Technical Articles

Practical articles, in-depth tutorials, and architectural insights on software engineering, AI, and systems.

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How to Use the Curl Command to Test API Routes and Responses from the Terminal

Master the curl utility to dispatch HTTP requests, inspect network headers, debug JSON payloads, and validate API routes directly from the command line.

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DevOps•12 min

Understanding Read, Write and Execute Permissions on Linux Directories

Learn how read, write, and execute permissions work on Unix and Linux directories to prevent critical security flaws and access issues.

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Backend•12 min

Graceful Shutdown in Microservices: Draining Connections and Zero Downtime

Learn how to implement graceful shutdown in microservices to drain active connections and finalize tasks without dropping requests during production deployments.

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RedesDevOps•14 min

WireGuard and Policy Based Routing for Multicloud Networks

Implement secure virtual private networks across multicloud environments using WireGuard, ChaCha20 encryption, and Linux policy-based routing for total corporate traffic control.

DevOps•12 min

Zero-Downtime Deployments with Docker, Multi-Stage Builds, and Kubernetes

Learn how to orchestrate continuous delivery without interruptions using rolling updates, optimized layered builds, and intelligent health checks in production environments.

ArquiteturaDevOps•12 min

SSRF Vulnerability Mitigation in Microservices with Reverse Proxies and Network Restriction

Learn how to protect distributed architectures against Server-Side Request Forgery attacks using smart reverse proxies, rigorous network restriction, and strict payload validation.

DevOpsRedes•14 min

Practical Guide to Linux Commands, Network Protocols, Diagnostics and System Administration

Explore essential Linux utilities, core network protocols, HTTP status codes, privilege control, and routine automation tasks with deep technical precision and practical examples.

RedesDevOps•12 min

DMARC in Practice: Reducing Fraud Using Your Domain

Learn how to configure DMARC, SPF, and DKIM to protect your corporate domain against phishing attacks, identity spoofing, and email fraud.

RedesDevOps•12 min

How SPF Works: Protecting Email Domains Against Spoofing

Learn how SPF (Sender Policy Framework) uses DNS records to authenticate sender servers, preventing fraud and identity spoofing in corporate electronic mail.

RedesDevOps•12 min

FTP, FTPS, and SFTP: Differences, Security, and Practical Use Cases

Understand the fundamental differences between FTP, FTPS, and SFTP in file transfers. Discover which protocol guarantees maximum security and performance.

RedesDevOps•11 min

How SFTP Works and Why It Is Different From FTP

Understand the fundamental differences between traditional FTP and the secure SFTP protocol, exploring encryption, network ports, and connection architecture.

RedesDevOps•11 min

Bastion Host: How to Build a Secure Server Access Point

Learn how to architect a bastion host to centralize and secure remote access to cloud servers and internal corporate networks. Explore hardening strategies, port controls, and audit trails.

RedesDevOps•12 min

SSH Keys: How Passwordless Cryptographic Authentication Works

Understand the practical mechanics of SSH keys, the mathematical principles behind public-key cryptography, and why this approach securely replaces traditional passwords for remote server access.