Layers of Security
Security isn't one thing. It's everything.
Layer 1: Network Perimeter
- Firewall rules (deny by default)
- DDoS protection
- VPN for remote access
Layer 2: Host Security
- Minimal attack surface
- Regular patching
- Host-based firewall
Layer 3: Application Security
- Input validation
- Output encoding
- Authentication & authorization
Layer 4: Data Security
- Encryption at rest
- Encryption in transit
- Key management
Layer 5: Monitoring
- SIEM for log aggregation
- IDS/IPS for intrusion detection
- Alert on anomalies
The Philosophy
Assume breach. Minimize damage. Detect fast. Respond faster.
Security isn't a feature. It's architecture.
Firewall rules incomplete. Missing egress filtering.