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

Secure Boot - Certificates Update - Field Notes

Practical field notes to the Secure Boot cert update for Windows admins

David Horák

FREE

ThreatLog

Stop Wasting Resources. Audit What Matters.

David Horák

FREE

FREE COURSES

Active Directory - Kerberos

Master Kerberos Authentication and Prevent Credential Theft

David Horák

FREE

Windows - Stealing Credentials

See How Attackers Steal Credentials—So You Can Stop Them

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