Technical solutions and approaches from real projects.
Two locations as one L2 network (OpenVPN bridge per VLAN), dual-ISP with instant failover, security (Suricata, ipset, GeoIP, nftables, Fail2ban), KVM and a backup server that takes over in 15 minutes.
A client with 20+ web apps across 5 VMs and 2 dedicated servers, consolidated onto a single Debian server with KVM: 3 VMs, security with nginx + GeoIP + Suricata, Zabbix monitoring and image-level backup.
RAID10 array with 6 out of 10 disks offline and a crashed Oracle database. How we brought the controller back, rebuilt the array, and recovered the database from redo logs β zero critical data loss.
Why Debian remains the preferred Linux distribution for enterprise servers in 2026.
Which firewall fits SMB, mid-market or enterprise in 2026.
After Broadcom price hikes, many migrate. Step-by-step VMware β Proxmox VE migration guide.
How to secure a Linux Debian server in 2026 β CIS benchmark, fail2ban, GeoIP, CrowdSec.
How to implement backup and DR with Veeam B&R using the 3-2-1 strategy.
SD-WAN implementation with FortiGate: link load balancing, application steering, ZTNA, what it involves.
P2V conversion of physical Windows/Linux server to Hyper-V: phases, challenges, architectural decisions.
Enterprise firewall on Linux: nftables, GeoIP, IP reputation, fail2ban, NetFlow visibility.
Build a functional 24/7 SOC with Wazuh, Suricata and Grafana β open-source enterprise-grade stack.
HA reverse proxy layer design with HAProxy, Nginx, ModSecurity WAF, automatic SSL.
Why and how to implement self-hosted mail server with Postfix, Dovecot, Rspamd, DKIM/SPF/DMARC.
Complete monitoring stack: infrastructure, network, apps, business metrics, centralized logs.
Ansible implementation: playbooks, dynamic inventory, vault, AWX.