GCP

GCP Overview

GCP Project and GCP Folders

Multicloud Defense currently supports both GCP projects and GCP folders although these components are supported separately. Note the following limitations and exceptions for both of these options.

A GCP project has to potential to contain GCP resources like virtual machines, storage buckets, databases, and more. It can be used to create, enable, and use all Google Cloud services.

  • Projects can be onbarded with terraform, manual onboarding, and scripted onboarding.

  • Projects are ideal for environments that require orchestration, including discovery and investigation.

  • You can interact with each project indvidually through the Multicloud Defense dashboard.

As of Version 23.10 you can connect a GCP folder with terraform. A GCP folder contains projects, other folders, or a combination of both. Organization resources can use folders to group projects under the organization resource node in a hierarchy.

  • Folders that do not have the roles/compute.admin permission enabled are considered empty and are not used.

  • Projects associated with onboarded folders are used for asset and traffic discovery only.

  • Projects associated with onboarded folders do not accommodate orchestrating service VPC or gateway creation.

  • Permissions made to folders from the GCP console must be made at the folder level. As such, Multicloud Defense actions are also made at the folder level.

If you want to onboard a GCP folder, see Terraform repository.

Overview Procedure

The following is an overview of how to connect your GCP project. An shell script is provided by Multicloud Defense and facilitates an easy connective process as part of a wizard. The script automates the following steps so you don't have to:

  1. Create two service accounts.

  2. Enable the following APIs (Compute Engine, Secret Manager).

  3. Create the two following VPCs (management, datapath).

  4. Create firewall rules to allow traffic to the Multicloud Defense Gateway (app traffic) in the datapath VPC.

  5. Create firewall rules to allow management traffic from Multicloud Defense Gateway to the Multicloud Defense Controller in the management VPC.

If you find that the script does not work, or if you need to manually change your settings, these actions can be executed using the GCP cloud console web UI, or using the gcloud CLI. See the alternative method of connecting your project here.

Create a GCP Controller Service Account

The controller service account is used by the Multicloud Defense Controller to access and manage resources in your GCP project. You must create the account and generate a key. The key is added to the controller as part of Account onboarding to the controller.

Procedure

Step 1

In your GCP dashboard, open IAM in your GCP project.

Step 2

Click Service Accounts.

Step 3

Create Service Account.

Step 4

Provide a name and ID, such as multicloud-firewall, and click Create.

Step 5

Add Compute Admin and Service Account User roles.

Step 6

Click Continue.

Step 7

Click Done.

Step 8

Click on the newly created account, scroll down to Keys and in the dropdown for Add Key and select Create New Key.

Step 9

Choose JSON (default option) and click Create.

Step 10

A file is downloaded to your computer. Save this file to your local drive.

Create a GCP Firewall Service Account

The firewall service account is used by the Multicloud Defense Gateway instances running inside your GCP project. The gateways may need to access the private keys stored in the SecretManager for TLS decryption and access storage to store PCAP files etc. (if configured by the user). Also, the gateways many need log writer permissions to send logs from Multicloud Defense Gateway to the GCP logging instance (if configured by the user).

Use the following procedure to create a controller service account:

Procedure

Step 1

In your GCP dashboard, open IAM in your GCP project.

Step 2

Click Service Accounts.

Step 3

Create Service Account.

Step 4

Provide a name and ID, such as multicloud-firewall, and click Create.

Step 5

Add Secret Manager Secret Accessor and Logs Writer roles.

Step 6

Click Continue.

Step 7

Click Done.

Connect a GCP Project to the Multicloud Defense Controller from the Multicloud Defense Dashboard

Once you prepared the GCP project as described in the previous sections, you can link it to the Multicloud Defense Controller.

Before you begin

You must already have a Google Cloud Platform (GCP) project created and have permissions to create VPCs, subnets, and a service account.

Procedure

Step 1

In the left pane of Security Cloud Control, click Multicloud Defense.

Step 2

Click the Multicloud Defense Controller button.

Step 3

In the Cloud Accounts pane, click Add Account.

Step 4

On the General Information page, select GCP from the Account Type list box.

Step 5

Login to the Multicloud Defense Dashboard.

Step 6

Click Manage and then Accounts.

Step 7

Click Add Account.

Step 8

In step 1, click the link to open an Google Cloud Platform Cloud Shell.

Step 9

In step 2, click the Copy button.

Step 10

Run the bash script in the Google Cloud Platform Cloud Shell.

Step 11

Type a name for this GCP account. You can choose to name this the same as your GCP project name. This name is visible on the Multicloud Defense Controller only.

Step 12

(Optional) Enter a description.

Step 13

Enter the Project ID for the GCP project.

Step 14

Enter the Client Email for the service account created for Multicloud Defense Controller.

Step 15

Enter the Private key of the service account.

Step 16

Click Save & Continue.

What to do next

Enable traffic visibility.

Roles Created by Multicloud Defense

When you onboard a cloud service account to Multicloud Defense Controller with the provided script, user roles are created within the parameters of the cloud service provider to ensure that communication between the services are protected. Depending on the cloud service provider, different roles and permissions are created.

The following roles are created when you onboard an account.

GCP IAM Roles

This document explains the details of the service accountes created by the CloudFormation template used in the previous section.

The CloudFormation template creates the following accounts:

  • ciscomcd-controller service account - This account is used by the Multicloud Defense Controller to access your GCP project to create resources (Multicloud Defense Gateway), load balancers for gateways, and read information about the VPCs, subnets, security grroup tags, and more. See Create a GCP Controller Service Account for more information.

  • ciscomcd-firewall service account - This account is assigned to the Multicloud Defense Gateway (compute VM instances). The account provides access to the secret manager (private keys for TLS decryption) and storage. Also, the gateways many need permissions to send logs from Multicloud Defense Gatewayto the GCP logging instance (if configured by the user). See Create a GCP Firewall Service Account for more information.