* Objective: Provide evidence of access reviews for an upcoming audit.
* Solution: Use Policy Analyzer to review and report on IAM policies.
* Steps:
* Step 1: Open the Google Cloud Console.
* Step 2: Navigate to the Policy Analyzer tool.
* Step 3: Select the project for which you need to review access policies.
* Step 4: Use the tool to generate reports on IAM roles and permissions.
* Step 5: Export the reports as evidence for the audit.
Policy Analyzer provides detailed insights into IAM policies, helping you to review access configurations and generate necessary reports for compliance and auditing purposes.
References:
* Policy Analyzer Documentation

The problem describes an application with two Cloud Run services (Service A - frontend, Service B - backend) and requires setting up IAM with the principle of least privilege. Service A calls Service B.
Principle of Least Privilege: This principle dictates that each entity (in this case, a Cloud Run service) should only have the minimum permissions necessary to perform its function.
Separate Service Accounts for Separate Services: To adhere to the principle of least privilege, it's best practice to assign a unique service account to each distinct service or component. This ensures that a compromise of one service account does not grant excessive permissions across other services. Service A needs permissions to run itself and to invoke Service B. Service B only needs permissions to run itself.Extract Reference:
"Assign a service account to a Cloud Run service. The service account acts as the identity for your service and determines what permissions your revisions have when executing requests. It is a best practice to grant each service account only the permissions that are required to run the specific service (principle of least privilege)." (Google Cloud documentation: https://cloud.google.com/run/docs/configuring/service-accounts) Authentication for Cloud Run Services: When one Cloud Run service (caller) needs to invoke another Cloud Run service (callee), the caller must be authorized to do so. This is typically achieved by assigning the roles
/run.invoker role on the callee service to the caller's service account.Extract Reference: "To allow a service to invoke another service, grant the roles/run.invoker role on the called service to the caller's service account." (Google Cloud documentation: https://cloud.google.com/run/docs/securing/service-to-service) Let's evaluate the options:
A). Create a new service account with the permissions to run service A and service B. Require authentication for service B. Permit only the new service account to call the backend. This violates the principle of least privilege by giving a single service account permissions for both services. If that service account were compromised, both services would be affected.
B). Create two separate service accounts. Grant one service account the permissions to execute service A, and grant the other service account the permissions to execute service B. Require authentication for service B.
Permit only the service account for service A to call the back-end. This aligns perfectly with least privilege.
Service A gets its own identity, Service B gets its own identity. Service A's service account is then granted run.invoker permissions on Service B, allowing it to call the backend while Service B requires authentication.
This is the recommended approach.
C). Use the Compute Engine default service account to run service A and service B. Require authentication for service B. Permit only the default service account to call the backend. The Compute Engine default service account often has broad permissions (e.g., editor role in its project). Using it violates the principle of least privilege and is generally discouraged for production applications due to the potential for excessive permissions.
D). Create three separate service accounts. Grant one service account the permissions to execute service A.
Grant the second service account the permissions to run service B. Grant the third service account the permissions to communicate between both services A and B. Require authentication for service B. Call the back-end by authenticating with a service account key for the third service account. This introduces unnecessary complexity with a third service account just for communication. More critically, using a service account key for authentication is generally discouraged in Cloud Run environments where ADC (Application Default Credentials) can be used, as managing keys securely becomes an operational overhead and security risk. Cloud Run services automatically use their attached service accounts for authentication when making calls to other Google Cloud services, including other Cloud Run services.
Therefore, option B is the best solution, adhering to the principle of least privilege and Google Cloud best practices for Cloud Run service-to-service authentication.

The problem focuses on securing "super administrator accounts for the organization" when Cloud Identity is synced with Microsoft Entra ID and uses Entra ID for SSO. The key requirements are the principle of least privilege and strong authentication.
Principle of Least Privilege & Dedicated Accounts: Google's best practices strongly recommend creating dedicated, non-federated accounts for super administrators that are distinct from regular user accounts. These accounts should only be used for super administrator tasks and not for daily activities. This segregation ensures that the highest privilege accounts are isolated and adhere to the principle of least privilege by not having combined responsibilities.
Extract Reference: "Designate Organization Administrators... We recommend keeping your super admin account separate from your Organization Administrator group." and "Give super admins a separate account that requires a separate login. For example, user [email protected] could have a super admin account alice- [email protected]." and "Use the super admin account only when needed. Delegate administrator tasks to user accounts with limited admin roles. Use the least privilege approach..." (Google Cloud Documentation:
"Super administrator account best practices | Resource Manager Documentation" - https://cloud.google.com
/resource-manager/docs/super-admin-best-practices)
Strong Authentication (Google 2-Step Verification): Even when using a third-party identity provider like Microsoft Entra ID for most users, Google recommends enforcing Google's own 2-Step Verification for the critical super administrator accounts. This provides a "break-glass" mechanism that is independent of the external IdP. If the Entra ID integration were to fail or become compromised, the Google-managed super administrator accounts, protected by Google's own 2SV, would still be accessible for emergency recovery.
Extract Reference: "Even when using the legacy SSO profile, super admins can't sign in with SSO in these cases: Admin console. When super administrators try to sign in to an SSO-enabled domain via admin.google.
com, they must enter their full Google administrator account email address and associated Google password (not their SSO username and password), and click Sign in to directly access the Admin console. Google doesn't redirect them to the SSO sign-in page." (Google Cloud Identity Help: "Super administrator SSO" -
https://support.google.com/cloudidentity/answer/6341409) - This highlights that super admin accounts can bypass SSO for direct Admin console access, making Google's 2SV crucial.
Extract Reference: "It's especially important for super admins to use 2SV because their accounts control access to all business and employee data in the organization. Protect your business with 2-Step Verification.
Use security keys for 2-Step Verification." (Cloud Identity Help: "Security best practices for administrator accounts" - https://support.google.com/cloudidentity/answer/9011373) Options C and D are incorrect because combining "organization administrator" (IAM role for GCP resources) and "super administrator" (Google Workspace/Cloud Identity domain-level control) privileges violates the principle of least privilege. Option A is less secure than B because relying solely on Entra ID's 2SV for super administrators means a compromise of Entra ID or an outage would leave the Google Cloud organization vulnerable without an independent break-glass mechanism.

Security Command Center (SCC) in Google Cloud provides several features to help organizations detect and respond to security threats and misconfigurations.
* Event Threat Detection: This feature continuously monitors and analyzes system logs to detect potential threats such as crypto mining. It uses machine learning and threat intelligence to identify suspicious activities and generate alerts.
* Security Health Analytics: This feature helps identify common misconfigurations and compliance violations that could impact security. It provides visibility into security posture and helps remediate issues related to misconfigurations in your Google Cloud environment.
By using both Event Threat Detection and Security Health Analytics, you can effectively monitor for crypto mining activities and detect common misconfigurations that could compromise security.
References
* Security Command Center Documentation
* Event Threat Detection
* Security Health Analytics

* Use the TCP/UDP Network Load Balancer:
* TCP/UDP Network Load Balancer maintains the client IP address by default when forwarding traffic to backends.
* Configure a TCP/UDP Network Load Balancer with appropriate backend services and health checks.
* Ensure that the load balancer is using the standard network tier to comply with the requirements.
References:
* TCP/UDP Network Load Balancing
* Network Service Tiers