Book Image

Mastering Active Directory. - Second Edition

By : Dishan Francis
Book Image

Mastering Active Directory. - Second Edition

By: Dishan Francis

Overview of this book

Active Directory (AD) is a centralized and standardized system that automates networked management of user data, security, and distributed resources and enables inter-operation with other directories. This book will first help you brush up on the AD architecture and fundamentals, before guiding you through core components, such as sites, trust relationships, objects, and attributes. You will then explore AD schemas, LDAP, RMS, and security best practices to understand objects and components and how they can be used effectively. Next, the book will provide extensive coverage of AD Domain Services and Federation Services for Windows Server 2016, and help you explore their new features. Furthermore, you will learn to manage your identity infrastructure for a hybrid cloud setup. All this will help you design, plan, deploy, manage operations, and troubleshoot your enterprise identity infrastructure in a secure and effective manner. You’ll later discover Azure AD Module, and learn to automate administrative tasks using PowerShell cmdlets. All along, this updated second edition will cover content based on the latest version of Active Directory, PowerShell 5.1 and LDAP. By the end of this book, you’ll be well versed with best practices and troubleshooting techniques for improving security and performance in identity infrastructures.
Table of Contents (25 chapters)
Free Chapter
1
Section 1: Active Directory Planning, Design, and Installation
8
Section 2: Active Directory Administration
13
Section 3: Active Directory Service Management
18
Section 4: Best Practices and Troubleshooting

Time-based group memberships

In the previous section, I explored PAM features in the new AD DS 2016. Time-based group membership is a part of that broader topic. It allows administrators to assign temporary group membership, which is expressed by a TTL value. This value will be added to the Kerberos ticket. It is also called the expiring links feature. When a user is assigned to a temporary group membership, their login Kerberos ticket-granting ticket (TGT) lifetime will be equal to the lowest TTL value they have. For example, let's assume that you grant temporary group membership to user A to be a member of the Domain Admin group. It is only valid for 60 minutes. But the user logs in 50 minutes after the original assignment and only has 10 minutes left as a member of the Domain Admin group. Based on this, the domain controller will issue a TGT that is only valid for 10 minutes...