New structure for the docs:

 - Same name for a doc everywhere (howto -> Samba-HOWTO-Collection, etc)
 - Shorter and more clearly structured Makefile
 - Make it possible to change the paths for the images
(This used to be commit 96f6c05f25acc8a9bb1977b8bd5cc97ce511b6b1)

1 files changed, 1244 insertions, 0 deletions

diff --git a/docs/Samba-HOWTO-Collection/Winbind.xml b/docs/Samba-HOWTO-Collection/Winbind.xml
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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+		"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
+  <!ENTITY % global_entities SYSTEM '../entities/global.entities'>
+  %global_entities;
+]>
+<chapter id="winbind">
+
+<chapterinfo>
+	<author>
+		<firstname>Tim</firstname><surname>Potter</surname>
+		<affiliation>
+			<orgname>Samba Team</orgname>
+			<address><email>tpot@linuxcare.com.au</email></address>
+		</affiliation>
+	</author>
+	&author.tridge;
+	<author>
+		<firstname>Naag</firstname><surname>Mummaneni</surname>
+		<affiliation>
+			<address><email>getnag@rediffmail.com</email></address>
+		</affiliation>
+		<contrib>Notes for Solaris</contrib>
+	</author>
+	<author>
+		<firstname>John</firstname><surname>Trostel</surname>
+		<affiliation>
+			<address><email>jtrostel@snapserver.com</email></address>
+			<orgname>SNAP</orgname>
+		</affiliation>
+	</author>
+
+	&author.jelmer;
+	&author.jht;
+	<pubdate>27 June 2002</pubdate>
+</chapterinfo>
+
+<title>Winbind: Use of Domain Accounts</title>
+
+<sect1>
+	<title>Features and Benefits</title>
+
+	<para>
+	Integration of UNIX and Microsoft Windows NT through a unified logon has
+	been considered a <quote>holy grail</quote> in heterogeneous computing environments for
+	a long time.
+	</para>
+
+	<para>
+	There is one other facility without which UNIX and Microsoft Windows network
+	interoperability would suffer greatly. It is imperative that there be a
+	mechanism for sharing files across UNIX systems and to be able to assign
+	domain user and group ownerships with integrity.
+	</para>
+
+	<para>
+	<emphasis>winbind</emphasis> is a component of the Samba suite of programs that
+	solves the unified logon problem. Winbind uses a UNIX implementation of Microsoft
+	RPC calls, Pluggable Authentication Modules, and the Name Service Switch to
+	allow Windows NT domain users to appear and operate as UNIX users on a UNIX
+	machine. This chapter describes the Winbind system, explaining the functionality
+	it provides, how it is configured, and how it works internally.
+	</para>
+
+	<para>
+	Winbind provides three separate functions:
+	</para>
+
+	<itemizedlist>
+		<listitem><para>
+		Authentication of user credentials (via PAM).
+		</para></listitem>
+
+		<listitem><para>
+		Identity resolution (via NSS).
+		</para></listitem>
+
+		<listitem><para>
+		Winbind maintains a database called winbind_idmap.tdb in which it stores
+		mappings between UNIX UIDs / GIDs and NT SIDs. This mapping is used only
+		for users and groups that do not have a local UID/GID. It stored the UID/GID
+		allocated from the idmap uid/gid range that it has mapped to the NT SID.
+		If <parameter>idmap backend</parameter> has been specified as ldapsam:url
+		then instead of using a local mapping Winbind will obtain this information
+		from the LDAP database.
+		</para></listitem>
+	</itemizedlist>
+
+	<note><para>
+	<indexterm><primary>winbindd</primary></indexterm>
+	<indexterm><primary>starting samba</primary><secondary>winbindd</secondary></indexterm>
+	If <command>winbindd</command> is not running, smbd (which calls <command>winbindd</command>) will fall back to
+	using purely local information from <filename>/etc/passwd</filename> and <filename>/etc/group</filename> and no dynamic
+	mapping will be used.
+	</para></note>
+
+
+	<!--	<figure id="winbind_idmap"><title></title>
+	<mediaobject>
+	<imageobject role="latex"><imagedata fileref="howto/imagefiles/idmap_winbind_no_loop" scale="50" scalefit="1"/></imageobject>
+	<imageobject><imagedata fileref="howto/imagefiles/idmap_winbind_no_loop.png" scale="50" scalefit="1"/></imageobject>
+	</mediaobject>
+	</figure>-->
+
+</sect1>
+
+
+<sect1>
+	<title>Introduction</title>
+	
+	<para>It is well known that UNIX and Microsoft Windows NT have 
+	different models for representing user and group information and 
+	use different technologies for implementing them. This fact has 
+	made it difficult to integrate the two systems in a satisfactory 
+	manner.</para>
+	
+	<para>One common solution in use today has been to create 
+	identically named user accounts on both the UNIX and Windows systems 
+	and use the Samba suite of programs to provide file and print services 
+	between the two. This solution is far from perfect, however, as 
+	adding and deleting users on both sets of machines becomes a chore 
+	and two sets of passwords are required &smbmdash; both of which
+	can lead to synchronization problems between the UNIX and Windows 
+	systems and confusion for users.</para>
+	
+	<para>We divide the unified logon problem for UNIX machines into 
+	three smaller problems:</para>
+	
+	<itemizedlist>
+		<listitem><para>Obtaining Windows NT user and group information.
+		</para></listitem>
+		
+		<listitem><para>Authenticating Windows NT users.
+		</para></listitem>
+		
+		<listitem><para>Password changing for Windows NT users.
+		</para></listitem>
+	</itemizedlist>
+
+
+	<para>Ideally, a prospective solution to the unified logon problem 
+	would satisfy all the above components without duplication of 
+	information on the UNIX machines and without creating additional 
+	tasks for the system administrator when maintaining users and 
+	groups on either system. The Winbind system provides a simple 
+	and elegant solution to all three components of the unified logon 
+	problem.</para>
+</sect1>
+
+
+<sect1>
+	<title>What Winbind Provides</title>
+
+	<para>Winbind unifies UNIX and Windows NT account management by 
+	allowing a UNIX box to become a full member of an NT domain. Once 
+	this is done the UNIX box will see NT users and groups as if 
+	they were <quote>native</quote> UNIX users and groups, allowing the NT domain 
+	to be used in much the same manner that NIS+ is used within 
+	UNIX-only environments.</para>
+	
+	<para>The end result is that whenever any 
+	program on the UNIX machine asks the operating system to lookup 
+	a user or group name, the query will be resolved by asking the 
+	NT Domain Controller for the specified domain to do the lookup.
+	Because Winbind hooks into the operating system at a low level 
+	(via the NSS name resolution modules in the C library), this 
+	redirection to the NT Domain Controller is completely 
+	transparent.</para>
+	
+	<para>Users on the UNIX machine can then use NT user and group 
+	names as they would <quote>native</quote> UNIX names. They can chown files 
+	so they are owned by NT domain users or even login to the 
+	UNIX machine and run a UNIX X-Window session as a domain user.</para>
+	
+	<para>The only obvious indication that Winbind is being used is 
+	that user and group names take the form <constant>DOMAIN\user</constant> and 
+	<constant>DOMAIN\group</constant>. This is necessary as it allows Winbind to determine 
+	that redirection to a Domain Controller is wanted for a particular 
+	lookup and which trusted domain is being referenced.</para>
+	
+	<para>Additionally, Winbind provides an authentication service 
+	that hooks into the Pluggable Authentication Modules (PAM) system 
+	to provide authentication via an NT domain to any PAM-enabled 
+	applications. This capability solves the problem of synchronizing 
+	passwords between systems since all passwords are stored in a single 
+	location (on the Domain Controller).</para>
+	
+	<sect2>
+		<title>Target Uses</title>
+		
+		<para>Winbind is targeted at organizations that have an 
+		existing NT-based domain infrastructure into which they wish 
+		to put UNIX workstations or servers. Winbind will allow these 
+		organizations to deploy UNIX workstations without having to 
+		maintain a separate account infrastructure. This greatly 
+		simplifies the administrative overhead of deploying UNIX 
+		workstations into an NT-based organization.</para>
+		
+		<para>Another interesting way in which we expect Winbind to 
+		be used is as a central part of UNIX-based appliances. Appliances 
+		that provide file and print services to Microsoft-based networks 
+		will be able to use Winbind to provide seamless integration of 
+		the appliance into the domain.</para>
+	</sect2>
+</sect1>
+
+
+
+<sect1>
+	<title>How Winbind Works</title>
+	
+	<para>The Winbind system is designed around a client/server 
+	architecture. A long running <command>winbindd</command> daemon 
+	listens on a UNIX domain socket waiting for requests
+	to arrive. These requests are generated by the NSS and PAM 
+	clients and is processed sequentially.</para>
+	
+	<para>The technologies used to implement Winbind are described 
+	in detail below.</para>
+	
+	<sect2>
+		<title>Microsoft Remote Procedure Calls</title>
+		
+		<para>Over the last few years, efforts have been underway 
+		by various Samba Team members to decode various aspects of 
+		the Microsoft Remote Procedure Call (MSRPC) system. This 
+		system is used for most network-related operations between 
+		Windows NT machines including remote management, user authentication
+		and print spooling. Although initially this work was done 
+		to aid the implementation of Primary Domain Controller (PDC) 
+		functionality in Samba, it has also yielded a body of code that 
+		can be used for other purposes.</para>
+		
+		<para>Winbind uses various MSRPC calls to enumerate domain users 
+		and groups and to obtain detailed information about individual 
+		users or groups. Other MSRPC calls can be used to authenticate 
+		NT domain users and to change user passwords. By directly querying 
+		a Windows PDC for user and group information, Winbind maps the 
+		NT account information onto UNIX user and group names.</para>
+	</sect2>
+	
+	<sect2>
+		<title>Microsoft Active Directory Services</title>
+
+		<para>
+                Since late 2001, Samba has gained the ability to
+                interact with Microsoft Windows 2000 using its <quote>Native
+                Mode</quote> protocols, rather than the NT4 RPC services.
+                Using LDAP and Kerberos, a Domain Member running
+                Winbind can enumerate users and groups in exactly the
+                same way as a Windows 200x client would, and in so doing
+                provide a much more efficient and effective Winbind implementation. 
+                </para>
+	</sect2>
+	
+	<sect2>
+		<title>Name Service Switch</title>
+		
+		<para>The Name Service Switch, or NSS, is a feature that is 
+		present in many UNIX operating systems. It allows system 
+		information such as hostnames, mail aliases and user information 
+		to be resolved from different sources. For example, a standalone 
+		UNIX workstation may resolve system information from a series of 
+		flat files stored on the local filesystem. A networked workstation 
+		may first attempt to resolve system information from local files, 
+		and then consult an NIS database for user information or a DNS server 
+		for hostname information.</para>
+		
+		<para>The NSS application programming interface allows Winbind 
+		to present itself as a source of system information when 
+		resolving UNIX usernames and groups. Winbind uses this interface, 
+		and information obtained from a Windows NT server using MSRPC 
+		calls to provide a new source of account enumeration. Using standard 
+		UNIX library calls, one can enumerate the users and groups on
+		a UNIX machine running Winbind and see all users and groups in 
+		a NT domain plus any trusted domain as though they were local 
+		users and groups.</para>
+		
+		<para>The primary control file for NSS is 
+		<filename>/etc/nsswitch.conf</filename>. 
+		When a UNIX application makes a request to do a lookup, 
+		the C library looks in <filename>/etc/nsswitch.conf</filename> 
+		for a line that matches the service type being requested, for 
+		example the <quote>passwd</quote> service type is used when user or group names 
+		are looked up. This config line specifies which implementations 
+		of that service should be tried and in what order. If the passwd 
+		config line is:</para>
+
+		<para><screen>
+		passwd: files example
+		</screen></para>
+
+		<para>then the C library will first load a module called 
+		<filename>/lib/libnss_files.so</filename> followed by
+		the module <filename>/lib/libnss_example.so</filename>. The 
+		C library will dynamically load each of these modules in turn 
+		and call resolver functions within the modules to try to resolve 
+		the request. Once the request is resolved, the C library returns the
+		result to the application.</para>
+		
+		<para>This NSS interface provides an easy way for Winbind 
+		to hook into the operating system. All that needs to be done 
+		is to put <filename>libnss_winbind.so</filename> in <filename>/lib/</filename> 
+		then add <quote>winbind</quote> into <filename>/etc/nsswitch.conf</filename> at 
+		the appropriate place. The C library will then call Winbind to 
+		resolve user and group names.</para>
+	</sect2>
+	
+	<sect2>
+		<title>Pluggable Authentication Modules</title>
+		
+		<para>Pluggable Authentication Modules, also known as PAM, 
+		is a system for abstracting authentication and authorization 
+		technologies. With a PAM module it is possible to specify different 
+		authentication methods for different system applications without 
+		having to recompile these applications. PAM is also useful
+		for implementing a particular policy for authorization. For example, 
+		a system administrator may only allow console logins from users 
+		stored in the local password file but only allow users resolved from 
+		a NIS database to log in over the network.</para>
+		
+		<para>Winbind uses the authentication management and password 
+		management PAM interface to integrate Windows NT users into a 
+		UNIX system. This allows Windows NT users to log in to a UNIX 
+		machine and be authenticated against a suitable Primary Domain 
+		Controller. These users can also change their passwords and have 
+		this change take effect directly on the Primary Domain Controller.
+		</para>
+		
+		<para>PAM is configured by providing control files in the directory 
+		<filename>/etc/pam.d/</filename> for each of the services that 
+		require authentication. When an authentication request is made 
+		by an application, the PAM code in the C library looks up this
+		control file to determine what modules to load to do the 
+		authentication check and in what order. This interface makes adding 
+		a new authentication service for Winbind very easy. All that needs 
+		to be done is that the <filename>pam_winbind.so</filename> module 
+		is copied to <filename>/lib/security/</filename> and the PAM 
+		control files for relevant services are updated to allow 
+		authentication via Winbind. See the PAM documentation
+		in <link linkend="pam">PAM-Based Distributed Authentication</link> for more information.</para>
+	</sect2>
+	
+	
+	<sect2>
+		<title>User and Group ID Allocation</title>
+		
+		<para>When a user or group is created under Windows NT/200x 
+		it is allocated a numerical relative identifier (RID). This is 
+		slightly different from UNIX which has a range of numbers that are 
+		used to identify users, and the same range in which to identify 
+		groups. It is Winbind's job to convert RIDs to UNIX ID numbers and
+		vice versa. When Winbind is configured, it is given part of the UNIX 
+		user ID space and a part of the UNIX group ID space in which to 
+		store Windows NT users and groups. If a Windows NT user is 
+		resolved for the first time, it is allocated the next UNIX ID from 
+		the range. The same process applies for Windows NT groups. Over 
+		time, Winbind will have mapped all Windows NT users and groups
+		to UNIX user IDs and group IDs.</para>
+
+		<para>The results of this mapping are stored persistently in 
+		an ID mapping database held in a tdb database). This ensures that 
+		RIDs are mapped to UNIX IDs in a consistent way.</para>
+	</sect2>
+	
+	
+	<sect2>
+		<title>Result Caching</title>
+
+		<para>
+<indexterm><primary>SAM</primary></indexterm>
+			An active system can generate a lot of user and group 
+		name lookups. To reduce the network cost of these lookups, Winbind 
+		uses a caching scheme based on the SAM sequence number supplied 
+		by NT Domain Controllers. User or group information returned 
+		by a PDC is cached by Winbind along with a sequence number also 
+		returned by the PDC. This sequence number is incremented by 
+		Windows NT whenever any user or group information is modified. If 
+		a cached entry has expired, the sequence number is requested from 
+		the PDC and compared against the sequence number of the cached entry. 
+		If the sequence numbers do not match, then the cached information 
+		is discarded and up-to-date information is requested directly 
+		from the PDC.</para>
+	</sect2>
+</sect1>
+
+
+<sect1>
+	<title>Installation and Configuration</title>
+	
+<sect2>
+<title>Introduction</title>
+
+<para>
+This section describes the procedures used to get Winbind up and 
+running. Winbind is capable of providing access 
+and authentication control for Windows Domain users through an NT 
+or Windows 200x PDC for regular services, such as telnet and ftp, as
+well for Samba services.
+</para>
+
+<itemizedlist>
+<listitem>
+	<para>
+	<emphasis>Why should I do this?</emphasis>
+	</para>
+	
+	<para>This allows the Samba administrator to rely on the 
+	authentication mechanisms on the Windows NT/200x PDC for the authentication 
+	of Domain Members. Windows NT/200x users no longer need to have separate 
+	accounts on the Samba server.
+	</para>
+</listitem>
+
+<listitem>
+	<para>
+	<emphasis>Who should be reading this document?</emphasis>
+	</para>
+	
+	<para>
+	This document is designed for system administrators. If you are 
+	implementing Samba on a file server and wish to (fairly easily) 
+	integrate existing Windows NT/200x users from your PDC onto the
+	Samba server, this document is for you.
+	</para>
+</listitem>
+</itemizedlist>
+</sect2>
+
+
+<sect2>
+<title>Requirements</title>
+
+<para>
+If you have a Samba configuration file that you are currently using, <emphasis>BACK IT UP!</emphasis>
+If your system already uses PAM, <emphasis>back up the <filename>/etc/pam.d</filename> directory
+contents!</emphasis> If you haven't already made a boot disk, <emphasis>MAKE ONE NOW!</emphasis>
+</para>
+
+<para>
+Messing with the PAM configuration files can make it nearly impossible to log in to your machine. That's
+why you want to be able to boot back into your machine in single user mode and restore your
+<filename>/etc/pam.d</filename> back to the original state they were in if you get frustrated with the
+way things are going.
+</para>
+
+<para>
+The latest version of Samba-3 includes a functioning winbindd daemon. Please refer to the <ulink
+url="http://samba.org/">main Samba Web page</ulink> or, better yet, your closest Samba mirror site for
+instructions on downloading the source code.
+</para>
+
+<para>
+To allow domain users the ability to access Samba shares and files, as well as potentially other services
+provided by your Samba machine, PAM must be set up properly on your
+machine. In order to compile the Winbind modules, you should have at least the PAM development libraries installed
+on your system. Please refer the PAM web site <ulink url="http://www.kernel.org/pub/linux/libs/pam/"/>.
+</para>
+</sect2>
+
+<sect2>
+<title>Testing Things Out</title>
+
+<para>
+Before starting, it is probably best to kill off all the Samba-related daemons running on your server.
+Kill off all &smbd;, &nmbd;, and &winbindd; processes that may be running. To use PAM,
+make sure that you have the standard PAM package that supplies the <filename>/etc/pam.d</filename>
+directory structure, including the PAM modules that are used by PAM-aware services, several pam libraries,
+and the <filename>/usr/doc</filename> and <filename>/usr/man</filename> entries for pam. Winbind built
+better in Samba if the pam-devel package is also installed. This package includes the header files
+needed to compile PAM-aware applications.
+</para>
+
+<sect3>
+<title>Configure <filename>nsswitch.conf</filename> and the Winbind Libraries on Linux and Solaris</title>
+
+<para>
+PAM is a standard component of most current generation UNIX/Linux systems. Unfortunately, few systems install
+the <filename>pam-devel</filename> libraries that are needed to build PAM-enabled Samba. Additionally, Samba-3
+may auto-install the Winbind files into their correct locations on your system, so before you get too far down
+the track be sure to check if the following configuration is really
+necessary. You may only need to configure
+<filename>/etc/nsswitch.conf</filename>.
+</para>
+
+<para>
+The libraries needed to run the &winbindd; daemon through nsswitch need to be copied to their proper locations:
+</para>
+
+<para>
+<screen>
+&rootprompt;<userinput>cp ../samba/source/nsswitch/libnss_winbind.so /lib</userinput>
+</screen>
+</para>
+
+<para>
+I also found it necessary to make the following symbolic link:
+</para>
+
+<para>
+&rootprompt; <userinput>ln -s /lib/libnss_winbind.so /lib/libnss_winbind.so.2</userinput>
+</para>
+
+<para>And, in the case of Sun Solaris:</para>
+<screen>
+&rootprompt;<userinput>ln -s /usr/lib/libnss_winbind.so /usr/lib/libnss_winbind.so.1</userinput>
+&rootprompt;<userinput>ln -s /usr/lib/libnss_winbind.so /usr/lib/nss_winbind.so.1</userinput>
+&rootprompt;<userinput>ln -s /usr/lib/libnss_winbind.so /usr/lib/nss_winbind.so.2</userinput>
+</screen>
+
+<para>
+Now, as root you need to edit <filename>/etc/nsswitch.conf</filename> to 
+allow user and group entries to be visible from the &winbindd;
+daemon. My <filename>/etc/nsswitch.conf</filename> file look like 
+this after editing:
+</para>
+
+<para><programlisting>
+	passwd:     files winbind
+	shadow:     files 
+	group:      files winbind
+</programlisting></para>
+
+<para>	
+The libraries needed by the <command>winbindd</command> daemon will be automatically 
+entered into the <command>ldconfig</command> cache the next time 
+your system reboots, but it is faster (and you do not need to reboot) if you do it manually:
+</para>
+
+<para>
+&rootprompt;<userinput>/sbin/ldconfig -v | grep winbind</userinput>
+</para>
+
+<para>
+This makes <filename>libnss_winbind</filename> available to winbindd 
+and echos back a check to you.
+</para>
+
+</sect3>
+
+<sect3>
+<title>NSS Winbind on AIX</title>
+
+<para>(This section is only for those running AIX.)</para>
+
+<para>
+The Winbind AIX identification module gets built as <filename>libnss_winbind.so</filename> in the
+nsswitch directory of the Samba source. This file can be copied to <filename>/usr/lib/security</filename>,
+and the AIX naming convention would indicate that it should be named WINBIND. A stanza like the following:
+</para>
+
+<para><programlisting>
+WINBIND:
+        program = /usr/lib/security/WINBIND
+        options = authonly
+</programlisting></para>
+
+<para>
+can then be added to <filename>/usr/lib/security/methods.cfg</filename>. This module only supports
+identification, but there have been success reports using the standard Winbind PAM module for
+authentication. Use caution configuring loadable authentication
+modules since you can make
+it impossible to logon to the system. More information about the AIX authentication module API can
+be found at <quote>Kernel Extensions and Device Support Programming Concepts for AIX</quote><ulink
+url="http://publibn.boulder.ibm.com/doc_link/en_US/a_doc_lib/aixprggd/kernextc/sec_load_mod.htm">
+in Chapter 18(John, there is no section like this in 18). Loadable Authentication Module Programming
+Interface</ulink> and more information on administering the  modules
+can be found at <ulink
+url="http://publibn.boulder.ibm.com/doc_link/en_US/a_doc_lib/aixbman/baseadmn/iandaadmin.htm"> <quote>System
+Management Guide: Operating System and Devices.</quote></ulink>
+</para>
+</sect3>
+
+<sect3>
+<title>Configure smb.conf</title>
+
+<para>
+Several parameters are needed in the &smb.conf; file to control the behavior of &winbindd;. These
+are described in more detail in the <citerefentry><refentrytitle>winbindd</refentrytitle>
+<manvolnum>8</manvolnum></citerefentry> man page. My &smb.conf; file, as shown in <link
+linkend="winbindcfg">the next example</link>, was modified to include the necessary entries in the [global] section.
+</para>
+
+<para><smbconfexample id="winbindcfg">
+		<title>smb.conf for Winbind set-up</title>
+<smbconfsection>[global]</smbconfsection>
+     &lt;...&gt;
+<smbconfcomment> separate domain and username with '+', like DOMAIN+username</smbconfcomment>
+<smbconfoption><name>winbind separator</name><value>+</value></smbconfoption>
+<smbconfcomment> use uids from 10000 to 20000 for domain users</smbconfcomment>
+<smbconfoption><name>idmap uid</name><value>10000-20000</value></smbconfoption>
+<smbconfcomment> use gids from 10000 to 20000 for domain groups</smbconfcomment>
+<smbconfoption><name>idmap gid</name><value>10000-20000</value></smbconfoption>
+<smbconfcomment> allow enumeration of winbind users and groups</smbconfcomment>
+<smbconfoption><name>winbind enum users</name><value>yes</value></smbconfoption>
+<smbconfoption><name>winbind enum groups</name><value>yes</value></smbconfoption>
+<smbconfcomment> give winbind users a real shell (only needed if they have telnet access)</smbconfcomment>
+<smbconfoption><name>template homedir</name><value>/home/winnt/%D/%U</value></smbconfoption>
+<smbconfoption><name>template shell</name><value>/bin/bash</value></smbconfoption>
+</smbconfexample></para>
+
+</sect3>
+
+
+<sect3>
+<title>Join the Samba Server to the PDC Domain</title>
+
+<para>
+Enter the following command to make the Samba server join the 
+PDC domain, where <replaceable>PDC</replaceable> is the name of 
+your PDC and <replaceable>Administrator</replaceable> is 
+a domain user who has administrative privileges in the domain.
+</para>
+	
+
+<para>
+&rootprompt;<userinput>/usr/local/samba/bin/net rpc join -S PDC -U Administrator</userinput>
+</para>
+
+<para>
+The proper response to the command should be: <quote>Joined the domain 
+<replaceable>DOMAIN</replaceable></quote> where <replaceable>DOMAIN</replaceable> 
+is your DOMAIN name.
+</para>
+
+</sect3>
+
+<sect3>
+<title>Starting and Testing the <command>winbindd</command> Daemon</title>
+
+<para>
+Eventually, you will want to modify your Samba startup script to 
+automatically invoke the winbindd daemon when the other parts of 
+Samba start, but it is possible to test out just the Winbind
+portion first. To start up Winbind services, enter the following 
+command as root:
+</para>
+	
+<para>
+&rootprompt;<userinput>/usr/local/samba/sbin/winbindd</userinput>
+</para>
+
+<note><para>
+The above assumes that Samba has been installed in the <filename>/usr/local/samba</filename>
+directory tree. You may need to search for the location of Samba files if this is not the
+location of <command>winbindd</command> on your system.
+</para></note>
+
+<para>
+Winbindd can now also run in <quote>dual daemon mode</quote>. This will make it 
+run as two processes. The first will answer all requests from the cache,
+thus making responses to clients faster. The other will
+update the cache for the query that the first has just responded.
+The advantage of this is that responses stay accurate and are faster. 
+You can enable dual daemon mode by adding <option>-B</option> to the command-line:
+</para>
+
+<para>
+&rootprompt;<userinput>/usr/local/samba/sbin/winbindd -B</userinput>
+</para>
+
+<para>
+I'm always paranoid and like to make sure the daemon is really running.
+</para>
+
+<para>
+&rootprompt;<userinput>ps -ae | grep winbindd</userinput>
+</para>
+<para>
+This command should produce output like this, if the daemon is running you would expect
+to see a report something like this:
+</para>
+<screen>
+3025 ?        00:00:00 winbindd
+</screen>
+
+<para>
+Now, for the real test, try to get some information about the users on your PDC:
+</para>
+
+<para>
+&rootprompt;<userinput>/usr/local/samba/bin/wbinfo -u</userinput>
+</para>
+
+<para>	
+This should echo back a list of users on your Windows users on 
+your PDC. For example, I get the following response:
+</para>
+
+<para><screen>
+	CEO+Administrator
+	CEO+burdell
+	CEO+Guest
+	CEO+jt-ad
+	CEO+krbtgt
+	CEO+TsInternetUser
+</screen></para>
+
+<para>
+Obviously, I have named my domain <quote>CEO</quote> and my <smbconfoption><name>winbind separator</name></smbconfoption> is <quote>+</quote>.
+</para>
+
+<para>
+You can do the same sort of thing to get group information from the PDC:
+</para>
+
+<para><screen>
+&rootprompt;<userinput>/usr/local/samba/bin/wbinfo -g</userinput>
+	CEO+Domain Admins
+	CEO+Domain Users
+	CEO+Domain Guests
+	CEO+Domain Computers
+	CEO+Domain Controllers
+	CEO+Cert Publishers
+	CEO+Schema Admins
+	CEO+Enterprise Admins
+	CEO+Group Policy Creator Owners
+</screen></para>
+
+<para>
+The function <command>getent</command> can now be used to get unified 
+lists of both local and PDC users and groups. Try the following command:
+</para>
+
+<para>
+&rootprompt;<userinput>getent passwd</userinput>
+</para>
+	
+<para>
+You should get a list that looks like your <filename>/etc/passwd</filename> 
+list followed by the domain users with their new UIDs, GIDs, home 
+directories and default shells.
+</para>
+
+<para>
+The same thing can be done for groups with the command:
+</para>
+
+<para>
+&rootprompt;<userinput>getent group</userinput>
+</para>
+
+</sect3>
+
+
+<sect3>
+<title>Fix the init.d Startup Scripts</title>
+
+<sect4>
+<title>Linux</title>
+
+<para>
+The &winbindd; daemon needs to start up after the &smbd; and &nmbd; daemons are running. 
+To accomplish this task, you need to modify the startup scripts of your system.
+They are located at <filename>/etc/init.d/smb</filename> in Red Hat Linux and they are located in 
+<filename>/etc/init.d/samba</filename> in Debian Linux. Edit your
+script to add commands to invoke this daemon in the proper sequence. My 
+startup script starts up &smbd;, &nmbd;, and &winbindd; from the 
+<filename>/usr/local/samba/bin</filename> directory directly. The <command>start</command> 
+function in the script looks like this:
+</para>
+
+<para><programlisting>
+start() {
+        KIND="SMB"
+        echo -n $"Starting $KIND services: "
+        daemon /usr/local/samba/bin/smbd $SMBDOPTIONS
+        RETVAL=$?
+        echo
+        KIND="NMB"
+        echo -n $"Starting $KIND services: "
+        daemon /usr/local/samba/bin/nmbd $NMBDOPTIONS
+        RETVAL2=$?
+        echo
+        KIND="Winbind"
+        echo -n $"Starting $KIND services: "
+        daemon /usr/local/samba/sbin/winbindd
+        RETVAL3=$?
+        echo
+        [ $RETVAL -eq 0 -a $RETVAL2 -eq 0 -a $RETVAL3 -eq 0 ] &amp;&amp; \
+		touch /var/lock/subsys/smb || RETVAL=1
+        return $RETVAL
+}
+</programlisting></para>
+
+<para>If you would like to run winbindd in dual daemon mode, replace 
+the line :
+<programlisting>
+        daemon /usr/local/samba/sbin/winbindd
+</programlisting>
+
+in the example above with:
+
+<programlisting>
+        daemon /usr/local/samba/sbin/winbindd -B
+</programlisting>.
+</para>
+
+<para>
+The <command>stop</command> function has a corresponding entry to shut down the 
+services and looks like this:
+</para>
+
+<para><programlisting>
+stop() {
+        KIND="SMB"
+        echo -n $"Shutting down $KIND services: "
+        killproc smbd
+        RETVAL=$?
+        echo
+        KIND="NMB"
+        echo -n $"Shutting down $KIND services: "
+        killproc nmbd
+        RETVAL2=$?
+        echo
+        KIND="Winbind"
+        echo -n $"Shutting down $KIND services: "
+        killproc winbindd
+        RETVAL3=$?
+        [ $RETVAL -eq 0 -a $RETVAL2 -eq 0 -a $RETVAL3 -eq 0 ] &amp;&amp; \
+		 rm -f /var/lock/subsys/smb
+        echo ""
+        return $RETVAL
+}
+</programlisting></para>
+</sect4>
+
+<sect4>
+<title>Solaris</title>
+
+<para>
+Winbind does not work on Solaris 9, see <link linkend="winbind-solaris9">Winbind on Solaris 9</link> section for details.
+</para>
+
+<para>
+On Solaris, you need to modify the <filename>/etc/init.d/samba.server</filename> startup script. It
+usually only starts smbd and nmbd but should now start winbindd, too. If you have Samba installed in
+<filename>/usr/local/samba/bin</filename>, the file could contains something like this:
+</para>
+
+<para>
+	<smbfile name="samba.server.sh">
+	<programlisting>
+	##
+	## samba.server
+	##
+
+	if [ ! -d /usr/bin ]
+	then                    # /usr not mounted
+		exit
+	fi
+
+	killproc() {            # kill the named process(es)
+		pid=`/usr/bin/ps -e |
+		     /usr/bin/grep -w $1 |
+		     /usr/bin/sed -e 's/^  *//' -e 's/ .*//'`
+		[ "$pid" != "" ] &amp;&amp; kill $pid
+	}
+	 
+	# Start/stop processes required for Samba server
+
+	case "$1" in
+
+	'start')
+	#
+	# Edit these lines to suit your installation (paths, workgroup, host)
+	#
+	echo Starting SMBD
+	   /usr/local/samba/bin/smbd -D -s \
+		/usr/local/samba/smb.conf
+
+	echo Starting NMBD
+	   /usr/local/samba/bin/nmbd -D -l \
+		/usr/local/samba/var/log -s /usr/local/samba/smb.conf
+
+	echo Starting Winbind Daemon
+	   /usr/local/samba/sbin/winbindd
+	   ;;
+
+	'stop')
+	   killproc nmbd
+	   killproc smbd
+	   killproc winbindd
+	   ;;
+
+	*)
+	   echo "Usage: /etc/init.d/samba.server { start | stop }"
+	   ;;
+	esac
+</programlisting></smbfile></para>
+
+<para>
+Again, if you would like to run Samba in dual daemon mode, replace:
+<programlisting>
+	/usr/local/samba/sbin/winbindd
+</programlisting>
+in the script above with:
+<programlisting>
+	/usr/local/samba/sbin/winbindd -B
+</programlisting>
+</para>
+
+</sect4>
+
+<sect4>
+<title>Restarting</title>
+<para>
+If you restart the &smbd;, &nmbd;, and &winbindd; daemons at this point, you
+should be able to connect to the Samba server as a Domain Member just as
+if you were a local user.
+</para>
+</sect4>
+</sect3>
+
+<sect3>
+<title>Configure Winbind and PAM</title>
+
+<para>
+If you have made it this far, you know that <command>winbindd</command> and Samba are working
+together. If you want to use Winbind to provide authentication for other 
+services, keep reading. The PAM configuration files need to be altered in
+this step. (Did you remember to make backups of your original 
+<filename>/etc/pam.d</filename> files? If not, do it now.)
+</para>
+
+<para>
+You will need a PAM module to use winbindd with these other services. This 
+module will be compiled in the <filename>../source/nsswitch</filename> directory
+by invoking the command:
+</para>
+
+<para>
+&rootprompt;<userinput>make nsswitch/pam_winbind.so</userinput>
+</para>
+
+<para>
+from the <filename>../source</filename> directory. The
+<filename>pam_winbind.so</filename> file should be copied to the location of
+your other PAM security modules. On my Red Hat system, this was the
+<filename>/lib/security</filename> directory. On Solaris, the PAM security 
+modules reside in <filename>/usr/lib/security</filename>.
+</para>
+
+<para>
+&rootprompt;<userinput>cp ../samba/source/nsswitch/pam_winbind.so /lib/security</userinput>
+</para>
+
+<sect4>
+<title>Linux/FreeBSD-specific PAM configuration</title>
+
+<para>
+The <filename>/etc/pam.d/samba</filename> file does not need to be changed. I 
+just left this file as it was:
+</para>
+
+
+<para><programlisting>
+	auth    required        /lib/security/pam_stack.so service=system-auth
+	account required        /lib/security/pam_stack.so service=system-auth
+</programlisting></para>
+
+<para>
+The other services that I modified to allow the use of Winbind 
+as an authentication service were the normal login on the console (or a terminal 
+session), telnet logins, and ftp service. In order to enable these 
+services, you may first need to change the entries in 
+<filename>/etc/xinetd.d</filename> (or <filename>/etc/inetd.conf</filename>). 
+Red Hat Linux 7.1 and later uses the new xinetd.d structure, in this case you need 
+to change the lines in <filename>/etc/xinetd.d/telnet</filename> 
+and <filename>/etc/xinetd.d/wu-ftp</filename> from 
+</para>
+
+<para><programlisting>
+	enable = no
+</programlisting>
+to:
+<programlisting>
+	enable = yes
+</programlisting></para>
+
+<para>	
+For ftp services to work properly, you will also need to either 
+have individual directories for the domain users already present on 
+the server, or change the home directory template to a general
+directory for all domain users. These can be easily set using 
+the &smb.conf; global entry 
+<smbconfoption><name>template homedir</name></smbconfoption>.
+</para>
+
+<note>
+	<para>The directory in <smbconfoption><name>template homedir</name></smbconfoption> is not created automatically! Use pam_mkhomedir or pre-create 
+		the directories of users to make sure users can log in on UNIX with 
+		their own home directory.
+	</para>
+</note>
+
+<para>
+The <filename>/etc/pam.d/ftp</filename> file can be changed 
+to allow Winbind ftp access in a manner similar to the
+samba file. My <filename>/etc/pam.d/ftp</filename> file was 
+changed to look like this:
+</para>
+
+<para><smbfile name="pam.ftp.winbind"><programlisting>
+auth       required     /lib/security/pam_listfile.so item=user sense=deny \
+	 file=/etc/ftpusers onerr=succeed
+auth       sufficient   /lib/security/pam_winbind.so
+auth       required     /lib/security/pam_stack.so service=system-auth
+auth       required     /lib/security/pam_shells.so
+account    sufficient   /lib/security/pam_winbind.so
+account    required     /lib/security/pam_stack.so service=system-auth
+session    required     /lib/security/pam_stack.so service=system-auth
+</programlisting></smbfile></para>
+
+<para>
+The <filename>/etc/pam.d/login</filename> file can be changed nearly the 
+same way. It now looks like this:
+</para>
+
+<para><smbfile name="pam.login.winbind"><programlisting>
+auth       required     /lib/security/pam_securetty.so
+auth       sufficient   /lib/security/pam_winbind.so
+auth       sufficient   /lib/security/pam_unix.so use_first_pass
+auth       required     /lib/security/pam_stack.so service=system-auth
+auth       required     /lib/security/pam_nologin.so
+account    sufficient   /lib/security/pam_winbind.so
+account    required     /lib/security/pam_stack.so service=system-auth
+password   required     /lib/security/pam_stack.so service=system-auth
+session    required     /lib/security/pam_stack.so service=system-auth
+session    optional     /lib/security/pam_console.so
+</programlisting></smbfile></para>
+
+<para>
+In this case, I added the <programlisting>auth sufficient /lib/security/pam_winbind.so</programlisting> 
+lines as before, but also added the <programlisting>required pam_securetty.so</programlisting>
+above it, to disallow root logins over the network. I also added a 
+<programlisting>sufficient /lib/security/pam_unix.so use_first_pass</programlisting>
+line after the <command>winbind.so</command> line to get rid of annoying 
+double prompts for passwords.
+</para>
+
+</sect4>
+
+<sect4>
+<title>Solaris-specific configuration</title>
+
+<para>
+The <filename>/etc/pam.conf</filename> needs to be changed. I changed this file so my Domain
+users can logon both locally as well as telnet. The following are the changes
+that I made. You can customize the <filename>pam.conf</filename> file as per your requirements, but
+be sure of those changes because in the worst case it will leave your system
+nearly impossible to boot.
+</para>
+
+<para><programlisting>
+#
+#ident "@(#)pam.conf 1.14 99/09/16 SMI"
+#
+# Copyright (c) 1996-1999, Sun Microsystems, Inc.
+# All Rights Reserved.
+#
+# PAM configuration
+#
+# Authentication management
+#
+login   auth required   /usr/lib/security/pam_winbind.so
+login auth required  /usr/lib/security/$ISA/pam_unix.so.1 try_first_pass 
+login auth required  /usr/lib/security/$ISA/pam_dial_auth.so.1 try_first_pass 
+#
+rlogin  auth sufficient /usr/lib/security/pam_winbind.so
+rlogin  auth sufficient /usr/lib/security/$ISA/pam_rhosts_auth.so.1
+rlogin auth required  /usr/lib/security/$ISA/pam_unix.so.1 try_first_pass
+#
+dtlogin auth sufficient /usr/lib/security/pam_winbind.so
+dtlogin auth required  /usr/lib/security/$ISA/pam_unix.so.1 try_first_pass
+#
+rsh auth required /usr/lib/security/$ISA/pam_rhosts_auth.so.1
+other   auth sufficient /usr/lib/security/pam_winbind.so
+other auth required /usr/lib/security/$ISA/pam_unix.so.1 try_first_pass
+#
+# Account management
+#
+login   account sufficient      /usr/lib/security/pam_winbind.so
+login account requisite /usr/lib/security/$ISA/pam_roles.so.1 
+login account required /usr/lib/security/$ISA/pam_unix.so.1 
+#
+dtlogin account sufficient      /usr/lib/security/pam_winbind.so
+dtlogin account requisite /usr/lib/security/$ISA/pam_roles.so.1 
+dtlogin account required /usr/lib/security/$ISA/pam_unix.so.1 
+#
+other   account sufficient      /usr/lib/security/pam_winbind.so
+other account requisite /usr/lib/security/$ISA/pam_roles.so.1 
+other account required /usr/lib/security/$ISA/pam_unix.so.1 
+#
+# Session management
+#
+other session required /usr/lib/security/$ISA/pam_unix.so.1 
+#
+# Password management
+#
+#other   password sufficient     /usr/lib/security/pam_winbind.so
+other password required /usr/lib/security/$ISA/pam_unix.so.1 
+dtsession auth required /usr/lib/security/$ISA/pam_unix.so.1
+#
+# Support for Kerberos V5 authentication (uncomment to use Kerberos)
+#
+#rlogin auth optional /usr/lib/security/$ISA/pam_krb5.so.1 try_first_pass
+#login auth optional /usr/lib/security/$ISA/pam_krb5.so.1 try_first_pass
+#dtlogin auth optional /usr/lib/security/$ISA/pam_krb5.so.1 try_first_pass
+#other auth optional /usr/lib/security/$ISA/pam_krb5.so.1 try_first_pass
+#dtlogin account optional /usr/lib/security/$ISA/pam_krb5.so.1
+#other account optional /usr/lib/security/$ISA/pam_krb5.so.1
+#other session optional /usr/lib/security/$ISA/pam_krb5.so.1
+#other password optional /usr/lib/security/$ISA/pam_krb5.so.1 try_first_pass
+</programlisting></para>
+
+<para>
+I also added a <parameter>try_first_pass</parameter> line after the <filename>winbind.so</filename>
+line to get rid of annoying double prompts for passwords.
+</para>
+
+<para>
+Now restart your Samba and try connecting through your application that you
+configured in the pam.conf.
+</para>
+
+</sect4>
+
+</sect3>
+
+</sect2>
+
+</sect1>
+
+<sect1>
+<title>Conclusion</title>
+
+<para>The Winbind system, through the use of the Name Service 
+Switch, Pluggable Authentication Modules, and appropriate 
+Microsoft RPC calls have allowed us to provide seamless 
+integration of Microsoft Windows NT domain users on a
+UNIX system. The result is a great reduction in the administrative 
+cost of running a mixed UNIX and NT network.</para>
+	
+</sect1>
+
+<sect1>
+<title>Common Errors</title>
+	
+	<para>Winbind has a number of limitations in its current 
+	released version that we hope to overcome in future 
+	releases:</para>
+
+	<itemizedlist>
+		<listitem><para>Winbind is currently only available for 
+		the Linux, Solaris, AIX, and IRIX operating systems, although ports to other operating 
+		systems are certainly possible. For such ports to be feasible, 
+		we require the C library of the target operating system to 
+		support the Name Service Switch and Pluggable Authentication
+		Modules systems. This is becoming more common as NSS and 
+		PAM gain support among UNIX vendors.</para></listitem>
+		
+		<listitem><para>The mappings of Windows NT RIDs to UNIX IDs 
+		is not made algorithmically and depends on the order in which 
+		unmapped users or groups are seen by Winbind. It may be difficult 
+		to recover the mappings of RID to UNIX ID mapping if the file 
+		containing this information is corrupted or destroyed.</para>
+		</listitem>
+		
+		<listitem><para>Currently the Winbind PAM module does not take 
+		into account possible workstation and logon time restrictions 
+		that may be set for Windows NT users, this is
+		instead up to the PDC to enforce.</para></listitem>
+	</itemizedlist>
+
+	<sect2>
+	<title>NSCD Problem Warning</title>
+
+	<?latex \nopagebreak ?>
+
+	<warning><para>
+	Do not under any circumstances run <command>nscd</command> on any system
+	on which <command>winbindd</command> is running.
+	</para></warning>
+
+	<para>
+	If <command>nscd</command> is running on the UNIX/Linux system, then
+	even though NSSWITCH is correctly configured it will not be possible to resolve
+	domain users and groups for file and directory controls.
+	</para>
+
+	</sect2>
+
+	<sect2>
+	<title>Winbind Is Not Resolving Users and Groups</title>
+
+	<para><quote>
+	My &smb.conf; file is correctly configured. I have specified 
+	<smbconfoption><name>idmap uid</name><value>12000</value></smbconfoption>, 
+	and <smbconfoption><name>idmap gid</name><value>3000-3500</value></smbconfoption>
+	and <command>winbind</command> is running. When I do the following it all works fine.
+	</quote></para>
+
+<para><screen>
+&rootprompt;<userinput>wbinfo -u</userinput>
+MIDEARTH+maryo
+MIDEARTH+jackb
+MIDEARTH+ameds
+...
+MIDEARTH+root
+
+&rootprompt;<userinput>wbinfo -g</userinput>
+MIDEARTH+Domain Users
+MIDEARTH+Domain Admins
+MIDEARTH+Domain Guests
+...
+MIDEARTH+Accounts
+
+&rootprompt;<userinput>getent passwd</userinput>
+root:x:0:0:root:/root:/bin/bash
+bin:x:1:1:bin:/bin:/bin/bash
+...
+maryo:x:15000:15003:Mary Orville:/home/MIDEARTH/maryo:/bin/false
+</screen></para>
+
+<para><quote>
+But the following command just fails:
+<screen>
+&rootprompt;<userinput>chown maryo a_file</userinput>
+chown: `maryo': invalid user
+</screen>
+This is driving me nuts! What can be wrong?
+</quote></para>
+
+<para>
+Same problem as the one above.
+Your system is likely running <command>nscd</command>, the name service
+caching daemon. Shut it down, do not restart it! You will find your problem resolved.
+</para>
+
+</sect2>
+</sect1>
+
+</chapter>