Operational Services

Hardening & Secure Configuration

Apply proven security baselines (CIS, ANSSI) to durably reduce your attack surface

Why harden your systems?

Most compromises exploit default or overly permissive configurations. Hardening consists of applying secure, recognized and documented configuration baselines to reduce the attack surface without disrupting your operations.

From audit to hardening

Hardening complements our configuration audit: the audit identifies gaps against best practices, while hardening applies and maintains the security baselines over time.

Discover our configuration audit →

The baselines we apply

We rely on the industry's recognized frameworks

CIS Benchmarks

Configuration baselines from the Center for Internet Security

ANSSI

ANSSI hardening guides and recommendations

Microsoft

Security Baselines (Windows, Microsoft 365, Azure)

DISA STIG

Security Technical Implementation Guides

NIST

Secure configuration recommendations

Our hardening scopes

Workstations & servers

✓Windows 10/11 and Windows Server
✓Linux (RHEL, Ubuntu, Debian)
✓macOS
✓Application of CIS / ANSSI baselines via GPO and scripts
✓Hardened golden images

Active Directory & Entra ID

✓AD hardening and tiering model
✓Privileged account security
✓Conditional access and MFA
✓Entra ID (Azure AD) hardening

Microsoft 365 & Azure

✓Application of Microsoft Security Baselines
✓Hardening of M365 tenants and Exchange Online
✓Azure RBAC, IAM and Microsoft Defender
✓Secure-by-default configuration

Network & containers

✓Firewalls, switches, routers and Wi-Fi
✓VPN and remote access
✓Containers and Kubernetes
✓Databases and web services (Apache, Nginx, IIS)

Our hardening approach

Scoping & baseline selection

Selection of the appropriate framework (CIS, ANSSI) based on your context and business constraints.

Current-state assessment

Measurement of the gap between your current configurations and the target baseline.

Hardening application

Implementation of recommendations (GPO, scripts, baselines), in controlled batches.

Testing & non-regression

Verification that your applications and business services remain fully functional.

Security maintenance

Baseline documentation, configuration drift monitoring and updates over time.

Reduce your attack surface

Have your systems hardened to the best security baselines by our experts.