SECURITY_MONITORING.md

Security Monitoring Documentation

Overview

DLinRT.eu implements comprehensive security monitoring to protect against various threats and ensure data integrity.

Security Features

1. Rate Limiting

• Contact Form: 3 attempts per 5 minutes
• Newsletter Signup: Protected via database constraints
• Analytics: Graceful handling of duplicate visitor tracking

2. Content Security Policy (CSP)

• Strict CSP headers prevent XSS attacks
• Only allows trusted sources for scripts and styles
• Blocks inline scripts and unsafe eval

3. Security Headers

• Strict-Transport-Security: Forces HTTPS connections
• X-Content-Type-Options: Prevents MIME type sniffing
• X-Frame-Options: Prevents clickjacking
• X-XSS-Protection: Browser XSS protection
• Referrer-Policy: Controls referrer information

4. Input Validation

• All forms use Zod schema validation
• Server-side validation in edge functions
• Sanitized database queries via Supabase client

5. Database Security

• Row Level Security (RLS) enabled on all tables
• Public access policies only where necessary
• Proper unique constraints to prevent duplicates

Monitoring Procedures

Security Event Logging

The system logs the following security events:

• Failed form submissions
• Rate limit violations
• Unusual activity patterns

Response Procedures

1. Rate Limit Exceeded: Automatic temporary blocking
2. Failed Submissions: Logged with security context
3. Database Errors: Graceful degradation with logging

Security Configuration

Database Cleanup

• Automatic cleanup of analytics data older than 1 year
• Regular monitoring of constraint violations
• Proper error handling for duplicate entries

GDPR Compliance

• Cookie consent management
• User data deletion capabilities
• Transparent data collection practices

Incident Response

Detection

• Console logs for security events
• Database constraint monitoring
• Network request analysis

Response

1. Identify the security event type
2. Log relevant context and details
3. Apply appropriate countermeasures
4. Monitor for continued threats

Regular Maintenance

Weekly Tasks

• Review security logs
• Check for failed authentication attempts
• Monitor database performance

Monthly Tasks

• Review and update security policies
• Test incident response procedures
• Update security documentation

Contact Information

For security incidents or questions:

• Email: m.maspero@umcutrecht.nl
• Emergency: Use GitHub Security Advisory

Version History

• v1.0 (July 3, 2025): Initial security monitoring implementation