# Security Best Practices

This guide outlines security best practices for deploying and using AWS Logs MCP.

## AWS Credentials

### Use the Principle of Least Privilege

Always follow the principle of least privilege when setting up AWS credentials:

1. Create dedicated IAM users or roles for the MCP server
2. Grant only the specific permissions needed:
   ```json
   {
     "Version": "2012-10-17",
     "Statement": [
       {
         "Effect": "Allow",
         "Action": [
           "logs:DescribeLogGroups",
           "logs:GetLogEvents",
           "logs:FilterLogEvents",
           "cloudtrail:LookupEvents"
         ],
         "Resource": "*"
       }
     ]
   }
   ```
3. Consider using resource-level permissions to restrict access to specific log groups

### Use IAM Roles Instead of Access Keys

Whenever possible, use IAM roles rather than access keys:

1. For EC2 deployments, use instance profiles
2. For ECS/EKS deployments, use task/pod roles
3. For Lambda deployments, use execution roles

IAM roles automatically rotate credentials and don't require storing them in configuration files.

### Secure Credential Storage

If you must use access keys:

1. Use environment variables or AWS credentials provider
2. Never hardcode credentials in source code
3. Consider using secure parameter stores like AWS Secrets Manager or SSM Parameter Store
4. Implement regular key rotation (90 days or less)

## Network Security

### Network Isolation

1. Run the MCP server in a private subnet
2. Use VPC endpoints for AWS services
3. Implement security groups to restrict inbound/outbound traffic
4. Consider using a VPN or AWS PrivateLink for secure client connections

### Transport Security

1. Always use HTTPS/TLS for all connections
2. Configure modern TLS protocol versions (TLS 1.2+)
3. Use strong cipher suites
4. Implement certificate validation

## API Security

### Authentication and Authorization

1. Implement authentication for the MCP server
2. Use API keys or OAuth/OIDC authentication
3. Apply rate limiting to prevent abuse
4. Consider implementing request signing for sensitive operations

### Input Validation

1. AWS Logs MCP already implements Zod schemas for input validation
2. All client inputs are validated before processing
3. Reject requests with invalid or suspicious input patterns

## Logging and Monitoring

### Comprehensive Logging

1. Enable detailed logging for security events
2. Log important events like authentication, tool invocations, and errors
3. Include relevant context in logs (client IDs, request IDs)
4. Exclude sensitive information from logs

### Security Monitoring

1. Monitor for unusual access patterns
2. Set up alerting for authentication failures
3. Track API usage and rate limit breaches
4. Monitor AWS CloudTrail for unexpected credential usage

## Operational Security

### Regular Updates

1. Keep the application and all dependencies updated
2. Monitor for security advisories
3. Implement a patch management process

### Dependency Security

1. Regularly run security scans on dependencies
2. Use `npm audit` or similar tools to identify vulnerable dependencies
3. Implement a process for updating dependencies with security fixes

### Configuration Security

1. Audit configuration settings for security implications
2. Avoid overly permissive CORS settings
3. Disable debug/development features in production

## AWS-Specific Best Practices

### AWS Config and CloudTrail

1. Enable AWS Config to monitor and record resource configurations
2. Ensure CloudTrail is enabled to log all API calls
3. Consider enabling CloudTrail Insights for unusual activity detection

### VPC Flow Logs and Network Monitoring

1. Enable VPC Flow Logs to monitor network traffic
2. Set up network traffic monitoring and alerting
3. Consider implementing AWS Network Firewall or Web Application Firewall

## Compliance Considerations

If your application needs to meet specific compliance requirements:

1. Ensure data handling meets applicable regulations (GDPR, HIPAA, etc.)
2. Implement appropriate data retention policies
3. Consider enabling AWS Macie for sensitive data discovery
4. Document security measures for compliance audits

## Security Response

1. Develop a security incident response plan
2. Document procedures for handling potential security incidents
3. Establish communication channels for security issues
4. Regularly review and update security measures