Tutorial
Oracle Privilege Escalation Detection with Unified Audit Trails
Learn how to use unified audit trails to detect Oracle privilege escalation events, validate the evidence you collect, and operationalize alerts for investigation.
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Tutorial
Tutorial
Windows Server 2025 Hardening: Disable Legacy Protocols and Services
Legacy protocols and unused services are common attack paths on server builds. This tutorial shows how to identify what to disable, apply changes safely, validate dependencies, and confirm …
Tutorial
How to Monitor Ubuntu Disk Usage with Command Line Tools
Learn how to monitor Ubuntu disk usage from the command line using df, du, ncdu, and scheduled checks. This tutorial shows what to measure, how to validate results, …
Tutorial
Node.js API Rate Limiting with Redis and Express Middleware
Learn how to implement Redis-backed API rate limiting in Node.js with Express middleware, verify it works under real traffic patterns, and harden it for production operations.
Tutorial
How to Set Up AWS Virtualization with Secure EC2 Networks
Set up an AWS EC2 environment with network isolation, controlled access, and verification steps that help you move from a basic instance launch to a production-ready security posture.
Tutorial
How to Configure SELinux Policies on CentOS 8
Configure SELinux policies on CentOS 8 by preparing the system, identifying denials, creating or adjusting policy rules, and validating the result before production use.
Tutorial
Build a REST API in Node.js with Express and JWT Auth
Learn how to build a practical REST API in Node.js with Express and JWT authentication, including setup, protected routes, validation, testing, and production readiness checks.
Tutorial
How to Configure FirewallD on CentOS 8 Step by Step
Learn how to configure FirewallD on CentOS 8 step by step: verify prerequisites, choose the right zone, open services or ports, validate rules, and confirm the firewall behaves …
Tutorial
DNSSEC Tutorial: Protecting DNS Records from Spoofing
DNSSEC adds cryptographic integrity to DNS so resolvers can verify that responses were not altered in transit. This tutorial shows how to plan, sign, validate, and operate DNSSEC …