mail us  |  mail this page

contact us
training  | 
tech stuff  | 

Chapter 5. OpenLDAP Samples

5.5 Single Sign On


5.1 Simple Directory

5.1.1 Designing the DIT
5.1.2 Select the STRUCTURAL objectClass
5.1.3 slapd.conf File
5.1.4 LDIF File
5.1.5 Loading the LDIF
5.1.6 Adding New Entries using LDIF
5.1.7 Modifying Entries using LDIF
5.1.8 Just Fooling Around

5.2 Securing the Directory

5.2.1 Security Policy
5.2.2 Adding Groups
5.2.3 ACL slapd.conf Access Definitions
5.2.4 Testing the ACL

5.3 Expanded Hierarchy

5.3.1 Requirement
5.3.2 Implementation
5.3.3 LDIF
5.3.4 ACL slapd.conf Access Definitions
5.3.5 Testing the ACL

5.4 Creating & Adding Objects

5.4.1 Requirement
5.4.2 Implementation
5.4.3 Attribute Definitions
5.4.4 objectClass & Schema Definition
5.4.5 ACL slapd.conf Access Definitions
5.4.6 LDIF
5.4.7 Testing the Changes

5.5 Single Sign On
5.6 Referral and Replication

5.5 Single Sign-On (SSO)

This chapter sets out to explore the holy grail of Single Sign On (SSO) capabilities in *nix systems and networks using OpenLDAP. The following matrix looks at the potential scope of SSO and whether it is either possible or desirable to provide SSO:

Function Account How OS Notes
System Unix
Linux, FBSD5.x Access to Server facilities via logon (local or remote). FreeBSD 4.x does not support pam/NSS for system logon and hence it is not possible to use SSO for this function.
mail App courier-native Any Access to email - local and virtual users
ftp App ProFTP
Any Access to private (non-anonymous) ftp services
network Unix Samba3 Any Access to network resources from Windows or OS desktops using either an NT or Samba (NT style) PDC. Requires Unix account.
web App Apache
Any Access to Intranet or private web services for example WEBDAV


Functional Requirement

We define the functional requirement for a single sign on (SSO) system which on its face may seem obvious but ...

Note: The OpenGroup consortium has an excellent introduction to this topic as part of its XSSO specification.

  1. A single user password to control access to all features allowed for the user or group of users. This does not necessarily imply that a single user password will allow access to all services but that the LDAP location where one or more passwords may be stored is accessible via single password. The user sees single sign-on even if different passwords are fed to different applications or sub-systems.

  2. A single location for administrators to control/define access to allowed features for each user or group of users.

  3. The ability to create, modify or delete users and user access rights.

One day real soon now™.

under construction

Up Arrow

Step 6 - Referral and Replication

Go to Arrow

Problems, comments, suggestions, corrections (including broken links) or something to add? Please take the time from a busy life to 'mail us' (at top of screen), the webmaster (below) or info-support at zytrax. You will have a warm inner glow for the rest of the day.


tech info
guides home
1 objectives
big picture
2 concepts
3 ldap objects
4 install ldap
5 samples
6 configuration
7 replica & refer
8 ldif
9 protocol
10 ldap api
11 howtos
12 trouble
13 performance
14 ldap tools
15 security
notes & info
ldap resources
rfc's & x.500
ldap objects
change log

Creative Commons License
This work is licensed under a Creative Commons License.

If you are happy it's OK - but your browser is giving a less than optimal experience on our site. You could, at no charge, upgrade to a W3C STANDARDS COMPLIANT browser such as Firefox




Icons made by Icomoon from is licensed by CC 3.0 BY
share page via facebook tweet this page


email us Send to a friend feature print this page Display full width page Decrease font size Increase font size



Debian Linux


GNU-Free SW Foundation


Open Source Initiative
Creative Commons


Ibiblio - Library
Open Book Project
Open Directory


CSS Technology SPF Record Conformant Domain
Copyright © 1994 - 2018 ZyTrax, Inc.
All rights reserved. Legal and Privacy
site by zytrax
Hosted by
web-master at zytrax
Page modified: October 21 2015.