📅 2024-02-01
Enterprise Security Monitoring Lab
Production-grade ELK Stack deployment for NetFlow analysis with real-time threat detection dashboards, OPNsense firewall integration, and automated alerting.
ELK StackNetwork SecuritySIEMElasticsearchKibana
Overview
A comprehensive network security monitoring solution built on the ELK Stack (Elasticsearch, Logstash, Kibana) for analyzing NetFlow data from an OPNsense firewall.
Key Features
- ✓Real-time NetFlow data collection and analysis
- ✓Custom Kibana dashboards for network traffic visualization
- ✓Automated threat detection and alerting
- ✓Integration with OPNsense firewall
- ✓HTTPS-secured Elasticsearch with authentication
- ✓Persistent data storage and retention policies
Challenges & Solutions
- ⚡Configuring Logstash NetFlow codec for proper data parsing
- ⚡Optimizing Elasticsearch indexing for high-volume network data
- ⚡Setting up secure HTTPS communication with self-signed certificates
- ⚡Creating meaningful visualizations from raw NetFlow data
Outcomes & Impact
- ●Successfully monitoring 10,000+ flows per minute
- ●Reduced incident response time through real-time alerting
- ●Gained visibility into network traffic patterns and anomalies
- ●Built foundation for advanced threat hunting capabilities
Technologies Used
- →Elasticsearch 8.x - Data storage and search engine
- →Logstash - NetFlow v9 data ingestion and parsing
- →Kibana - Visualization and dashboards
- →OPNsense - Firewall and NetFlow data source
- →Ubuntu Server - Host operating system