Landing Zones with AWS Control Tower

Spinning up dozens of accounts by hand leads to inconsistent, insecure setups. A landing zone is a well-architected, multi-account environment with security and governance built in from day one.

AWS Control Tower automates creating and governing a landing zone, so every account starts from the same secure baseline.

Control Tower orchestrates several services into one governed environment:

• AWS Organizations for the account structure.
• IAM Identity Center for sign-in.
• CloudTrail and Config for logging and compliance.

It wires these together with sensible defaults automatically.

Control Tower sets up a baseline structure:

• A management account at the top.
• A Log Archive account that centralizes CloudTrail and Config logs.
• An Audit (Security) account for cross-account security access.

This separation keeps logs and security tooling away from workloads.

Control Tower enforces governance through guardrails (also called controls).

• Preventive guardrails use SCPs to block disallowed actions.
• Detective guardrails use Config rules to flag non-compliant resources.
• Proactive guardrails check resources before deployment.

Guardrails are labeled mandatory, strongly recommended, or elective.

Account Factory is Control Tower's templated way to provision new accounts.

Each new account automatically lands in the right organizational unit, inherits guardrails, and is enrolled in centralized logging. Teams get compliant accounts without manual security setup, often via a self-service catalog.

Control Tower organizes accounts into OUs (organizational units) that group accounts by purpose, such as Production or Sandbox.

Guardrails apply at the OU level, so every account in an OU inherits the same controls. This makes policy consistent and easy to reason about.

The Control Tower dashboard shows compliance status across the landing zone and detects drift: when someone changes a managed setting outside Control Tower.

For example, if an SCP is edited directly, Control Tower reports drift so you can re-apply the intended baseline.

You can build a multi-account setup with raw Organizations and SCPs, but Control Tower does the wiring for you and keeps it consistent.

• Manual gives full control but more effort and risk of gaps.
• Control Tower gives a fast, opinionated, well-architected baseline.

Customizations for Control Tower (CfCT) and Account Factory for Terraform let you extend the baseline with your own resources and configurations applied to every new account.

This blends Control Tower's guardrails with organization-specific requirements like baseline IAM roles or network setups.

Control Tower's Audit account is preconfigured for cross-account security access, making it the natural home for delegated administrators of GuardDuty, Security Hub, and Config.

Because logging and audit are centralized from day one, plugging in organization-wide threat detection and compliance is straightforward rather than retrofitted.

Choose Control Tower when you need to stand up and govern many accounts quickly with security best practices baked in.

On the exam, "establish a secure multi-account baseline with guardrails and centralized logging" is a strong signal for AWS Control Tower.

Identify the right service.

You learned how AWS Control Tower builds a governed landing zone.

• It orchestrates Organizations, Identity Center, CloudTrail, and Config.
• Guardrails (preventive, detective, proactive) enforce policy by OU.
• Account Factory provisions compliant accounts and detects drift.