# Cloud Infrastructure Security: Protecting the Foundation Your Business Runs On

Your applications are only as secure as the infrastructure beneath them. An application with perfect code security running on an EC2 instance with a public security group, an overprivileged IAM role, and unencrypted EBS storage is genuinely vulnerable. Cloud infrastructure security is the practice of securing that foundation - the compute, storage, networking, and identity layers that everything else depends on.

## The Infrastructure Security Layers

### Identity and Access Management

IAM is the most important layer in AWS infrastructure security. Every action in AWS is an API call, and every API call requires authentication and authorization. Weak IAM is the most common path to serious cloud incidents.

Key IAM security practices:
- **Least privilege**: Grant only the permissions required for each role's function
- **No long-lived access keys**: Use IAM roles and temporary credentials via STS
- **MFA on all human users**: Non-negotiable for any user with console access
- **Regular access reviews**: Identify and remove unused permissions and access
- **Permission boundaries**: Limit what even privileged roles can do

### Compute Security

EC2 and container instances are the most common attack targets. Infrastructure security for compute means:

| Control | Implementation |
|---|---|
| OS patching | Automated patch management via SSM Patch Manager |
| Security groups | Minimal ingress rules, source-specific where possible |
| Instance metadata | IMDSv2 enforced to prevent SSRF attacks |
| Monitoring | CloudWatch agent + GuardDuty for host-level visibility |
| Snapshots | Encrypted, regular, retained per policy |

### Network Security

Network architecture determines what can communicate with what. Key controls:

**VPC design**: Use private subnets for workloads that don't need direct internet access. Route outbound traffic through NAT Gateways. Use VPC endpoints for AWS service communication.

**Security groups as firewalls**: Treat security groups as your primary network access control layer. Use specific source ranges rather than 0.0.0.0/0. Document why each rule exists.

**Network monitoring**: VPC Flow Logs provide visibility into all network traffic. This is essential for incident investigation and anomaly detection.

### Storage Security

Data at rest must be protected regardless of whether it's in S3, EBS, RDS, or DynamoDB.

**S3**: Enable Block Public Access at the account level. Use bucket policies to enforce HTTPS. Enable versioning and MFA Delete for critical buckets. Use S3 Object Lock for compliance-required immutable storage.

**EBS**: Encrypt all volumes - new and existing. The performance impact is negligible, and the protection is significant.

**RDS**: Enable encryption at rest. Restrict network access via security groups. Enable automated backups and test restore procedures.

## Continuous Infrastructure Security Assessment

Static configurations drift over time. An EC2 instance that was correctly configured at launch may have had its security group modified, its IAM role expanded, or its operating system left unpatched weeks later. Continuous infrastructure security assessment detects this drift before it becomes a vulnerability.

Dedups.ai continuously assesses your AWS infrastructure across all these layers - IAM, compute, network, storage - and flags deviations from your security baseline. When a security group rule changes to allow public access, you know within the hour, not the next quarter.

The platform integrates findings with your engineering workflow tools (Slack, Jira) so the team responsible for the infrastructure gets notified with context and remediation guidance - not just a finding ID in a portal nobody monitors.

## Infrastructure Security and Compliance

Most compliance frameworks include specific infrastructure security controls:

- **PCI-DSS**: Requires network segmentation, encryption, and documented access controls
- **HIPAA**: Requires access controls, audit logging, and transmission security
- **SOC 2**: Requires logical access controls and change management
- **ISO 27001**: Requires asset inventory, access management, and operational security

Dedups.ai maps infrastructure security findings to these compliance frameworks automatically, generating the evidence trail that auditors require without manual documentation effort.

## Building a Security Baseline

An infrastructure security baseline is a documented definition of what "correctly configured" looks like for your environment. It includes:

- Required security group configurations
- Mandatory encryption settings
- IAM role naming and permission conventions
- Required tags for resource attribution
- Logging and monitoring requirements

Once defined, a CSPM tool like Dedups.ai continuously validates your environment against this baseline and alerts on deviations.

## Ready to Get Started?

Cloud infrastructure security is the foundation everything else depends on. [Dedups.ai](https://dedups.ai) provides continuous infrastructure security assessment across all AWS resource types, with guided remediation and compliance evidence collection that makes your security program defensible and auditable.