grants/HARDENING_SUMMARY.md

Production Hardening Pack — Implementation Summary

Overview

This document summarizes all security, performance, and operational hardening measures implemented for production deployment.

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Security Hardening

1. Rate Limiting

File: server/middleware/rateLimit.ts

Implementation:

• API endpoints: 100 requests per 15 minutes per IP
• Health check: 1000 requests per minute (unrestricted for monitoring)
• Nginx layer: 10 requests/second with burst of 20

Benefits:

• Prevents DDoS attacks
• Prevents API abuse
• Protects against brute force

2. Input Validation

File: server/middleware/validate.ts

Implementation:

• Zod schema validation on all API endpoints
• Returns 400 with detailed validation errors
• Prevents injection attacks

Benefits:

• Prevents malformed requests
• Clear error messages for debugging
• Type-safe validation

3. Security Headers

Files: server/index.ts (Helmet), nginx.conf

Headers Implemented:

X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
Referrer-Policy: no-referrer-when-downgrade
Content-Security-Policy: default-src 'self' ...
Strict-Transport-Security: max-age=31536000; includeSubDomains
X-Download-Options: noopen
X-Permitted-Cross-Domain-Policies: none

Benefits:

• Prevents clickjacking
• Prevents XSS attacks
• Prevents MIME-type sniffing
• Enforces HTTPS
• Restricts cross-domain policies

4. CORS Hardening

File: server/index.ts

Implementation:

• Configured via CLIENT_ORIGIN env var
• Methods restricted to GET/POST
• Credentials disabled
• Max age 10 minutes

Benefits:

• Prevents unauthorized cross-origin requests
• Reduces attack surface

5. Request Size Limits

Files: server/index.ts, nginx.conf

Limits:

• JSON body: 1MB
• URL-encoded body: 1MB
• Client body buffer: 1MB
• Client max body: 2MB

Benefits:

• Prevents large payload attacks
• Protects against memory exhaustion

6. Sensitive Data Protection

File: server/middleware/logger.ts

Implementation:

• API keys redacted in logs
• Authorization headers redacted
• Cookies redacted

Benefits:

• Prevents credential leakage in logs
• Compliance with security best practices

7. File Access Control

File: nginx.conf

Implementation:

• Hidden files denied (/.*)
• Error pages customized
• Directory listing disabled

Benefits:

• Prevents .env exposure
• Prevents directory traversal
• Reduces information disclosure

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Performance Hardening

1. Compression

File: nginx.conf

Implementation:

• Gzip enabled for text-based assets
• Minimum length 1KB
• Vary header for proper caching

Benefits:

• 60-80% bandwidth reduction
• Faster page loads
• Better SEO

2. Caching

File: nginx.conf

Implementation:

• Static assets: 6 months cache
• Immutable flag for fingerprinted assets
• API responses not cached

Benefits:

• Reduced server load
• Faster repeat visits
• Better user experience

3. Timeouts

File: nginx.conf

Timeouts Configured:

• Client body: 12 seconds
• Client header: 12 seconds
• Keepalive: 15 seconds
• Send: 10 seconds

Benefits:

• Prevents slowloris attacks
• Frees up connections faster
• Better resource utilization

4. Buffer Limits

File: nginx.conf

Limits:

• Body buffer: 1MB
• Header buffer: 1KB
• Large headers: 2 x 1KB

Benefits:

• Prevents buffer overflow attacks
• Predictable memory usage
• Protection against malformed requests

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Operational Hardening

1. Environment Validation

File: server/lib/env.ts

Implementation:

• Zod schema validation on startup
• Fails fast if required vars missing
• Logs configuration (without secrets)

Benefits:

• Prevents misconfigured deployments
• Clear error messages
• Early detection of issues

2. Structured Logging

File: server/middleware/logger.ts

Implementation:

• Pino logger (JSON format)
• Request ID tracking
• Response time logging
• Redaction of sensitive data

Benefits:

• Easy log aggregation
• Request tracing
• Compliance with logging standards

3. Error Handling

File: server/middleware/errorHandler.ts

Implementation:

• Global error handler
• Sanitized errors in production
• Detailed errors in development
• Request ID in error responses

Benefits:

• No stack traces exposed in production
• Consistent error format
• Easier debugging with request IDs

4. Health Checks

File: server/index.ts, docker-compose.yml

Implementation:

• /api/health endpoint
• Docker health check configured
• Service dependencies wait for health

Benefits:

• Monitoring integration
• Automatic restart on failure
• Proper startup ordering

5. Resource Limits

File: docker-compose.prod.yml

Limits:

• API server: 1 CPU, 512MB RAM
• Frontend: 0.5 CPU, 256MB RAM

Benefits:

• Predictable resource usage
• Prevents resource exhaustion
• Better container scheduling

6. Log Rotation

File: docker-compose.prod.yml

Configuration:

• Max size: 10MB per log file
• Max files: 3
• JSON format for parsing

Benefits:

• Prevents disk exhaustion
• Easier log management
• Compliance with log retention

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Deployment Hardening

1. Multi-Stage Docker Build

File: Dockerfile

Stages:

1. Frontend builder (Node 20 Alpine)
2. API builder (Node 20 Alpine)
3. Frontend runtime (Nginx Alpine)
4. API runtime (Node 20 Alpine)

Benefits:

• Smaller final images
• No dev dependencies in production
• Reduced attack surface

2. Health-Based Dependencies

File: docker-compose.yml

Implementation:

depends_on:
  api-server:
    condition: service_healthy

Benefits:

• Frontend waits for API to be ready
• Prevents startup race conditions
• Better reliability

3. Restart Policies

File: docker-compose.yml

Policy: unless-stopped

Benefits:

• Automatic recovery from crashes
• Persists across reboots
• Manual stop respected

4. Production Override

File: docker-compose.prod.yml

Features:

• Resource limits
• Log rotation
• Always restart policy
• Production log level

Usage:

docker compose -f docker-compose.yml -f docker-compose.prod.yml up -d

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Monitoring & Alerting

1. Health Endpoint

URL: /api/health

Response:

{
  "status": "ok",
  "timestamp": "2026-01-15T..."
}

Usage:

• Uptime monitoring
• Load balancer health checks
• Kubernetes readiness probes

2. Request Logging

Format: JSON (production)

Fields:

• Request ID
• Method
• Path
• Status code
• Duration
• IP address
• User agent

Usage:

• Log aggregation (ELK, Grafana)
• Performance analysis
• Security auditing

3. Error Tracking

Implementation:

• Structured error logging
• Request ID correlation
• Stack traces in development

Integration:

• Sentry (recommended)
• Log-based alerting
• Custom error dashboards

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Backup & Recovery

1. Backup Script

File: backup.sh (in deployment guide)

Backs Up:

• .env file (critical)
• Docker Compose config
• Docker volumes (if any)

Retention: 7 days

2. Backup Schedule

Cron: Daily at 2 AM

Command:

0 2 * * * /opt/atlasgreen/backup.sh

3. Restore Procedure

Documented in: DEPLOYMENT_GUIDE_VPS.md

Steps:

1. Stop containers
2. Restore .env
3. Restore config
4. Rebuild containers
5. Verify health

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SSL/TLS Configuration

1. Certificate

Provider: Let's Encrypt (free)

Validity: 90 days (auto-renewal)

Command:

sudo certbot --nginx -d yourdomain.com

2. Nginx SSL Config

File: DEPLOYMENT_GUIDE_VPS.md (example config)

Features:

• TLS 1.2 and 1.3 only
• Strong cipher suites
• Session caching
• HTTP/2 support

3. Auto-Renewal

Test Command:

sudo certbot renew --dry-run

Cron: Twice daily (default)

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Access Control

1. SSH Hardening

File: /etc/ssh/sshd_config

Settings:

• Root login: disabled
• Password auth: disabled
• Key-based auth: enabled
• AllowUsers: restricted

2. Firewall

Tool: UFW

Rules:

• SSH (22): allowed
• HTTP (80): allowed
• HTTPS (443): allowed
• All others: denied

3. Fail2Ban

Service: SSH protection

Configuration:

• Max retries: 5
• Ban time: 1 hour
• Find time: 10 minutes

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Compliance

GDPR

• Minimal data collection
• No personal data stored by default
• IP addresses in logs (consider retention policy)
• Privacy policy recommended

SOC2 (if applicable)

• Access control via SSH keys
• Change management via Git
• Logging enabled
• Consider adding audit logging

Security Best Practices

• OWASP Top 10 addressed
• CIS Docker Benchmark aligned
• Nginx hardening applied
• Regular updates scheduled

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Testing

Security Tests

• SSL Labs test (target: A+)
• OWASP ZAP scan
• Dependency vulnerability scan (Trivy)
• Rate limiting test
• Input validation test

Performance Tests

• Load test (100 concurrent users)
• Response time < 500ms
• Page load < 3 seconds
• Gzip compression verified

Operational Tests

• Health check accessible
• Log rotation working
• Backup script tested
• Restore procedure tested
• Rollback procedure tested

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Maintenance

Weekly

• Review error logs
• Check disk space
• Review access logs

Monthly

• Update system packages
• Update Docker images
• Review API keys
• Test backup restoration

Quarterly

• Security audit
• Performance review
• Documentation update
• Firewall rule review

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Incident Response

Severity Levels

• P1: Site down, data breach (< 15 min response)
• P2: Major functionality broken (< 2 hours)
• P3: Minor issues (< 24 hours)
• P4: Cosmetic/low priority (< 1 week)

Escalation

1. Primary Admin
2. Secondary Admin
3. External consultant

Communication

• Status page (if applicable)
• Email notifications
• Slack/Teams alerts

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Documentation

Created Documents

1. SECURITY_CHECKLIST.md — Security hardening checklist
2. DEPLOYMENT_GUIDE_VPS.md — Step-by-step deployment
3. PRODUCTION_READINESS.md — Pre-deployment verification
4. HARDENING_SUMMARY.md — This document
5. BACKUP_PROCEDURE.md — Backup and restore procedures

Required Actions

• Fill in emergency contacts
• Configure monitoring alerts
• Test backup restoration
• Document custom configurations
• Train team on procedures

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Next Steps

1. Immediate:

   • Review all checklists
   • Configure monitoring
   • Test backup/restore

2. Before Go-Live:

   • Complete security tests
   • Complete performance tests
   • Train support team

3. Post Go-Live:

   • Monitor closely for 1 week
   • Review logs daily
   • Address any issues promptly

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Version: 1.0
Date: January 2026
Status: Ready for Production Deployment