FREE SECURITY RESOURCES

Active Directory - Network Ports

Quickly identify the right ports to open between AD components.

David Horák

FREE

Windows Infrastructure Security Guides

Get hands-on security guides for real-world AD challenges

David Horák

FREE

Learning Path - Windows Cybersecurity

From IT support to Security Engineer—follow the same path I took

David Horák

FREE

ADProbe - Vulnerability Script

Scan your AD for real risks—vulnerabilities, misconfigs, and exposure points

David Horák

FREE

ThreatLog

Stop Wasting Resources. Audit What Matters.

David Horák

FREE

FREE COURSES

Windows - Stealing Credentials

See How Attackers Steal Credentials—So You Can Stop Them

David Horák

FREE

Active Directory - Kerberos

Master Kerberos Authentication and Prevent Credential Theft

David Horák

FREE

Active Directory - Tiering Model

Segment and Secure AD Privileges to Prevent Escalation

David Horák

FREE

Active Directory - Password Policies

Master Password Policies in Active Directory

David Horák

FREE

Active Directory - Service Accounts

Master Service Accounts in Active Directory

David Horák

FREE

Active Directory - Protected Users Group

Learn how to protect high-value admin accounts in Active Directory using the Protected Users group—what it does, how to deploy it safely, and what attacks it blocks.

David Horák

FREE

Active Directory - Advanced Auditing

Learn how to audit your Windows & AD environment properly using real-world techniques and tools — without flooding your SIEM with noise.

David Horák

FREE