Google Cloud Firewall Policies

Google Cloud Firewall Policies applies hierarchical firewall rules across an organization or selected folders. It is aimed at administrators governing Google Cloud resources centrally, with delegated evaluation and optional Layer 7 inspection. Its main trade-off is structural: policies attach to organizations or folders, while covered VMs can incur hourly charges.

Overview

These policies let organizations establish consistent firewall rules across folders and their resources. Rules can allow or deny connections, or use goto_next to pass evaluation to lower-level policies or VPC firewall rules. That gives central administrators room to set guardrails while leaving some evaluation to lower levels.

A policy does nothing until associated with an organization or folder, and it cannot be assigned directly to a project. That hierarchy suits organization-wide governance, but is a poor fit for teams that need project-level attachment. The product is cloud-deployed, with API access and change control.

Key features

Rules can target VPC networks and VM service accounts, but not instance tags. Teams that rely on tags to select instances will need a different targeting method. Individual rules can use IPv4 or IPv6 ranges, not both, and policies do not support VPC networks using an RDMA network profile.

For Layer 7 inspection, hierarchical rules can send matching traffic through a firewall endpoint. The inspection options include URL filtering and intrusion detection and prevention, making this a stronger fit when network controls must extend beyond standard attributes such as IP ranges, ports and protocols.

Administrators can manage policies through the Google Cloud console and gcloud CLI. Google documents a Terraform resource for firewall policy rules with logging enabled. IAM roles govern who can create, associate, modify, delete and view effective policies and rules. Rules are updated individually, with no batch-update mechanism, which can make large policy changes more laborious.

Firewall policy logs appear in Cloud Logging and can be exported to destinations supported by its export service. Rule logging records only TCP and UDP connections; existing connections might not generate entries until they have been idle for at least 10 minutes. Google Cloud states that its services undergo independent security, privacy and compliance verification, and its Services ISMS has ISO/IEC 27001 certification.

Pricing

The free Cloud NGFW Essentials plan costs nothing, with no charge for Essentials rules based on standard network attributes such as IP ranges, ports and protocols. It covers those basic rules, not the separate per-VM policy charges or endpoint and inspection charges associated with other offerings.

Hierarchical firewall policies cost nothing in both attribute tiers, but the billed rates are $0.001369863 / 1 hour per VM covered for 500 or fewer rule attributes and $0.002054795 / 1 hour per VM covered for 501 or more. Pricing is calculated per VM per month, and there is no charge if the policy applies to no VMs. The lower tier fits policies with up to 500 attributes; larger policies fall into the higher hourly rate.

Cloud NGFW Standard costs $0.02 a month, billed $0.0193 / 1 gibibyte evaluated for eligible internet ingress and egress traffic. It adds FQDN objects and threat intelligence. Cloud NGFW Enterprise costs $1.75 a month, billed $1.75 / 1 hour per deployed endpoint plus $0.0193 / 1 gibibyte inspected; it includes Layer 7 IDPS and URL filtering. The endpoint charge makes Enterprise most relevant when those inspection controls justify deployment, rather than for teams needing only basic rules.

Platforms

Google Cloud Firewall Policies supports API and web access. The console and gcloud CLI provide management paths, while the documented Terraform resource supports policy-rule automation.

Who it's for

This is best for organization-wide administrators who need to manage critical firewall rules centrally across folders and their resources. Its delegated evaluation can accommodate layered governance, while IAM roles provide control over policy responsibilities. It is less suitable for teams that need project attachment, instance-tag targeting, or batch rule updates.

Pros and cons

• Pros: Central rules can span an organization or folders, with goto_next allowing evaluation to continue at lower levels.
• Pros: Optional endpoint-based Layer 7 inspection adds URL filtering and intrusion detection and prevention.
• Pros: IAM controls policy actions, and logs integrate with Cloud Logging and its supported export destinations.
• Cons: Policies cannot attach directly to projects, and rules cannot target instance tags.
• Cons: Covered VMs incur hourly policy charges, and Enterprise adds endpoint and inspected-traffic charges.
• Cons: Rule updates are individual; logging covers only TCP and UDP and can be delayed for existing connections.

Alternatives

Firewall Management Software is a useful category to compare if Google Cloud's organization-and-folder attachment model does not match your needs.

• Comodo Internet Security is a Windows option with a free plan and a Premium tier covering antivirus, firewall, security features and updates.
• SonicWall Network Security Manager is worth considering for API, self-hosted or web use; centralized management and alerting is included with SonicWall firewall support.
• Check Point DDoS Protector is another paid option for Linux, self-hosted or web environments.
• WatchGuard FireCloud offers a paid, multi-platform alternative with a free trial and a one-year Internet Access plan for 1–50 licenses at $97.75 a year.
• pfSense is a freemium, Linux, self-hosted and web option with a free-download Community Edition.
• AlgoSec is a paid option for API, Linux, self-hosted and web environments.
• Forcepoint ZTNA is a paid option for macOS, self-hosted, web and Windows environments.
• FireMon is a paid option with a free trial; its Cloud Defense Pro plan costs $200 a month per cloud account.

Verdict

Choose Google Cloud Firewall Policies if you administer organization-wide Google Cloud rules and want central control with delegated evaluation and optional Layer 7 inspection. The reason to look elsewhere is just as clear: project-level attachment and instance-tag targeting are unavailable, while covered VMs and deployed inspection endpoints can add recurring charges.