Open Source Administration on Active Directory

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This course provides the knowledge and practical skills needed to deploy, administer, secure, and troubleshoot an Active Directory environment using open-source technologies. It focuses on Samba Active Directory Domain Controllers, Linux integration, centralized identity management, authentication, and domain-based resource access.

Participants learn to manage directory objects, configure supporting DNS and Kerberos services, integrate Windows and Linux clients, administer permissions, and maintain service availability. The course concludes with a capstone that brings these skills together in a representative organizational environment.

 

Duration 5 Days – 35 hrs. 

 

Objectives

  • Explain Active Directory concepts and the role of Samba in an open-source directory environment.
  • Prepare Linux servers for Samba Active Directory deployment.
  • Provision and configure a Samba Active Directory Domain Controller.
  • Administer users, groups, organizational units, and computer accounts.
  • Configure and troubleshoot DNS, Kerberos, and time synchronization.
  • Join Windows and Linux systems to the domain.
  • Manage domain-based file access and permissions on a Samba member server.
  • Apply supported Group Policy settings and administrative delegation.
  • Implement security controls, backup procedures, and recovery practices.
  • Diagnose common authentication, connectivity, and replication issues.

 

Target Audience 

  • Linux and Windows system administrators.
  • Network administrators and infrastructure engineers.
  • IT support personnel responsible for user accounts and access management.
  • Technical professionals managing mixed Windows and Linux environments.
  • IT professionals implementing open-source directory services.

 

Prerequisites 

  • Basic Linux administration skills, including command-line operations, file permissions, and service management.
  • Familiarity with Windows workstation administration.
  • Understanding of TCP/IP networking, IP addressing, DNS, and hostnames.
  • Basic knowledge of users, groups, authentication, and access permissions.
  • Familiarity with virtual machines or access to a suitable virtual lab environment.

  

 

Course Outline 

Day 1: Directory Fundamentals and Server Preparation

Module 1: Introduction to Open-Source Active Directory Administration

  • Active Directory purpose and architecture.
  • Domains, forests, organizational units, and directory objects.
  • Samba domain controller and member server roles.
  • LDAP, Kerberos, DNS, and SMB fundamentals.
  • Open-source integration with Microsoft Active Directory.
  • Compatibility considerations and deployment limitations.

 Module 2: Planning and Preparing the Environment

  • Domain naming and DNS namespace planning.
  • Server sizing and network requirements.
  • Linux installation and package preparation.
  • Static IP addressing, hostnames, and name resolution.
  • Time synchronization requirements.
  • Lab topology and administrative access preparation.

  

Day 2: Domain Controller Deployment and Directory Administration

Module 3: Deploying a Samba Active Directory Domain Controller

  • Installing Samba and supporting utilities.
  • Provisioning a new domain and Kerberos realm.
  • Configuring DNS and service startup.
  • Understanding Samba configuration and directory locations.
  • Verifying DNS records, Kerberos authentication, and domain services.
  • Initial deployment troubleshooting.

 Module 4: Managing Directory Objects

  • Using samba-tool for routine administration.
  • Creating and maintaining user accounts.
  • Managing security groups and memberships.
  • Organizing objects with organizational units.
  • Managing computer accounts.
  • Configuring password policies and account restrictions.
  • Using compatible Windows Remote Server Administration Tools.

  

Day 3: Client Integration and Resource Access

Module 5: Integrating Windows and Linux Clients

  • Preparing clients for domain membership.
  • Joining Windows workstations to the domain.
  • Integrating Linux clients using realmd and SSSD.
  • Understanding Winbind-based integration.
  • Configuring identity resolution and domain logins.
  • Managing home directory creation and login access.
  • Troubleshooting domain joins and authentication.

 Module 6: Administering Domain-Based File Services

  • Preparing a dedicated Samba domain member server.
  • Configuring domain membership and identity mapping.
  • Creating SMB shares.
  • Managing Linux permissions and Windows access control lists.
  • Assigning access through domain security groups.
  • Validating access from Windows and Linux clients.
  • Resolving common file access and permission issues.

  

Day 4: Policy, Security, and Operational Maintenance

Module 7: Group Policy and Administrative Delegation

  • Group Policy concepts and management tools.
  • Creating and linking Group Policy Objects.
  • Applying supported Windows client settings.
  • Understanding SYSVOL and policy distribution.
  • Group Policy scope, inheritance, and filtering.
  • Delegating routine directory administration.
  • Troubleshooting policy application.

 Module 8: Securing and Maintaining the Environment

  • Applying least-privilege administrative practices.
  • Separating privileged and routine user accounts.
  • Configuring firewall access for required services.
  • Securing LDAP communications and managing certificates.
  • Reviewing authentication and administrative logs.
  • Planning updates and configuration changes.
  • Automating routine tasks with shell scripts and Samba utilities.

  

Day 5: Availability, Recovery, and Capstone

Module 9: Replication, Backup, Recovery, and Troubleshooting

  • Adding an additional Samba domain controller.
  • Understanding directory replication and FSMO roles.
  • Checking replication health and DNS consistency.
  • Understanding SYSVOL replication considerations.
  • Creating and protecting domain backups.
  • Planning and practicing domain recovery in an isolated environment.
  • Diagnosing DNS, Kerberos, time synchronization, and directory issues.
  • Preparing operational documentation and recovery procedures.

 Module 10: Capstone — Deploying an Open-Source Directory Environment

  • Deploy a Samba Active Directory domain for a sample organization.
  • Create departmental organizational units, users, and security groups.
  • Join Windows and Linux clients to the domain.
  • Configure a separate member server for departmental file shares.
  • Apply group-based permissions and supported client policies.
  • Configure an additional domain controller and check replication.
  • Establish a backup procedure and document recovery steps.
  • Resolve a representative authentication or resource access issue.
  • Produce a concise administration and maintenance guide.

 

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