Debian Server specialist. Only infrastructure. Linux, VMware vCenter, Hyper-V, FortiGate, Mikrotik, backup & monitoring 24/7. We don't waste time on PCs or printers. We build, secure and maintain the infrastructure that keeps your business running. 50+ servers · 1000+ VMs · 20+ firewalls in production.
From firewall to Kubernetes, from daily backups to 24/7 SOC: the entire server-side tech stack under a single partner who speaks the same technical language as your team. Everything you need to keep your infrastructure alive 24/7.
Linux servers that run for years without you touching them. Debian Server as standard, complete hardening, 24/7 monitoring, automatic backup. You focus on business.
We secure your network perimeter with Fortinet enterprise or open-source solutions. 20+ firewalls in production, zero breach in 5 years.
VMware vCenter clusters with real HA, vSAN hyperconverged, NSX-T microsegmentation. Post-Broadcom migrations to Proxmox with 60-90% savings.
Hyper-V Failover Cluster or Storage Spaces Direct hyperconverged. Clean P2V migrations, cross-site replication, native Veeam integration.
Backup that works at restore. 3-2-1-1-0 strategy: ransomware-proof immutable backups, monthly restore tests, RTO/RPO documented per application.
Production-grade K8s cluster: self-hosted or managed (EKS/AKS/GKE). GitOps with ArgoCD, secrets in Vault, complete observability, strict RBAC.
Complete infrastructure monitoring stack: Nagios, Check_MK, Zabbix, Grafana, Prometheus, Loki.
We build applications that actually deliver value: BI dashboards, ERP integrations, AI chatbots, ETL automation. Working on your code, handed over clean.
A few real examples from recent projects. The numbers speak.
200 VMs consolidated on Proxmox VE 8.x cluster with Ceph hyperconverged. Staged migration over 6 nights, zero production downtime. Licensing: optional Enterprise Subscription (~€110-1000/CPU/year for stable repo + official support); otherwise free community edition.
Audit + network redesign for 20 branches. FortiGuard threat intelligence + GeoIP filtering. ROI achieved in 8 months via downtime reduction.
Veeam B&R + Immutable Hardened Repository + cross-site replication Cluj-Bucuresti. Monthly automated restore test. ISO 27001 audit passed first attempt.
Aging hardware consolidation on Windows Failover Cluster with Storage Spaces Direct hyperconverged. Veeam B&R with automated monthly restore test. RTO 30 min vs hours for physical. Zero-downtime Live Migration for monthly patching.
Datacenter administration with VMware vCenter cluster, 20+ ESXi hosts, VMware Cloud Director for multi-tenant self-service, NetApp storage with synchronous replication, Veeam B&R backup with offline tape archive.
Debian Server CIS hardened + Lynis pass, KVM virtualization on LVM thin-provisioning, nftables firewall with GeoIP filtering (block CN/RU/KP), Suricata IPS inline with Emerging Threats, CrowdSec community blocklist auto-updated daily. Complete Wazuh SIEM monitoring.
200 mailbox migration + 8 years archive. Postfix MTA + Dovecot IMAP with Rspamd anti-spam, validated DKIM/SPF/DMARC, Roundcube webmail. Costs cut from €18k/year to €2.5k/year. Data 100% in Romania, GDPR-compliant.
Reverse proxy cluster with HAProxy keepalived + Nginx + ModSecurity WAF. L7 anti-DDoS, GeoIP filtering, IP reputation lists (CrowdSec). Automatic Let''s Encrypt SSL for 47 domains. 99.99% uptime in the last 18 months.
Complete infrastructure hardening (CIS Benchmarks), Wazuh SIEM + Suricata IDS/IPS, 2-year log retention, incident response procedures, team training, complete auditor documentation. NIS2 + ISO 27001 compliant.
Higher education institution · failed RAID10 array + crashed Oracle DB. Rebuilt array without disk replacement, recovered DB from redo logs. Extra cost: €0 new hardware. Read full case study →
Full case studies and a technical guide with real commands — not marketing, exactly what we deploy in production.
MikroTik router with GeoIP and dynamic lists that block any attack for 60 min, Hyper-V with SAGA + a Linux monitoring server and OpenVPN with 2FA, backup and replication on the old server, all monitored 24/7. Read the full case study →
Two Dell R7615 servers (AMD, 384 GB) in a VMware vSAN cluster, witness on a third ESXi, 25G VLT network and jumbo frames. If a node fails, everything stays up. Read the full case study →
Agents on endpoints and servers, file integrity, log collection for audit, vulnerability detection and automatic response to brute-force — the open-source XDR/SIEM platform. Read the full case study →
We are not tied to any vendor, so we choose together what fits your infrastructure. We know all these technologies and use them daily in production. You pay for results, not for unnecessary licenses.
→ See our full experience and portfolio (FortiGate, SIEM, backup, 24/7 SOC)
Cyber Immunity does not sell generic solutions. Each project is individual engineering: we analyze the context, choose the right technology, write the documentation, implement and hand everything over to the client in detail.
We work directly with your CTOs, internal sysadmins and DevOps teams. We integrate, we don't replace. We speak the same technical language, without unnecessary abstractions and without vendor PowerPoints.
We respond within 4 business hours max. For SOC emergencies, call directly — available 24/7.