Active Directory trusts enable cross-domain access, but poorly secured trusts can turn one breach into a full forest compromise. Attackers exploit transitive trusts, foreign security principals, Kerberos delegation flaws, and legacy connections. Learn how to lock down trusts with SID filtering, selective authentication, audits, and KRBTGT rotation to stop lateral movement and protect your enterprise.

Active Directory functional levels control which features are available in your domain and forest, and running on outdated levels leaves security capabilities on the table. Here's what each level unlocks and why it matters for your environment.

Duplicate SPN Active Directory issues cause Kerberos authentication to fall back to NTLM, a weaker protocol vulnerable to relay attacks, pass-the-hash, and brute force cracking. Finding and removing duplicate SPNs is a straightforward fix that most environments overlook entirely. What is a Service Principal Name? Service principal names (SPN) is used by Kerberos to link a service to a service account. This allows a user to access a service without knowing the service account