Chapter 5. Domain Control

Date: Sat, 14 Jun 2003 22:18:16 +0000 Subject: Updating html stuff. (This used to be commit ab1f2fe4a840c9603bf5da5c133c137542fe0319) --- docs/htmldocs/samba-pdc.html | 59 ++++++++++++++++++++++---------------------- 1 file changed, 30 insertions(+), 29 deletions(-) (limited to 'docs/htmldocs/samba-pdc.html') diff --git a/docs/htmldocs/samba-pdc.html b/docs/htmldocs/samba-pdc.html index 65c39d9399..ad9f024cce 100644 --- a/docs/htmldocs/samba-pdc.html +++ b/docs/htmldocs/samba-pdc.html @@ -1,8 +1,9 @@ -Chapter 5. Domain Control

Chapter 5. Domain Control
Prev	Part II. Server Configuration Basics	Next

Chapter 5. Domain Control

John H. Terpstra

Samba Team

<jht@samba.org>

Gerald (Jerry) Carter

Samba Team

<jerry@samba.org>

David Bannon

Samba Team

<dbannon@samba.org>

Table of Contents

Features and Benefits

Basics of Domain Control

Domain Controller Types
Preparing for Domain Control

Domain Control - Example Configuration

Samba ADS Domain Control

Domain and Network Logon Configuration

Domain Network Logon Service
Security Mode and Master Browsers

Common Problems and Errors

I cannot include a '$' in a machine name
I get told "You already have a connection to the Domain...." + +Chapter 5. Domain Control
Chapter 5. Domain Control
Prev Part II. Server Configuration Basics Next
Chapter 5. Domain Control
John H. Terpstra
Samba Team
<jht@samba.org>
Gerald (Jerry) Carter
Samba Team
<jerry@samba.org>
David Bannon
Samba Team
<dbannon@samba.org>
Table of Contents
Features and Benefits
Basics of Domain Control
Domain Controller Types
Preparing for Domain Control
Domain Control - Example Configuration
Samba ADS Domain Control
Domain and Network Logon Configuration
Domain Network Logon Service
Security Mode and Master Browsers
Common Problems and Errors
I cannot include a '$' in a machine name
I get told "You already have a connection to the Domain...." or "Cannot join domain, the credentials supplied conflict with an -existing set.." when creating a machine trust account.
The system can not log you on (C000019B)....
The machine trust account for this computer either does not -exist or is not accessible.
When I attempt to login to a Samba Domain from a NT4/W2K workstation, -I get a message about my account being disabled.
Until a few minutes after Samba has started, clients get the error "Domain Controller Unavailable"
The Essence of Learning: +existing set.." when creating a machine trust account.
The system can not log you on (C000019B)....
The machine trust account for this computer either does not +exist or is not accessible.
When I attempt to login to a Samba Domain from a NT4/W2K workstation, +I get a message about my account being disabled.
Until a few minutes after Samba has started, clients get the error "Domain Controller Unavailable"

The Essence of Learning: There are many who approach MS Windows networking with incredible misconceptions. That's OK, because it gives the rest of us plenty of opportunity to be of assistance. Those who really want help would be well advised to become familiar with information @@ -32,7 +33,7 @@ burden on an organisation. Where is the right place to make mistakes? Only out of harm's way! If you are going to make mistakes, then please do this on a test network, away from users and in such a way as to not inflict pain on others. Do your learning on a test network. -

Features and Benefits

What is the key benefit of Microsoft Domain security?

In a word, Single Sign On, or SSO for short. To many, this is the holy @@ -130,11 +131,11 @@ per user settings for many parameters, over-riding global settings given in the Thus, with samba-3 it is possible to have a default system configuration for profiles, and on a per user basis to over-ride this for those users who should not be subject to the default configuration. -

Basics of Domain Control

Over the years, public perceptions of what Domain Control really is has taken on an almost mystical nature. Before we branch into a brief overview of Domain Control, there are three basic types of domain controllers: -

Domain Controller Types

Primary Domain Controller
Backup Domain Controller
ADS Domain Controller

Domain Controller Types

Primary Domain Controller
Backup Domain Controller
ADS Domain Controller

The Primary Domain Controller or PDC plays an important role in the MS Windows NT4 and Windows 200x Domain Control architecture, but not in the manner that so many expect. There is folk lore that dictates that because of it's role in the MS Windows @@ -186,7 +187,7 @@ At this time any appearance that Samba-3 is capable of acting as an This functionality should not be used until the Samba-Team offers formal support for it. At such a time, the documentation will be revised to duly reflect all configuration and management requirements. -

Preparing for Domain Control

There are two ways that MS Windows machines may interact with each other, with other servers, and with Domain Controllers: Either as Stand-Alone systems, more commonly called Workgroup members, or as full participants in a security system, @@ -247,7 +248,7 @@ domain/workgroup. Local master browsers in the same domain/workgroup on broadcas then ask 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. -

Domain Control - Example Configuration

The first step in creating a working Samba PDC is to understand the parameters necessary in smb.conf. Here we attempt to explain the parameters that are covered in the smb.conf man page. @@ -301,20 +302,20 @@ Here is an example smb.conf for acting as a PDC: read only = no create mask = 0600 directory mask = 0700 -

Note

The above parameters make for a full set of parameters that may define the server's mode of operation. The following parameters are the essentials alone: -

+ 	workgroup = NARNIA
 	domain logons = Yes
 	domain master = Yes
 	security = User
-

+

The additional parameters shown in the longer listing above just makes for a more complete environment. -

There are a couple of points to emphasize in the above configuration.

Encrypted passwords must be enabled. For more details on how @@ -327,22 +328,22 @@ There are a couple of points to emphasize in the above configuration. client to locate the server as a DC. Please refer to the various Network Browsing documentation included with this distribution for details. -

Samba ADS Domain Control

Samba-3 is not and can not act as an Active Directory Server. It can not truly function as an Active Directory Primary Domain Controller. The protocols for some of the functionality the Active Directory Domain Controllers is have been partially implemented on an experimental only basis. Please do NOT expect Samba-3 to support these protocols - nor should you depend on any such functionality either now or in the future. The Samba-Team may well remove such experiemental features or may change their behaviour. -

Domain and Network Logon Configuration

The subject of Network or Domain Logons is discussed here because it rightly forms an integral part of the essential functionality that is provided by a Domain Controller. -

Domain Network Logon Service

All Domain Controllers must run the netlogon service (domain logons in Samba). One Domain Controller must be configured with domain master = Yes (the Primary Domain Controller); on ALL Backup Domain Controllers domain master = No must be set. -

Example Configuration

+
Example Configuration
 	[globals]
 		domain logons = Yes
 		domain master = (Yes on PDC, No on BDCs)
@@ -352,7 +353,7 @@ must be set.
 		path = /var/lib/samba/netlogon
 		guest ok = Yes
 		browseable = No
-
The Special Case of MS Windows XP Home Edition
Note

+

The Special Case of MS Windows XP Home Edition

Note

MS Windows XP Home Edition does not have the ability to join any type of Domain security facility. Unlike, MS Windows 9x / Me, MS Windows XP Home Edition also completely lacks the ability to log onto a network. @@ -364,7 +365,7 @@ MS Windows XP Professional.

Now that this has been said, please do NOT ask the mailing list, or email any of the Samba-Team members with your questions asking how to make this work. It can't be done. -

The Special Case of Windows 9x / Me

A domain and a workgroup are exactly the same thing in terms of network browsing. The difference is that a distributable authentication database is associated with a domain, for secure login access to a @@ -444,7 +445,7 @@ The main difference between a PDC and a Windows 9x logon server configuration is

A Samba PDC will act as a Windows 9x logon server; after all, it does provide the network logon services that MS Windows 9x / Me expect to find. -

Security Mode and Master Browsers

There are a few comments to make in order to tie up some loose ends. There has been much debate over the issue of whether or not it is ok to configure Samba as a Domain Controller in security @@ -478,7 +479,7 @@ Configuring a Samba box as a DC for a domain that already by definition has a PDC is asking for trouble. Therefore, you should always configure the Samba DC to be the DMB for its domain and set security = user. This is the only officially supported mode of operation. -

Common Problems and Errors

I cannot include a '$' in a machine name

Common Problems and Errors

I cannot include a '$' in a machine name

A 'machine account', (typically) stored in /etc/passwd, takes the form of the machine name with a '$' appended. FreeBSD (and other BSD systems?) won't create a user with a '$' in their name. @@ -486,7 +487,7 @@ systems?) won't create a user with a '$' in their name. The problem is only in the program used to make the entry. Once made, it works perfectly. Create a user without the '$'. Then use vipw to edit the entry, adding the '$'. Or create the whole entry with vipw if you like; make sure you use a unique User ID! -

I get told "You already have a connection to the Domain...." +

I get told "You already have a connection to the Domain...." or "Cannot join domain, the credentials supplied conflict with an existing set.." when creating a machine trust account.

This happens if you try to create a machine trust account from the @@ -500,7 +501,7 @@ Further, if the machine is already a 'member of a workgroup' that is the same name as the domain you are joining (bad idea) you will get this message. Change the workgroup name to something else, it does not matter what, reboot, and try again. -

The system can not log you on (C000019B)....

I joined the domain successfully but after upgrading +

The system can not log you on (C000019B)....

I joined the domain successfully but after upgrading to a newer version of the Samba code I get the message, The system can not log you on (C000019B), Please try again or consult your system administrator when attempting to logon. @@ -511,14 +512,14 @@ the domain name and/or the server name (NetBIOS name) is changed. The only way to correct the problem is to restore the original domain SID or remove the domain client from the domain and rejoin. The domain SID may be reset using either the net or rpcclient utilities. -

The reset or change the domain SID you can use the net command as follows: -

 root# net getlocalsid 'OLDNAME'
 root# net setlocalsid 'SID'
-

The machine trust account for this computer either does not + +

The machine trust account for this computer either does not exist or is not accessible.

When I try to join the domain I get the message The machine account for this computer either does not exist or is not accessible. What's @@ -541,10 +542,10 @@ Some people have also reported that inconsistent subnet masks between the Samba server and the NT client can cause this problem. Make sure that these are consistent for both client and server. -

When I attempt to login to a Samba Domain from a NT4/W2K workstation, +

When I attempt to login to a Samba Domain from a NT4/W2K workstation, I get a message about my account being disabled.

Enable the user accounts with smbpasswd -e username, this is normally done as an account is created. -

Until a few minutes after Samba has started, clients get the error "Domain Controller Unavailable"

A domain controller has to announce on the network who it is. This usually takes a while.

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