# Security Guide

This document outlines security best practices and configurations for the Home Assistant MCP Server.

## Authentication

### JWT Authentication
The server uses JWT (JSON Web Tokens) for API authentication:

```http
Authorization: Bearer YOUR_JWT_TOKEN
```

### Token Configuration
```yaml
security:
  jwt_secret: YOUR_SECRET_KEY
  token_expiry: 24h
  refresh_token_expiry: 7d
```

## Access Control

### CORS Configuration
Configure allowed origins to prevent unauthorized access:

```yaml
security:
  allowed_origins:
    - http://localhost:3000
    - https://your-domain.com
```

### IP Filtering
Restrict access by IP address:

```yaml
security:
  allowed_ips:
    - 192.168.1.0/24
    - 10.0.0.0/8
```

## SSL/TLS Configuration

### Enable HTTPS
```yaml
ssl:
  enabled: true
  cert_file: /path/to/cert.pem
  key_file: /path/to/key.pem
```

### Certificate Management
1. Use Let's Encrypt for free SSL certificates
2. Regularly renew certificates
3. Monitor certificate expiration

## Rate Limiting

### Basic Rate Limiting
```yaml
rate_limit:
  enabled: true
  requests_per_minute: 100
  burst: 20
```

### Advanced Rate Limiting
```yaml
rate_limit:
  rules:
    - endpoint: /api/control
      requests_per_minute: 50
    - endpoint: /api/state
      requests_per_minute: 200
```

## Data Protection

### Sensitive Data
- Use environment variables for secrets
- Encrypt sensitive data at rest
- Implement secure backup procedures

### Logging Security
- Avoid logging sensitive information
- Rotate logs regularly
- Protect log file access

## Best Practices

1. Regular Security Updates
   - Keep dependencies updated
   - Monitor security advisories
   - Apply patches promptly

2. Password Policies
   - Enforce strong passwords
   - Implement password expiration
   - Use secure password storage

3. Monitoring
   - Log security events
   - Monitor access patterns
   - Set up alerts for suspicious activity

4. Network Security
   - Use VPN for remote access
   - Implement network segmentation
   - Configure firewalls properly

## Security Checklist

- [ ] Configure SSL/TLS
- [ ] Set up JWT authentication
- [ ] Configure CORS properly
- [ ] Enable rate limiting
- [ ] Implement IP filtering
- [ ] Secure sensitive data
- [ ] Set up monitoring
- [ ] Configure backup encryption
- [ ] Update security policies

## Incident Response

1. Detection
   - Monitor security logs
   - Set up intrusion detection
   - Configure alerts

2. Response
   - Document incident details
   - Isolate affected systems
   - Investigate root cause

3. Recovery
   - Apply security fixes
   - Restore from backups
   - Update security measures

## Additional Resources

- [Security Best Practices](https://owasp.org/www-project-top-ten/)
- [JWT Security](https://jwt.io/introduction)
- [SSL Configuration](https://ssl-config.mozilla.org/)