Managing a firewall appliance at every location gets complicated fast, especially once an organization has more than a handful of sites and little or no local IT staff to maintain equipment. Firewall as a service offers a different approach, moving policy enforcement into the cloud instead of a box at each site. This guide covers what FWaaS is, why it matters for multi-site security, how it compares to traditional and managed firewalls, where SD-WAN fits, buyer criteria, and how SC//Connect™ SD-WAN supports distributed organizations.
Firewall as a Service (FWaaS) Explained
Firewall as a Service delivers firewall policy and traffic inspection through cloud-based security infrastructure, rather than depending solely on a dedicated firewall appliance sitting at every location. Policies are set once, centrally, and applied consistently to traffic from every connected site or user.
Common FWaaS functions typically include firewall rules, web or DNS filtering, traffic inspection, threat protection, centralized policy management, and logging and reporting. The exact mix varies by provider and subscription tier.
FWaaS Traffic Protection in Practice
In plain terms, network traffic is directed through a cloud security service, checked against the organization's security policies, and then allowed or blocked based on the result. The exact traffic path, whether that's a direct cloud on-ramp or routing through an SD-WAN edge device, and the depth of inspection both vary by provider and deployment.
The Case for FWaaS in Distributed Organizations
Organizations running many stores, restaurants, hotels, fuel sites, franchise locations, branches, or remote workers face a recurring pattern: separate firewall appliances at each site, inconsistent configurations, slow policy updates, limited local expertise, and uneven visibility across the network. Those problems usually surface first at the firewall, since it handles outside traffic.
FWaaS is not automatically the right answer to every security challenge an organization faces. It solves a specific problem well: applying consistent policy at scale without a matching increase in on-site hardware and local administrative work. Keeping that scope in mind helps set realistic expectations during evaluation.
Less Dedicated Firewall Hardware and Maintenance
FWaaS reduces the number of dedicated firewall appliances that need patching, upgrading, replacing, and configuring individually at each site. This lowers the maintenance burden on IT teams that would otherwise manage hardware lifecycles across dozens or hundreds of locations.
Organizations moving to FWaaS may still use an SD-WAN edge device, router, modem, or other networking equipment locally. What changes is where security policy lives and gets enforced. Most sites still keep some networking gear on premises.
Centralized Security Across Multiple Locations
One central policy can support many sites and remote users at once. This brings consistent rules across every location, faster policy updates when a threat emerges, centralized visibility into what's happening across the network, simpler reporting, and less dependence on local staff to maintain security settings correctly.
For a distributed retail, restaurant, or hospitality operator, this matters more than it would at a single headquarters. With firewall policy delivered from the cloud and managed from one place, a small central IT team isn’t maintaining a separate firewall at every site.
FWaaS vs. Traditional and Managed Firewall Services
The table below compares three common models for enforcing firewalls across a distributed network.
| Model | Where Enforcement Happens | Who Manages It | On-Site Equipment | Adding New Sites | Main Trade-Off |
|---|---|---|---|---|---|
| Customer-managed firewall | On-site firewall | Internal IT team | Firewall appliance (physical or virtual) at each site | Deploy and configure a new firewall | Full control, but high maintenance overhead |
| Managed firewall service | On-site device | Third-party provider | Provider-managed device (physical or virtual), often handling more than firewall duties | Provider deploys and configures the site | Reduced admin burden, hardware still needed everywhere |
| Cloud-delivered FWaaS | Cloud security infrastructure, often alongside basic perimeter controls at the edge | Provider, with customer policy control | Typically a network edge device (such as SD-WAN) rather than a standalone firewall | Connect the site’s edge device; security policy is managed centrally rather than built site by site | Fast to scale, but depends on reliable cloud connectivity |
Managed firewall services and FWaaS overlap because both reduce internal administrative load, but they are not exact synonyms. A managed firewall service usually still centers on equipment at each site, physical or virtual, that a provider monitors and configures remotely, while FWaaS shifts enforcement itself into the cloud.
FWaaS Alongside SD-WAN and SASE
SD-WAN manages connectivity: path selection across multiple links, failover when a connection degrades, and application performance across the wide area network. FWaaS adds cloud-delivered security controls on top of that connectivity layer. SD-WAN security matters, but SD-WAN on its own isn’t a complete security solution without policy enforcement and inspection layered on top.
SASE, short for Secure Access Service Edge, is an architecture that combines networking and cloud-delivered security services, including FWaaS, into a more unified framework. A SASE platform typically brings together SD-WAN, FWaaS, secure web gateway functions, and zero trust network access under one management model, so policy and connectivity decisions can be made together rather than across separate tools. For this guide, SASE is useful context for how these pieces fit together. A full SASE comparison is a topic of its own.
Key Criteria for an FWaaS Solution at Distributed Sites
Evaluating FWaaS providers comes down to four practical areas worth checking closely before signing a contract.
Security Coverage
Coverage typically includes basic firewall policy, URL or DNS filtering, application controls, deeper content inspection, malware protection, and reporting, though the depth of inspection and what's bundled versus sold separately varies by provider and subscription.
Buyer question: Which protections are included, and which require separate add-ons?
SD-WAN Fit and Deployment Flexibility
Confirm whether the security service works with the organization's current SD-WAN setup or requires a new networking platform altogether. Migration effort, the option for a phased deployment, and the ability to add sites incrementally rather than replacing everything at once all affect how disruptive the rollout will be.
Buyer question: What must change in the existing network to use the service?
Centralized Policy and Visibility
This is about what an IT team actually needs day-to-day: policy management, visibility into traffic and applications across every site, alerts, logs, reporting, and how easy the system is to administer without a large security staff.
Buyer question: Can the team manage policy and see activity across every site from a central console?
Support and Service Model
Onboarding process, ongoing support, who owns incident resolution, service availability, reporting cadence, pricing structure, and which services are bundled versus billed as add-ons all shape the total cost and day-to-day experience of running the service.
Buyer question: What support and security services are included in the subscription?
SC//Connect SD-WAN: Cloud-Managed Networking With Optional Security
SC//Connect SD-WAN gives distributed locations a cloud-managed foundation with optional layers of SASE security. Security starts at the foundation: traffic travels through encrypted tunnels, and sites sit behind private IP addresses, with connections initiated outbound to the cloud gateways, which reduces exposure to the internet. The platform also supports centralized network management, application-aware traffic steering, resilience across multiple links, and automatic failover when a connection drops or degrades.
Two optional services layer security onto the platform. Web Protect provides the cloud-managed firewall, with policies managed centrally in the SC//Connect orchestrator by IP address, port, protocol, or named application. It adds URL filtering backed by a cloud-maintained index of more than 20 million URLs and identifies traffic without requiring certificates on endpoints. Network Protect adds real-time threat protection through deeper, cloud-delivered inspection and policy enforcement. Together with the SD-WAN foundation, they form a layered SASE architecture.
Both are add-ons, chosen to match an organization's security needs. Teams replacing a well-maintained next-generation firewall should first review specific feature requirements.
Conclusion
FWaaS can reduce the burden of managing dedicated firewall hardware at every site and help organizations apply more consistent security across many locations at once. Rather than evaluating providers on broad marketing claims, buyers can focus on the fundamentals: security coverage, SD-WAN fit, centralized management, and the support model behind the service.
To see how this could work across your locations, talk to a Scale Computing™ specialist about secure SD-WAN and optional cloud-delivered security for distributed sites.
Frequently Asked Questions
What is Firewall as a Service?
Firewall as a Service delivers firewall policy and traffic inspection through cloud infrastructure instead of relying only on a dedicated appliance at each location.
How is FWaaS different from a traditional firewall?
A traditional firewall runs as a physical or virtual appliance at each site, while FWaaS enforces policy through cloud-based infrastructure that supports many locations from one central point.
Is FWaaS the same as a managed firewall service?
Not exactly. A managed firewall service typically still relies on an appliance at each site that a provider manages remotely, while FWaaS moves enforcement into the cloud itself.
How does FWaaS work with SD-WAN?
SD-WAN handles connectivity and path selection across a network, while FWaaS adds cloud-delivered security controls on top of that connectivity layer.
Is FWaaS suitable for organizations with many locations?
Yes. FWaaS is often a strong fit for distributed organizations because it applies consistent policy across sites with less dependence on a dedicated firewall appliance at each one.
Does FWaaS completely replace on-site firewall hardware?
Not always. Organizations may still use an SD-WAN edge device or other networking equipment locally, even after moving firewall policy enforcement into the cloud.