# IRU Security Hardening Guide
## AAA+++ Grade Security Implementation

### Overview

This guide outlines security hardening measures for IRU infrastructure to achieve AAA+++ grade security standards.

### Security Architecture

```mermaid
flowchart TB
    subgraph External["External Access"]
        Internet[Internet]
        VPN[VPN Gateway]
    end
    
    subgraph DMZ["DMZ Layer"]
        WAF[Web Application Firewall]
        LB[Load Balancer]
        API_GW[API Gateway]
    end
    
    subgraph Internal["Internal Network"]
        Auth[Keycloak Auth]
        Services[IRU Services]
        DB[(Encrypted Database)]
        HSM[Hardware Security Module]
    end
    
    subgraph Infrastructure["Proxmox VE"]
        Containers[LXC Containers]
        Network[Isolated Network]
        Firewall[Host Firewall]
    end
    
    Internet --> VPN
    VPN --> WAF
    WAF --> LB
    LB --> API_GW
    API_GW --> Auth
    Auth --> Services
    Services --> DB
    Services --> HSM
    Services --> Containers
    Containers --> Network
    Network --> Firewall
```

### Security Controls

#### 1. Network Security

**Firewall Rules:**
- Ingress: Only allow required ports (443, 8545, 5000)
- Egress: Restrict outbound connections
- Inter-container: No lateral movement by default

**Network Segmentation:**
- Separate VLANs for each tier
- Isolated management network
- DMZ for external-facing services

#### 2. Authentication & Authorization

**Multi-Factor Authentication:**
- Required for all admin access
- TOTP or hardware tokens
- Biometric authentication (where supported)

**Role-Based Access Control:**
- Granular permissions
- Principle of least privilege
- Regular access reviews

**API Authentication:**
- mTLS for all API calls
- JWT tokens with short expiration
- API key rotation (90 days)

#### 3. Data Protection

**Encryption:**
- At rest: AES-256 encryption
- In transit: TLS 1.3
- Key management: HSM-backed

**Data Classification:**
- PII: Highest protection
- Financial data: High protection
- Operational data: Standard protection

**Data Retention:**
- Per IRU Agreement terms
- Automated deletion after retention period
- Secure deletion methods

#### 4. Container Security

**Image Security:**
- Scan all container images
- Use only signed images
- Regular updates and patches

**Runtime Security:**
- Read-only root filesystems
- Non-root user execution
- Resource limits enforced
- Security contexts applied

**Network Isolation:**
- No inter-container communication by default
- Explicit allow rules only
- Network policies enforced

#### 5. Monitoring & Logging

**Security Monitoring:**
- Real-time threat detection
- Anomaly detection
- Intrusion detection system (IDS)

**Audit Logging:**
- All API calls logged
- Authentication events logged
- Administrative actions logged
- Immutable audit trail

**Alerting:**
- Security incidents: Immediate alert
- Failed authentication: Alert after threshold
- Unusual activity: Alert with context

#### 6. Compliance

**Regulatory Compliance:**
- GDPR compliance
- PCI DSS (if applicable)
- SOC 2 Type II
- ISO 27001

**Audit Trail:**
- Complete transaction history
- Immutable logs
- Regular audit reviews

### Security Testing

#### Penetration Testing
- Annual external penetration tests
- Quarterly internal security assessments
- Continuous vulnerability scanning

#### Security Controls Testing
- Access control testing
- Encryption validation
- Network segmentation verification
- Incident response drills

### Incident Response

1. **Detection**: Automated threat detection
2. **Containment**: Isolate affected systems
3. **Investigation**: Root cause analysis
4. **Remediation**: Fix vulnerabilities
5. **Recovery**: Restore services
6. **Post-Incident**: Lessons learned

### Security Certifications

- SOC 2 Type II
- ISO 27001
- PCI DSS (if applicable)
- FedRAMP (if applicable)

### Security Contacts

- Security Team: security@dbis.org
- Incident Response: security-incident@dbis.org
- Compliance: compliance@dbis.org
