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2025-09-03
Swap is virtual memory on disk that saves your VPS from crashing when RAM runs out. On low-cost servers, it’s an indispensable tool to avoid failures during short-term memory usage spikes. Setup is simple: create a file, …
Read more2025-08-30
FreeIPA: The Untamed Titan of Enterprise Identity Introduction While Keycloak and FusionAuth focus on the web, FreeIPA operates on a different level. It’s not just an authentication server. It’s an integrated solution …
Read more2025-08-15
Introduction: From Reactive Defense to Proactive Security In 2025, attacks on servers are becoming increasingly sophisticated, and reactive measures (firewall, Fail2Ban, CrowdSec) are no longer enough. The modern …
Read more2025-08-14
Introduction: The First Line of Defense for Your Server Before thinking about complex intrusion detection systems such as Fail2ban or CrowdSec, you need to build the first and most reliable line of defense—a firewall. A …
Read more2025-08-10
What is Xen? Xen is a powerful and flexible Type 1 open-source hypervisor that runs directly on server hardware, delivering high performance. Its unique architecture, based on the concept of paravirtualization, became …
Read more2025-08-09
What is QEMU? QEMU (Quick Emulator) is a multifunctional open-source project that acts both as an emulator and a virtualizer, making it a unique tool in the virtualization world. Unlike other hypervisors, QEMU not only …
Read more2025-08-08
What is KVM? KVM (Kernel-based Virtual Machine) is a virtualization technology built directly into the Linux kernel. KVM transforms the Linux kernel into a Type 1 hypervisor (bare-metal), allowing multiple virtual …
Read more2025-07-15
In the world of Linux and networking technologies, there are many subtle but critically important kernel settings. One such setting is rp_filter. This parameter, often overlooked, plays a key role in network security and …
Read more2025-06-16
There’s often a need to host a website, be it a personal blog, a test project, or a small service, directly on a home computer. This is convenient, economical, and provides full control. However, many face the …
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