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Showing SKILL.md
Based on SOC occupation classification
| name | cis-gcp-foundations-3.1 |
| description | Ensure That the Default Network Does Not Exist in a Project |
| category | cis-gcp-foundations |
| version | 4.0.0 |
| author | cyberstrike-official |
| tags | ["cis","gcp","networking","vpc","firewall"] |
| cis_id | 3.1 |
| cis_benchmark | CIS Google Cloud Platform Foundation Benchmark v4.0.0 |
| tech_stack | ["gcp"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
To prevent use of default network, a project should not have a default network.
The default network has a preconfigured network configuration and automatically generates the following insecure firewall rules:
These automatically created firewall rules do not get audit logged by default.
Furthermore, the default network is an auto mode network, which means that its subnets use the same predefined range of IP addresses, and as a result, it's not possible to use Cloud VPN or VPC Network Peering with the default network.
Based on organization security and networking requirements, the organization should create a new network and delete the default network.
When an organization deletes the default network, it will need to remove all assets from that network and migrate them to a new network.
VPC networks page by visiting: https://console.cloud.google.com/networking/networks/listdefault is not present.gcloud config set project PROJECT_ID
gcloud compute networks list
It should not list default as one of the available networks in that project.
VPC networks page by visiting: default.EDIT.DELETE VPC NETWORK.For each Google Cloud Platform project,
gcloud compute networks delete default
gcloud compute networks create NETWORK_NAME
The user can prevent the default network and its insecure default firewall rules from being created by setting up an Organization Policy to Skip default network creation at https://console.cloud.google.com/iam-admin/orgpolicies/compute-skipDefaultNetworkCreation.
By default, for each project, a default network is created.
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 4.2 Establish and Maintain a Secure Configuration Process for Network Infrastructure | x | x | x |
| v7 | 11.1 Maintain Standard Security Configurations for Network Devices | x | x |