This presentation shares a real-world case study of how I transformed University of Dhaka's security posture following a cyberattack in late 2024. I demonstrate how academic institutions can build enterprise-grade resilience using open-source technologies (CrowdSec WAF, Wazuh SIEM, OPNsense, Proxmox) without massive budgets.
Key topics include: incident response and recovery, implementing behavior-based WAF with community threat intelligence, SIEM integration for unified monitoring, network segmentation strategies, and cost-effective security architecture. The session covers both technical implementation details and organizational lessons learned, making it valuable for institutions facing similar budget constraints.
Attendees will learn practical approaches to security transformation, including specific tool configurations, integration patterns, and how to leverage open-source solutions for comprehensive protection. I emphasize that effective security requires strategic thinking and community collaboration rather than expensive commercial solutions.