Professional engagement · luxury
Active Directory Tier 0: cutting lateral movement
Mandatory SMB signing on more than 2,000 Windows servers.
- 2 000+
- Windows servers moved to mandatory SMB signing
- Tier 0
- most critical accounts and servers
Fig. P–05The challenge
A critical Active Directory estate where SMB signing was not enforced, leaving the door open to NTLM relay and lateral movement.
What I did
- SMB signing audit across the Windows server fleet
- Remediation led to enforce it across the fleet
- Tier 0 hardening: GPO, DNS and PKI
- Risk analysis and coordination with security and operations teams
Results
- Mandatory SMB signing on more than 2,000 Windows servers
- A smaller lateral-movement surface across Active Directory
What it can bring you
Active Directory hardening carried out across thousands of servers, coordinated with the teams that run them.
Related expertise · Identity & secure infrastructure
What you get
- Prioritised audit remediation plan
- Conditional Access tested, then enforced
- PIM and privileged accounts under control
- Documented Tier 0 hardening
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Until 31 December 2026
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From January 2027
Full-time freelance, 5 days a week.
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