The Problem with Traditional Failover In a standard network setup, a service has a unique IP address. If the server hosting that IP fails, you must update DNS or a load balancer to point to a new ...
Beyond the Firewall: The Kernel Attack Surface Most security discussions revolve around firewalls and application-level vulnerabilities. However, for a highly skilled Linux administrator, the most...
The Backup Integrity Paradox In infrastructure administration, the only thing more dangerous than having no backups is having backups that you believe are valid but fail during a crisis. In a larg...
The Anatomy of a Production-Grade Dockerfile In the world of professional infrastructure administration, a Dockerfile that merely “works” is insufficient. A production-ready image must be fast to ...
The ZFS RAM Paradox in Hypervisors Proxmox administrators often encounter a confusing situation: their host server reports 95% RAM usage even when only a few small Virtual Machines are running. In...
The Evolution of the DDoS Attack Modern DDoS attacks have shifted up the OSI stack. While volumetric NTP or DNS amplification attacks still exist, they are easily mitigated by ISPs at the network ...
The Chaos of the Ungoverned Cluster In the early stages of Kubernetes adoption, the focus is often on simply getting applications to run. However, as more teams move to a shared production cluster...
The Architecture of Encapsulated Traffic WireGuard has revolutionised the VPN landscape with its simplicity and performance. However, because it operates by encapsulating IP packets within UDP, it...
The Transition from Static MPLS to Agile Fabrics For decades, the standard for enterprise WAN (Wide Area Network) architecture was the high-cost MPLS circuit. While reliable, MPLS acted as a “blac...
Intro Live migration in Proxmox VE allows you to move running virtual machines (VMs) between nodes in a cluster with minimal downtime. This feature is essential for load balancing, hardware mainte...