Building a Secure, Scalable Cloud Infrastructure: A Complete Guide with Real-Time Project

1. AWS Services & Security

Key Services & Security Best Practices

Amazon EC2:

• Security Groups: Stateful firewalls controlling inbound/outbound traffic.
• NACLs: Stateless subnet-level filters for granular control.
• Encryption: Use AWS KMS to encrypt EBS volumes and instance storage.

Amazon S3:

• Bucket Policies: Restrict access by IP, IAM roles, or conditions.
• Block Public Access: Enable this setting to prevent accidental public exposure.

  {
    "Version": "2012-10-17",
    "Statement": [{
      "Effect": "Deny",
      "Principal": "*",
      "Action": "s3:*",
      "Resource": "arn:aws:s3:::example-bucket/*",
      "Condition": {"Bool": {"aws:SecureTransport": "false"}}
    }]
  }
  

• Server-Side Encryption (SSE): Use SSE-KMS for audit trails.

AWS IAM:

• Least Privilege: Assign roles with minimal permissions.
• MFA Enforcement: Require multi-factor authentication for sensitive operations.

AWS CloudTrail:

• Audit Logs: Track API calls for compliance and security analysis.

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