2025-10-02
Introduction
Data is the foundation of any business. Where and how you store it affects security, performance, and company growth. Today, entrepreneurs face a strategic choice: use their own equipment (local storage) or rent resources from major providers (cloud storage).
Think of it as choosing between buying a house and renting an apartment. Each option has its pros and cons. Let’s break it down.
🏠 Local Storage: Your Own Digital Home
What is it?
Physical servers in your office. You buy, configure, and maintain them yourself.
2025-09-22
Getting a new VPS is just the beginning. By default, the server is insecure and not ready for production use. This checklist will help you step by step to prepare your VPS: close security holes, enable updates, and configure the basic infrastructure.
1. First login and changing the root password
Connect to the server via SSH:
Change the temporary password to your own unique and complex one:
2. Create a new user with sudo
Working as root all the time is dangerous. Let’s create a regular user:
2025-08-19
Dynamic Routing on Keenetic: BGP and OSPF
When Static Routing Isn’t Enough
In most home networks, routing is simple: all traffic is sent through a single ISP. In such cases, static routing is sufficient. But what if you have a complex network with multiple routers, redundant connections, or you want to experiment with advanced networking? This is where dynamic routing protocols come into play.
KeeneticOS includes built-in support for these protocols, allowing it to automatically exchange routing information with other routers, adapt to network changes, and ensure failover capabilities.
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 DevSecOps approach requires proactive hardening—strengthening the system—to minimize the attack surface before public exploits appear.
Lynis remains one of the key open-source security auditing tools for Unix systems, but today it is crucial to complement it with integration into security standards frameworks (CIS, SCAP) and automation in CI/CD pipelines.
2025-08-14
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 firewall controls all network traffic entering and leaving your server and blocks unauthorized connection attempts.
Traditionally, Linux servers have used iptables to manage firewalls, but its syntax can be complicated and confusing. Fortunately, there is a simpler and more intuitive tool — UFW (Uncomplicated Firewall).
2025-08-13
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 logs and has no awareness of what’s happening on other servers. In today’s environment, where cyberattacks are increasingly distributed and sophisticated, we need a smarter and more collaborative solution.
Enter CrowdSec — a modern, open-source Intrusion Prevention System (IPS) that leverages a crowdsourced approach to build a global threat intelligence network.
2025-08-12
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 data, it can still be targeted by automated bots constantly scanning the internet for vulnerabilities. The most common type of attack against any server is brute-force password guessing, typically aimed at SSH access, FTP services, or web control panels.
2025-08-11
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 hypervisor, installing directly on bare-metal hardware and offering functionality comparable to major players like VMware. Its main advantage is deep integration with the Microsoft ecosystem, making it a natural choice for administrators and businesses running Windows-based infrastructure.
Key Features and Advantages of Hyper-V
Hyper-V provides all the essential tools for building and managing virtualized environments, with a focus on simplicity and Windows integration.
2025-08-10
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 the foundation for many major cloud platforms, including the early versions of Amazon Web Services (AWS). Xen is known for its performance, security, and ability to flexibly manage resources, making it a popular choice for building scalable and fault-tolerant environments.
2025-08-09
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 runs virtual machines but can also emulate a processor and other hardware components. This dual nature allows it to run operating systems and applications designed for one architecture on a machine with another (for example, running an ARM system on an x86 server).