# Security Configuration Guide

## Overview

This guide documents the security configuration options available in the MCP Standards Server and provides best practices for secure deployment.

## Network Security

### Bind Address Configuration

By default, all services bind to `127.0.0.1` (localhost) for security. This prevents unauthorized network access.

#### MCP Server
```bash
# Default (secure - localhost only)
python -m src.server

# Custom bind address (use with caution)
export MCP_HOST=192.168.1.100
python -m src.server
```

#### HTTP Server
```bash
# Default (secure - localhost only)
python -m src.http_server

# Custom bind address (use with caution)
export HTTP_HOST=192.168.1.100
python -m src.http_server
```

#### Web Backend
```bash
# Default (secure - localhost only)
python web/backend/main.py

# Custom bind address (use with caution)
export WEB_HOST=192.168.1.100
python web/backend/main.py
```

### Security Best Practices

1. **Production Deployment**
   - Always use a reverse proxy (nginx, Apache) for external access
   - Never expose services directly on `0.0.0.0`
   - Use TLS/SSL for all external connections

2. **Environment Variables**
   ```bash
   # Secure configuration example
   export MCP_HOST=127.0.0.1
   export MCP_PORT=50051
   export HTTP_HOST=127.0.0.1
   export HTTP_PORT=8080
   export WEB_HOST=127.0.0.1
   export WEB_PORT=8000
   ```

3. **Firewall Rules**
   ```bash
   # Allow only localhost connections
   sudo ufw deny 50051
   sudo ufw deny 8080
   sudo ufw deny 8000
   ```

## Dependency Security

### Security Scanning

The project includes security scanning tools:

```bash
# Install development dependencies including security tools
pip install -e ".[dev]"

# Run dependency security scan
pip-audit

# Alternative security scan
safety check
```

### Automated Security Checks

Add to your CI/CD pipeline:

```yaml
- name: Security Audit
  run: |
    pip install pip-audit safety
    pip-audit
    safety check
```

## Authentication & Authorization

### JWT Configuration

For API authentication:

```python
# Environment variables
JWT_SECRET_KEY=your-secret-key-here
JWT_ALGORITHM=HS256
JWT_EXPIRATION_HOURS=24
```

### API Key Management

```python
# Environment variables
API_KEY=your-api-key-here
API_KEY_HEADER=X-API-Key
```

## Data Security

### Redis Security

```python
# Environment variables
REDIS_PASSWORD=your-redis-password
REDIS_SSL=true
REDIS_SSL_CERT_REQS=required
```

### Database Security

```python
# Environment variables
DATABASE_ENCRYPTION=true
DATABASE_SSL_MODE=require
```

## Monitoring & Logging

### Security Event Logging

```python
# Environment variables
SECURITY_LOG_LEVEL=INFO
SECURITY_LOG_FILE=/var/log/mcp-standards/security.log
ENABLE_AUDIT_LOGGING=true
```

### Metrics Security

```python
# Prometheus metrics endpoint security
METRICS_AUTH_REQUIRED=true
METRICS_USERNAME=metrics_user
METRICS_PASSWORD=secure_password
```

## Vulnerability Management

### Regular Updates

```bash
# Check for outdated packages
pip list --outdated

# Update all dependencies
pip install --upgrade -r requirements.txt
```

### Security Patches

Monitor security advisories:
- GitHub Security Advisories
- Python Security Announcements
- NIST National Vulnerability Database

## Incident Response

### Security Contacts

```
Security Team: security@your-org.com
Incident Response: incident-response@your-org.com
```

### Response Procedures

1. **Detection**: Monitor logs and alerts
2. **Containment**: Isolate affected systems
3. **Eradication**: Remove security threats
4. **Recovery**: Restore normal operations
5. **Lessons Learned**: Update security measures

## Compliance

### NIST Controls Implemented

- **AC-3**: Access Enforcement
- **AC-4**: Information Flow Enforcement
- **AU-2**: Audit Events
- **IA-2**: Authentication
- **SC-8**: Transmission Confidentiality
- **SI-2**: Flaw Remediation

### Security Standards

- OWASP Top 10 compliance
- CIS Security Controls
- ISO 27001 alignment

## Security Checklist

- [ ] All services bound to localhost by default
- [ ] Environment variables for sensitive configuration
- [ ] Security scanning tools installed
- [ ] Regular dependency updates scheduled
- [ ] Audit logging enabled
- [ ] TLS/SSL configured for production
- [ ] Firewall rules implemented
- [ ] Incident response plan documented
- [ ] Security training completed
- [ ] Compliance requirements verified