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2025-08-15
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 more2025-08-13
Introduction: From Local Defense to Global Protection In the previous article, we explored Fail2ban — a reliable and time-tested tool for defending against brute-force attacks. However, Fail2ban only works with local …
Read more2025-08-12
Introduction: Server Security — The First Line of Defense Once you deploy any server or virtual machine, one of the first and most important tasks is ensuring its security. Even if your server doesn’t contain critical …
Read more2025-08-11
What is Hyper-V? Hyper-V is Microsoft’s native virtualization platform, an integral part of Windows Server operating systems and optionally available on Windows 10/11 Pro/Enterprise. Hyper-V functions as a Type 1 …
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 more2025-08-06
What is VMware? VMware is the undisputed leader and recognized standard in enterprise virtualization. The company that pioneered this technology continues to set the pace in cloud computing and data center management. …
Read more2025-08-05
Introduction: A Hidden Network Issue Developers and system administrators using servers on the OpenStack platform (for example, the C*-M*-D* hosting plans from reg.ru) sometimes encounter mysterious network problems. …
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