.schema` and copy it to the `/etc/openldap/schema/` directory.

2. Set up the LDAP server. This example is suitable for OpenLDAP 2.1.x. The `/etc/openldap/slapd.conf` file. <title>Example slapd.conf File</title>

       # Note commented out lines have been removed
       include         /etc/openldap/schema/core.schema
       include         /etc/openldap/schema/cosine.schema
       include         /etc/openldap/schema/inetorgperson.schema
       include         /etc/openldap/schema/nis.schema
       include         /etc/openldap/schema/samba.schema

       pidfile         /var/run/slapd/slapd.pid
       argsfile        /var/run/slapd/slapd.args

       database        bdb
       suffix          "dc=quenya,dc=org"
       rootdn          "cn=Manager,dc=quenya,dc=org"
       rootpw          {SSHA}06qDkonA8hk6W6SSnRzWj0/pBcU3m0/P
       # The password for the above is 'nastyon3'

       directory     /var/lib/ldap

       index   objectClass     eq
       index cn                      pres,sub,eq
       index sn                      pres,sub,eq
       index uid                     pres,sub,eq
       index displayName             pres,sub,eq
       index uidNumber               eq
       index gidNumber               eq
       index memberUid               eq
       index   sambaSID              eq
       index   sambaPrimaryGroupSID  eq
       index   sambaDomainName       eq
       index   default               sub

3. Create the following file `initdb.ldif`:

       # Organization for SambaXP Demo
       dn: dc=quenya,dc=org
       objectclass: dcObject
       objectclass: organization
       dc: quenya
       o: SambaXP Demo
       description: The SambaXP Demo LDAP Tree

       # Organizational Role for Directory Management
       dn: cn=Manager,dc=quenya,dc=org
       objectclass: organizationalRole
       cn: Manager
       description: Directory Manager

       # Setting up the container for users
       dn: ou=People, dc=quenya, dc=org
       objectclass: top
       objectclass: organizationalUnit
       ou: People

       # Set up an admin handle for People OU
       dn: cn=admin, ou=People, dc=quenya, dc=org
       cn: admin
       objectclass: top
       objectclass: organizationalRole
       objectclass: simpleSecurityObject
       userPassword: {SSHA}0jBHgQ1vp4EDX2rEMMfIudvRMJoGwjVb
       # The password for above is 'mordonL8'

4. Load the initial data above into the LDAP database:

       root# slapadd -v -l initdb.ldif

5. Start the LDAP server using the appropriate tool or method for the operating system platform on which it is installed.

6. Install the Idealx script files in the `/usr/local/sbin` directory, then configure the smbldap_conf.pm file to match your system configuration.

7. The `smb.conf` file that drives this backend can be found in example LDAP backend smb.conf for PDC. Add additional stanzas as required.

8. Add the LDAP password to the `secrets.tdb` file so Samba can update the LDAP database:

       root# smbpasswd -w mordonL8

9. Add users and groups as required. Users and groups added using Samba tools will automatically be added to both the LDAP backend and the operating system as required.

##### Backup Domain Controller

“Remote LDAP BDC smb.conf” shows the example configuration for the BDC. Note that the `smb.conf` file does not specify the smbldap-tools scripts they are not needed on a BDC. Add additional stanzas for shares and printers as required.

Example 2.10. Remote LDAP BDC smb.conf

# Global parameters
`[global]`
`workgroup = MIDEARTH`
`netbios name = GANDALF`
`passdb backend = ldapsam:ldap://frodo.quenya.org`
`username map = /etc/samba/smbusers`
`printcap name = cups`
`logon script = scripts\logon.bat`
`logon path = \\%L\Profiles\%U`
`logon drive = H:`
`logon home = \\%L\%U`
`domain logons = Yes`
`os level = 33`
`preferred master = Yes`
`domain master = No`
`ldap suffix = dc=quenya,dc=org`
`ldap machine suffix = ou=People`
`ldap user suffix = ou=People`
`ldap group suffix = ou=People`
`ldap idmap suffix = ou=People`
`ldap admin dn = cn=Manager,dc=quenya,dc=org`
`ldap ssl = no`
`ldap passwd sync = Yes`
`idmap uid = 15000-20000`
`idmap gid = 15000-20000`
`printing = cups`

1. Decide if the BDC should have its own LDAP server or not. If the BDC is to be the LDAP server, change the following `smb.conf` as indicated. The default configuration in Remote LDAP BDC smb.conf uses a central LDAP server.

2. Configure the NETLOGON and PROFILES directory as for the PDC in “Remote LDAP BDC smb.conf”.

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