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Hardening Linux Server: A Comprehensive Security Checklist for Beginners

By admin March 20, 2026

In the digital age, Linux server security is vital. This article offers a comprehensive hardening checklist covering essential steps – from system updates, SSH configuration, to firewalls and user management – helping you protect your server from all online threats.

Security

Installing and Configuring ModSecurity (WAF) on Nginx: Protecting Web Applications from A-Z

By admin March 19, 2026

ModSecurity (WAF) on Nginx is a powerful tool to protect web applications from common attacks. This article provides a detailed guide from basic installation to advanced fine-tuning, based on practical experience deploying in production environments, helping you set up a secure "shield" for your website.

Security

Installing and Configuring CrowdSec on Ubuntu: A New Generation Community Server Protection Solution

By admin March 19, 2026

Protecting servers from cyberattacks is a top priority. CrowdSec offers a novel, community-based approach to detect and prevent threats. This article guides you through installing and configuring CrowdSec on Ubuntu.

Security

Creating Strong Passwords and Checking Their Security: A Practical Guide with Free Tools

By admin March 19, 2026

Don't let weak passwords be your vulnerability! This article guides you on how to create super strong passwords, use the free ToolCraft tool to check their security, and protect your accounts.

Security

Nginx TLS 1.3 Configuration Guide and Cipher Suite Optimization: Achieve A+ on SSL Labs

By admin March 14, 2026

A comprehensive guide to configuring Nginx to enable TLS 1.3 and optimize cipher suites, helping your web server achieve an A+ rating on SSL Labs. Explore practical steps and foundational knowledge of TLS security.

Security

Optimizing Secure Management of Secrets, API Keys, and Credentials on Linux with HashiCorp Vault

By admin March 13, 2026

Managing secrets like API keys and credentials is a major challenge for many IT engineers. HashiCorp Vault offers a powerful solution to address this problem. This article guides you through installing, configuring, and using Vault on Linux, helping to maximize the protection of sensitive data.

Security

Hashing and Data Encoding: MD5, SHA-256, Base64, and Their Applications in IT Security

By admin March 11, 2026

In the IT world, data security is crucial. This article shares practical experiences with common vulnerabilities and how concepts like Hashing, MD5, SHA-256, and Base64 help protect critical information. A detailed guide from theory to practice.

Security

Linux Security Audit Logs: Experiences from an IT Engineer

By admin March 11, 2026

As an IT engineer, I know the importance of auditing Linux security logs. My server once suffered an SSH brute-force attack in the middle of the night—since then, I prioritize log auditing to detect threats early and protect the system.

Security

A Guide to Configuring AppArmor on Ubuntu: Restricting Process Permissions to Secure Your Server

By admin March 9, 2026

Many admins focus only on firewalls and SSH, forgetting the danger posed by the running applications themselves. This article shares real-world experience on how to use AppArmor on Ubuntu to 'jail' processes, limit their permissions, and prevent privilege escalation during an attack.

Security

Enhancing SSH Security: A Guide to Setting Up 2FA with Google Authenticator

By admin March 9, 2026

Don't let your server be compromised by a password alone. This guide will show you how to set up a second layer of 'armor' for SSH using your phone with Google Authenticator.