IT Explanations

Clear explanations of IT concepts, protocols, architecture and enterprise technologies.

Concepts, protocols and architecture
Infrastructure, cloud and security
Clear explanations and real-world context
For sysadmins, IT admins and MSPs

All Explanations

Understand the technology behind your infrastructure.

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Square tutorial infographic explaining how a Web Application Firewall inspects HTTP/HTTPS traffic to block attacks such as SQL injection and XSS, with steps for deploying a WAF using Docker, ModSecurity, and OWASP CRS.

What Is a WAF (Web Application Firewall)? A Beginner's Guide

A Web Application Firewall (WAF) inspects HTTP traffic at the application layer to block SQL injection, XSS, and other web attacks. Learn how it works and deploy one with Docker.

Aug 31, 202618 min readbeginnerEmanuel De Almeida

Docker containerizing applications, building images, running and scaling containers.

ExplanationDocker

What Is Docker? Container Platform Explained

Docker packages applications into containers that include code, runtime, and dependencies. Containers share the host OS kernel, making them lighter than VMs. This guide covers Docker architecture, images, Dockerfiles, and security considerations.

Jul 23, 20268 min readbeginnerEmanuel De Almeida