Marcio Cunha

Technical Articles

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

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Featured Articles
SpotlightRedesDevOps•12 min

IDS vs IPS: How to Detect and Block Suspicious Activity in Infrastructure

Understand the fundamental differences between IDS and IPS systems, essential tools for monitoring network traffic, identifying real-time threats, and protecting corporate environments against intrusions.

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Hardware•12 min

How to Calculate Storage for Security Cameras in an NVR

Learn how to size hard drives and calculate the necessary storage space for closed-circuit television systems using network video recorders.

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DevOps•12 min

How to Measure Real-Time Swap Memory Usage via Command Line

Learn efficient, headless methods to monitor swap memory on Linux servers in real-time, ensuring system stability and high performance under heavy workloads.

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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.

AutomaçãoRedes•12 min

BMS and SCADA Integration Architecture with BACnet IP in Industrial Networks

Learn how to design the integration of building management systems and SCADA using the BACnet/IP protocol over industrial Ethernet networks, ensuring efficiency, low communication latency, and reliability in large commercial buildings.

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.

RedesBackend•12 min

How Brute Force Attacks Work and Which Mechanisms Block Them Effectively

Understand the mechanics behind automated password guessing on the internet and explore the engineering defenses that protect modern systems from unauthorized access.

RedesEngenharia•12 min

MFA, 2FA and Adaptive Authentication: Differences, Architecture, and Security

Understand the real differences between 2FA, MFA, and adaptive authentication in system security. Learn how each approach balances user friction and protection.

BackendRedes•12 min

Passkeys vs Passwords: How Secretless Authentication Works

Learn how passkeys replace traditional passwords using public-key cryptography and biometrics to eliminate credential theft on servers.

BackendRedes•12 min

Symmetric vs Asymmetric Encryption: Differences, Mechanism and Use Cases

Explore the fundamental differences between symmetric and asymmetric encryption, understanding how each model secures data in transit and at rest in modern infrastructure.

RedesBackend•12 min

PKI: How Public Key Infrastructure Works

Explore the fundamentals of Public Key Infrastructure (PKI), the cryptographic framework responsible for ensuring security, authenticity, and confidentiality in modern internet communications.

RedesEngenharia•12 min

How a Digital Certificate Works on the Internet: Encryption and Trust

Learn how digital certificates ensure the security and authenticity of websites and systems on the internet using public-key cryptography and certificate authorities.

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.