Category: Cybersecurity

Cloudflare outage knocks millions of websites offline

After outages in AWS and Azure last month, today a technical problem with Cloudflare, kocked out millions of websites offline, including X (Twitter), ChatGPT, Spotify, among others.

According to the company, the issue has now been resolved.

Sources:

https://www.businessinsider.com/cloudflare-outage-internet-down-x-open-ai-2025-11

https://www.bbc.com/news/articles/c629pny4gl7o

https://www.engadget.com/big-tech/cloudflare-hit-by-outage-causing-widespread-errors-124208302.html

National Cybersecurity Exercise 2025

I’m proud and honored to have participated in the National Cybersecurity Exercise 2025, organized by the Portuguese National Cybersecurity Centre, providing technical support for the team.

More information (in Portuguese):

https://www.itsecurity.pt/news/news/exercicio-nacional-de-ciberseguranca-testa-capacidade-de-resposta-no-setor-comunicacional

https://www.securitymagazine.pt/2025/11/12/na-ciberseguranca-nao-ha-concorrencia

I just completed the course: Vulnerability Auditing

I’m happy to report I just completed the Vulnerability Audit course, from University of Coimbra and the National Cybersecurity Centre of Portugal, as part of the C-Academy training.

A two-week, 70 Hours, intensive couse, focused on detecting and mitigating vulnerabilities, and also compliance and regulatory frameworks, like ISO 27001.

Certificate

Microsoft Security Summit Portugal

Just attended the Microsoft Security Summit Portugal, online.

A very interesting event, touching on a several subjects:

  • AI for Cybersecurity Defense
  • Zero-Trust
  • Regulation, compliance and sovereignty

Among the speakers, there was the Rear-Admiral António Gameiro Marques, que General-Director of the National Security Cabinet of Portugal.

If you want to watch a recording, its available here:

Microsoft Security Summit Portugal (Digital) – YouTube

I just completed the course: Introduction to Cybersecurity Awareness, from HP

I’m happy to report I just completed the course Introduction to Cybersecurity Awareness, from HP Life.

Course outline

Objective: Discover how to detect and defend against common cybersecurity threats to safeguard your digital information.

In this cybersecurity course, students will acquire the skills to:

  • Identify typical threats to online data and information
  • Implement basic measures to protect your sensitive data
  • Understand widely used cybersecurity terms

Certificate

I started working at the National Cybersecurity Centre of Portugal!

I’m happy to report I started working at the National Cybersecurity Centre of Portugal (Centro Nacional de Cibersegurança), part of the National Security Cabinet of Portugal (Gabinete Nacional de Segurança), in Lisbon, Portugal!

This has been one my my goals for several years, and it is something I finally achieved!

Official publication

“Ultimate Cybersecurity Career” Book Bundle, from Humble Bundle!

In this book bundle from Humble Bundle, you will get 21 books, published by Packt, to improve your Cybersecurity career.

Full list of books:

  • Practical Cybersecurity Architecture
  • Enhancing Your Cloud Security with a CNAPP Solution
  • Automating Security Detection Engineering
  • AWS Certified Security – Specialty (SCS-C02) Exam Guide
  • Pentesting Active Directory and Windows-based Infrastructure
  • Ghidra Software Reverse-Engineering for Beginners
  • Resilient Cybersecurity
  • Incident Response for Windows
  • Zero Trust Overview and Playbook Introduction
  • The OSINT Handbook
  • Microsoft Defender for Identity in Depth
  • PowerShell Automation and Scripting for Cybersecurity
  • Mastering Microsoft 365 Defender
  • Effective Threat Investigation for SOC Analysts
  • Python for Security and Networking
  • Security Monitoring with Wazuh
  • Cryptography Algorithms
  • Hack the Cybersecurity Interview
  • The Ultimate Kali Linux Book
  • CISA – Certified Information Systems Auditor Study Guide
  • Adversarial AI Attacks, Mitigations, and Defense Strategies

Get the bundle now! Take advantage of this deal as this offer expires in less than one week! I already bought mine!

At the same time, you are supportting the publishers that provide books in DRM-free format!