> ## Documentation Index > Fetch the complete documentation index at: https://cloudanix.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Vpc network route logging remediation ### Triage and Remediation ### Remediation Here’s how to enable VPC **Route Logging** for a GCP VPC network **via the GCP Console**: 1. **Go to VPC networks** * In the Google Cloud console, go to:\ `Navigation menu (☰) → VPC network → VPC networks` 2. **Select the VPC network** * Click the name of the VPC network that contains the subnet(s) you want to enable route logging for. 3. **Open the Subnets list** * In the VPC network details page, go to the **Subnets** tab. * Find the subnet where you want to enable route logging. * Click the **Subnet name** to open its details. 4. **Edit the subnet** * At the top of the subnet details page, click **Edit**. 5. **Enable Route Logging** * Scroll down to the **Logs** section. * You should see options such as: * **VPC flow logs** * **Route logs** * Set **Route logs** to **On**. * (Optional but recommended) Adjust: * **Aggregation interval** * **Sampling** (e.g., 1.0 for all) * **Metadata** level * **Filter** (All, Include, or Exclude certain traffic) 6. **Save changes** * Scroll down and click **Save**. 7. **Verify logs in Cloud Logging** * Go to `Navigation menu (☰) → Logging → Logs Explorer`. * In the query builder, choose: * **Resource type**: `gce_subnetwork` or `gce_instance` (depending how you want to filter) * **Log name** typically includes: `vpc_route` or similar, depending on UI changes. * Run the query and confirm that route logs are appearing. Repeat steps 3–6 for each subnet where you need route logging enabled. To address “VPC Network Route Logging” findings in GCP, what most tools are actually flagging is the lack of **VPC Flow Logs** on subnets. You remediate this by enabling flow logs on each subnet via `gcloud`. Below are step‑by‑step CLI instructions. *** ### 1. List all subnets and see which have Flow Logs disabled ```bash theme={null} gcloud compute networks subnets list \ --format="table(name,region,network,enableFlowLogs)" ``` Look for subnets where `enableFlowLogs` is `False` or empty. *** ### 2. Enable VPC Flow Logs on a specific subnet Basic enablement with default settings: ```bash theme={null} gcloud compute networks subnets update SUBNET_NAME \ --region=REGION \ --enable-flow-logs ``` Replace: * `SUBNET_NAME` with your subnet name. * `REGION` with the subnet’s region (e.g. `us-central1`). *** ### 3. (Optional) Configure advanced logging options If you want finer control (recommended for production), use: ```bash theme={null} gcloud compute networks subnets update SUBNET_NAME \ --region=REGION \ --enable-flow-logs \ --logging-aggregation-interval=INTERVAL \ --logging-flow-sampling=SAMPLING_RATIO \ --logging-metadata=INCLUDE_ALL_METADATA|EXCLUDE_ALL_METADATA|CUSTOM_METADATA ``` Examples: ```bash theme={null} # Example: 5-minute aggregation, 0.5% sampling, include all metadata gcloud compute networks subnets update my-subnet \ --region=us-central1 \ --enable-flow-logs \ --logging-aggregation-interval=interval-5-min \ --logging-flow-sampling=0.005 \ --logging-metadata=INCLUDE_ALL_METADATA ``` Common values: * `--logging-aggregation-interval`: * `interval-5-min`, `interval-10-min`, `interval-15-min`, `interval-30-min`, `interval-1-min` * `--logging-flow-sampling`: * `0.0`–`1.0` (e.g. `0.5` = 50%, `0.005` = 0.5%) * `--logging-metadata`: * `INCLUDE_ALL_METADATA`, `EXCLUDE_ALL_METADATA`, `CUSTOM_METADATA` *** ### 4. Verify that Flow Logs are enabled ```bash theme={null} gcloud compute networks subnets describe SUBNET_NAME \ --region=REGION \ --format="flattened(enableFlowLogs,logConfig)" ``` Confirm `enableFlowLogs: true` and that `logConfig` matches your desired settings. *** ### 5. Repeat for all required subnets You can loop through all subnets in a network: ```bash theme={null} NETWORK_NAME="YOUR_VPC_NETWORK" for REGION in $(gcloud compute networks subnets list \ --filter="network:${NETWORK_NAME}" \ --format="value(region)" | sort -u); do for SUBNET in $(gcloud compute networks subnets list \ --filter="network:${NETWORK_NAME} AND region:${REGION}" \ --format="value(name)"); do gcloud compute networks subnets update "$SUBNET" \ --region="$REGION" \ --enable-flow-logs done done ``` *** If your finding truly refers to a different, specific “route logging” feature (e.g., from a particular security tool), share the exact tool / rule ID and I can tailor the exact `gcloud` commands. To remediate “VPC Network Route Logging” findings in GCP, you typically enable **VPC Flow Logs** on all subnets of the affected VPC network. These logs provide route-level visibility (next hop, route, etc.) via Cloud Logging. Below is how to do this using Python and the Compute Engine API. *** ### 1. Prerequisites 1. Install libraries: ```bash theme={null} pip install google-api-python-client google-auth google-auth-httplib2 ``` 2. Make sure your environment is authenticated, e.g.: ```bash theme={null} gcloud auth application-default login ``` 3. Ensure the account has: * `roles/compute.networkAdmin` (or equivalent custom role) *** ### 2. Python script to enable VPC Flow Logs on all subnets in a VPC ```python theme={null} from googleapiclient import discovery from google.auth import default PROJECT_ID = "YOUR_PROJECT_ID" NETWORK_NAME = "YOUR_VPC_NETWORK_NAME" # e.g., "default" def main(): credentials, _ = default() compute = discovery.build("compute", "v1", credentials=credentials) # 1. List all subnetworks in the project request = compute.subnetworks().aggregatedList(project=PROJECT_ID) all_subnetworks = [] while request is not None: response = request.execute() for region, region_data in response.get("items", {}).items(): for subnetwork in region_data.get("subnetworks", []): all_subnetworks.append(subnetwork) request = compute.subnetworks().aggregatedList_next( previous_request=request, previous_response=response ) # 2. Filter subnetworks that belong to the specified VPC network target_subnetworks = [ s for s in all_subnetworks if s.get("network", "").endswith("/networks/" + NETWORK_NAME) ] # 3. Enable flow logs on each subnetwork (if disabled) for s in target_subnetworks: if s.get("enableFlowLogs"): print(f"Flow logs already enabled for: {s['name']} ({s['region']})") continue subnetwork_name = s["name"] subnetwork_region = s["region"].split("/")[-1] # Subnetwork patch body: keep existing fields, just set enableFlowLogs and logConfig body = { "enableFlowLogs": True, "logConfig": { "aggregationInterval": "INTERVAL_5_MIN", # e.g. 5-minute aggregation "flowSampling": 0.5, # 50% sampling "metadata": "INCLUDE_ALL_METADATA", # or "EXCLUDE_ALL_METADATA"/"CUSTOM_METADATA" } } print(f"Enabling flow logs for: {subnetwork_name} ({subnetwork_region})") request = compute.subnetworks().patch( project=PROJECT_ID, region=subnetwork_region, subnetwork=subnetwork_name, body=body, ) response = request.execute() print(f"Operation started: {response.get('name')}") if __name__ == "__main__": main() ``` *** ### 3. What this achieves * Enumerates all subnetworks in the project. * Filters those in the specified VPC network. * For each subnetwork, enables `enableFlowLogs` and configures a `logConfig`, which results in flow + route logging going to Cloud Logging. Adjust `aggregationInterval`, `flowSampling`, and `metadata` as per your org’s logging/volume requirements. ```hcl theme={null} # There is currently no Terraform argument on any google_* resource # that enables or configures GCP "VPC Network Route Logging". # # Route logging is controlled only by GCP itself (Console / gcloud), # not exposed via the google provider yet, so it cannot be remediated # directly in Terraform. # You must enable it outside Terraform, for example: # - In the Console: VPC Network → Routes → Route logging settings, # then enable route logging for the desired network(s); or # - With gcloud: use the documented `gcloud compute` commands # for route logging once they are available in your SDK. # After doing so, `terraform plan` will show no changes related to # route logging, because the provider cannot manage that setting. ```