FREN
Advanced Linux and Windows Server system administration. High availability, virtualisation, automation and kernel optimisation for infrastructures that never sleep.
From Debian to Red Hat, we manage large-scale Linux fleets with kernel-level expertise.
Reference distributions for production servers. Advanced APT package management, Netplan network configuration, systemd, LVM and software RAID.
Enterprise Linux for critical environments. SELinux, Subscription Manager, RPM packaging, STIG compliance and long-term support (10 years).
Advanced sysctl parameter optimisation, CPU scheduling, memory management, I/O scheduling and networking stack. Custom kernel compilation for specific workloads.
Active Directory, GPO, Exchange, SCCM — we master the entire Microsoft server ecosystem.
Multi-domain and multi-forest architecture. Advanced GPOs, administration delegation, LAPS, tiering model and hardening following ANSSI recommendations.
Installation, hardening and maintenance of Windows Server 2019/2022. Hyper-V, failover clustering, Storage Spaces Direct (S2D) and Windows Admin Center.
On-premise and hybrid Exchange messaging. Migration to Microsoft 365, Exchange Online configuration, DLP, retention and compliance archiving.
Infrastructure virtualisation to optimise your resources and simplify environment management.
ESXi hypervisor, vCenter Server, vSAN, NSX-T and vRealize. High availability clusters, DRS, templates and automation with PowerCLI.
Open-source virtualisation platform combining KVM and LXC. Integrated web interface, clustering, Ceph storage and PBS backup. Performant VMware alternative.
NAS/SAN solutions with TrueNAS, Ceph and GlusterFS. 3-2-1 backup strategies with Veeam, Restic or Borg. Documented and regularly tested DRP/BCP.
Automate repetitive tasks, reduce human errors and accelerate your daily operations.
Advanced scripting for the Windows and Azure ecosystem. DSC modules, bulk AD management, automated reporting and integration with Microsoft Graph APIs.
Robust Linux administration scripts. Cron jobs, custom monitoring, log rotation, automated deployment and integration with systemd and journald.
Configuration management and server fleet orchestration. Idempotent playbooks, Galaxy roles and AWX/Tower for centralised multi-team management.
No IS monitoring: outages discovered only after client impact, zero server metrics available, entirely reactive operations.
Full Zabbix deployment and configuration: server probes, SNMP network monitoring, real-time business dashboards, multi-channel alerts (email, SMS, webhook). Proactive 24/7 supervision live in production.
Proactive incident detection, improved overall stability and intervention before user impact.
Free infrastructure audit. We analyse your fleet and propose concrete optimisations.
Infrastructure audit