Collect Cloud Next Generation Firewall logs

This document explains how to export and ingest Cloud NGFW logs into Google Security Operations using Google Cloud. The parser extracts fields from Google Cloud Firewall logs, transforms and maps them to the UDM. It handles various log fields, including connection details, threat information, rule details, and network information, performing data type conversions, renaming, and conditional logic based on the action and direction fields to populate the UDM model correctly.

Before you begin

Ensure that you have the following prerequisites:

• Google SecOps instance.
• Cloud NGFW is active and configured in your Google Cloud environment.
• Privileged access to Google Cloud and appropriate permissions to access Cloud NGFW logs.

Create a Cloud Storage bucket

1. Sign in to the Google Cloud console.

2. Go to the Cloud Storage Buckets page.

   Go to Buckets

3. Click Create.

4. On the Create a bucket page, enter your bucket information. After each of the following steps, click Continue to proceed to the next step:

   1. In the Get started section, do the following:

      1. Enter a unique name that meets the bucket name requirements; for example, gcp-ngfw-logs.

      2. To enable hierarchical namespace, click the expander arrow to expand the Optimize for file oriented and data-intensive workloads section, and then select Enable Hierarchical namespace on this bucket.

      3. To add a bucket label, click the expander arrow to expand the Labels section.

      4. Click Add label, and specify a key and a value for your label.

   2. In the Choose where to store your data section, do the following:

      1. Select a Location type.

      2. Use the location type menu to select a Location where object data within your bucket will be permanently stored.

      3. To set up cross-bucket replication, expand the Set up cross-bucket replication section.

   3. In the Choose a storage class for your data section, either select a default storage class for the bucket, or select Autoclass for automatic storage class management of your bucket's data.

   4. In the Choose how to control access to objects section, select not to enforce public access prevention, and select an access control model for your bucket's objects.

   5. In the Choose how to protect object data section, do the following:

      1. Select any of the options under Data protection that you want to set for your bucket.
      2. To choose how your object data will be encrypted, click the expander arrow labeled Data encryption, and select a Data encryption method.

5. Click Create.

Configure Cloud NGFW logs export

1. Sign in to the Google Cloud console.
2. Go to Logging > Log Router.
3. Click Create Sink.

4. Provide the following configuration parameters:

   • Sink Name: enter a meaningful name; for example, NGFW-Export-Sink.
   • Sink Destination: select Google Cloud Storage and enter the URI for your bucket; for example, gs://gcp-ngfw-logs.

   • Log Filter:

     logName="projects/<your-project-id>/logs/gcp-firewall"
     

5. Click Create.

Configure permissions for Cloud Storage

1. Go to IAM & Admin > IAM.
2. Locate the Cloud Logging service account.
3. Grant the roles/storage.admin on the bucket.

Set up feeds

There are two different entry points to set up feeds in the Google SecOps platform:

• SIEM Settings > Feeds > Add New
• Content Hub > Content Packs > Get Started

How to set up the Google Cloud NGFW Enterprise feed

1. Click the Google Cloud Compute platform pack.
2. Locate the GCP NGFW Enterprise log type.
3. Click Next.

4. Specify values for the following fields:

   • Source Type: Google Cloud Storage V2
   • Storage Bucket URI: Google Cloud storage bucket URL; for example, gs://gcp-ngfw-logs.

   • Source deletion options: select the deletion option according to your preference.

   • Maximum file age: Include files modified within the last number of days. Default is 180 days.

5. Click Get a Service Account next to the Chronicle Service Account field.

   Advanced options

   • Feed Name: A prepopulated value that identifies the feed.
   • Asset Namespace: Namespace associated with the feed.
   • Ingestion Labels: Labels applied to all events from this feed.

6. Click Create feed.

For more information about configuring multiple feeds for different log types within this product family, see Configure feeds by product.

UDM Mapping Table

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