Case Studies

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, enable it, and add it to autoload. But remember — it’s insurance, not a replacement for RAM.

Introduction

Modern VPSs are usually provisioned with enough RAM but often without swap (swap file or partition). This is a deliberate choice by providers who want you to quickly upgrade to a more expensive plan.

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. The internet seems to work, but when trying to transfer large amounts of data or establish connections to certain services, requests may hang or fail due to timeouts.

The provider explains this issue as a feature of their infrastructure:

Servers on the OpenStack platform use VxLAN technology, which reserves 50 bytes for service information. Because of this, the maximum transmission unit (MTU) on the server’s main network interface (ens3) is 1450 bytes.

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In the world of self-hosted solutions for application management, Dokploy is a modern and powerful platform designed to significantly simplify the deployment and management of Docker containers on your own server. Forget about the complexities of manually configuring Docker Compose, Nginx, or Traefik—Dokploy offers an intuitive web interface that makes this process accessible even to those just starting their journey into containerization. It’s the perfect solution for developers and teams seeking full control over their infrastructure without unnecessary hassle.

In the world of networking, there’s often a need to bridge two remote LANs so they behave like a single local network—even when separated by different routers. For MikroTik users, the concept of EoIP (Ethernet over IP) is familiar: it’s a proprietary tunneling protocol that allows creation of a virtual Ethernet interface (Layer 2) over an IP network.

Good news for Keenetic users: since firmware NDMS v2.10, Keenetic routers also support EoIP! This opens up exciting possibilities for advanced network designs.

In a world where cyberattacks are becoming increasingly sophisticated, protecting remote access to servers and network equipment is of paramount importance. Simply opening ports for SSH, RDP, or web interfaces makes them targets for constant scanning and brute-force attacks.

Today, we’ll explore a powerful yet lesser-known technique that significantly improves the security of your MikroTik (and not only): Port Knocking. It’s not just about “closing ports,” but a smart system that makes your services invisible to most scanners and bots.

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 correct packet routing. Let’s explore what it is, how it works, and why understanding it is essential for every system administrator.

What is rp_filter?

rp_filter stands for Reverse Path Filtering. It’s a Linux kernel mechanism that checks incoming network packets to verify whether they arrived on the interface through which a reply to the sender’s IP address would be routed.

Losing access to the WordPress administrator account can be a real headache. Sometimes, standard password recovery methods (via email) don’t work, especially if:

• You forgot both your login and password.
• The site’s mail sending function (wp_mail) is broken.
• The WordPress admin panel is broken or unavailable.
• The only access left is to the database (via MySQL client, phpMyAdmin, WP-CLI, etc.).

In this article, we’ll walk through a reliable and secure way to find the WordPress administrator directly in the database and reset their password using SQL. We’ll follow DevSecOps best practices to avoid breaking serialized data and minimize risks.

In this guide, I’ll show you how to easily install n8n, a powerful workflow automation tool, on your server with FastPanel using Docker Compose. FastPanel is great for managing web servers, and Docker Compose simplifies the deployment of complex applications like n8n with its dependencies (PostgreSQL and Redis).

What You’ll Need

• Your server with FastPanel installed.
• A domain or subdomain you’ll use to access n8n (e.g., n8n.yourdomain.com).
• Basic knowledge of SSH and command line.

Step 1: Prepare the Server

Connect to your server via SSH and create a directory:

Hi friends! Today, we’re diving into the world of automation and deploying n8n — a powerful workflow automation tool. We’ll install it in Docker, and use HAProxy as a reliable reverse proxy to expose it to the internet.

This guide is created especially for beginners. We’ll go step by step, explaining every command so you not only do it, but also understand how everything works.

Why do we even need HAProxy?

You could just expose n8n’s ports to the internet, right? Yes, but that’s unsafe and inconvenient. HAProxy acts as both a guard and a dispatcher:

VPNCloud: Building Your Private Network in the Cloud

In a world where more and more services are moving to the cloud and remote work has become the norm, secure and private access to your resources is more important than ever. Traditional VPN services, while solving some problems, are often centralized and may not be the most flexible solution for creating your own secure network between multiple servers, devices, or even offices.