Oct 25, 2025 · 7 min read · En el mundo de la administración de sistemas Linux, la seguridad es primordial. Más allá de las herramientas de control de acceso discrecional (DAC) como los permisos de archivo tradicionales, los administradores profesionales recurren a mecanismos d...
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Sep 25, 2025 · 3 min read · Security in Linux systems is often misunderstood as just setting permissions or configuring firewalls. But when applications misbehave or attackers exploit vulnerabilities, we need something stronger. That’s where Mandatory Access Control (MAC) syste...
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Jun 24, 2025 · 14 min read · In this post, we’re finally wrapping up our story on KubeArmor — and Linux Security Modules (LSMs) more broadly. In Part 1, we slogged through the brutal process of working with raw AppArmor: manual profiles, confusing syntax, and a general sense of ...
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Jun 10, 2025 · 8 min read · In the last post, we rolled up our sleeves and built a minimal AppArmor profile from scratch — one script, one path, one rule at a time. We also applied it inside Kubernetes to block a pod from writing to /tmp. It worked well — but it’s not exactly s...
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Jun 3, 2025 · 9 min read · When I took my Linux Certified Sysadmin course in 2021, I was expecting a crash course in package managers, terminal commands, Bash scripting, storage, networking, etc. And I did get a ton of that — and more. There was one interesting part I didn’t p...
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Jan 10, 2025 · 4 min read · In an era dominated by containerization, microservices, and multi-user environments, ensuring robust security is no longer optional—it's critical. Enter AppArmor (Application Armor): a lightweight yet powerful Linux security module that delivers fine...
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Dec 8, 2024 · 5 min read · TL;DR. This post provides a comprehensive guide to securing and hardening an Ubuntu 24.04 LTS system. It covers essential steps such as updating the system, configuring unattended upgrades, setting up a firewall with UFW, installing Fail2Ban to preve...
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Oct 13, 2024 · 3 min read · Containerized environments have taken over modern infrastructure, but with great convenience comes even greater security risks. Let’s face it, securing containers isn’t optional—it’s mandatory. And if you’re still deploying containers without giving ...
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Oct 12, 2024 · 3 min read · Containers offer flexibility and efficiency, but they also need robust security. That’s where AppArmor and SELinux come in, adding essential layers of control. Let’s dive into these two security modules and see how they help protect containers. Plus,...
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