What Is Firewall as a Service (FWaaS)?

Firewall as a Service (FWaaS) is a subscription model where you get a fully managed business firewall for a monthly fee instead of buying the hardware and licences upfront. The provider supplies the appliance, includes the security subscription, and manages it for you, all rolled into one recurring cost. It is the same firewall doing the same job at your network edge. What changes is that you rent and outsource it rather than buy and run it yourself.

Key facts

• Firewall as a Service replaces the upfront purchase of a firewall with a monthly subscription that bundles hardware, security licensing, and management.
• There are two models: cloud-delivered FWaaS, where firewall functions run in the cloud, and managed-appliance FWaaS, where a physical firewall on site is delivered as a service.
• Sophos launched Sophos Firewall Hardware as a Service for partners on 1 July 2026, delivering XGS Series appliances on monthly billing.
• A managed-appliance FWaaS fee typically covers the appliance, shipping, the security subscription, and ongoing management by the provider.
• FWaaS is charged as an operating expense, which most Australian SMEs find easier to approve than a capital hardware purchase.

What does Firewall as a Service actually mean?

Firewall as a Service means paying for firewall protection as an ongoing service rather than as a product you buy once. In the traditional model you purchase an appliance, buy a multi-year security licence to go with it, and either manage it in-house or pay someone to. FWaaS collapses those three separate things into a single monthly fee. You still have a firewall protecting your network. You just stop owning the box and stop managing it yourself.

Think of it the same way you already think about most of your software. You do not buy a perpetual licence for your email platform and run the servers yourself anymore. You pay monthly and someone else keeps it running. FWaaS applies that logic to the one piece of network hardware most SMEs still buy the old way.

What are the two types of FWaaS?

Firewall as a Service comes in two forms, and the difference matters when you are choosing. Cloud-delivered FWaaS runs the firewall function in the provider's cloud, and your traffic is routed through it before reaching the internet. It suits businesses that are fully cloud-native, have no real office network to protect, and want security applied to users wherever they are.

Managed-appliance FWaaS keeps a real firewall on your premises, handling your internet connections and local network, but you get it on a subscription instead of buying it. This is the model most Australian SMEs actually need, because they still have an office, still have on-site systems, and still need SD-WAN and local traffic inspection. It is the model 4iT delivers, using the Sophos Firewall platform.

How is FWaaS different from a managed firewall?

A managed firewall means someone else looks after a firewall you own; FWaaS means you do not own it at all. The distinction sounds small but it changes the money. With a traditional managed firewall you still paid the upfront capital cost for the appliance, and the management was an added service on top. With FWaaS the hardware cost is folded into the monthly fee, so there is no capital purchase, and the appliance refresh at end of life is part of the deal rather than a fresh quote in three to five years.

In our experience supporting Sydney SMEs, that upfront capital number is the thing that stalls firewall projects. The business agrees the ageing appliance needs replacing, then the quote for the new hardware lands and the decision goes into the too-hard basket. Removing the upfront cost removes the stall.

Who is Firewall as a Service for?

FWaaS suits SMEs that want current firewall protection without tying up capital, and it is a particularly clean fit when an existing appliance is ageing or out of support. If your firewall is three or more years old, no longer getting firmware updates, or struggling under the load of encrypted traffic inspection, a service model lets you refresh it without a capital project. It also suits businesses that prefer predictable monthly IT costs over lumpy one-off purchases.

It is not for everyone. If you have the capital, intend to keep the same appliance for its full life, and already manage it well, buying outright can be cheaper over five years. FWaaS trades a little long-run cost for no upfront outlay, guaranteed management, and a refresh you never budget for separately. For most of the SMEs we talk to, that is a trade worth making.

Frequently asked questions

What is Firewall as a Service in simple terms?

It is renting a fully managed business firewall for a monthly fee instead of buying one. The fee covers the appliance, the security subscription, and the provider managing it, so there is no upfront hardware cost and nothing for you to run yourself.

Is FWaaS the same as a cloud firewall?

Not always. Cloud-delivered FWaaS runs the firewall in the provider's cloud, while managed-appliance FWaaS keeps a physical firewall on your site delivered on a subscription. Most SMEs with an office network want the managed-appliance model, which is what 4iT provides.

Does FWaaS include the security subscription?

Yes. On the Sophos platform we use, the monthly fee includes the Xstream Protection subscription, which covers intrusion prevention, web and application filtering, encrypted traffic inspection, SD-WAN, and a zero trust access gateway. The licence does not have to be bought or renewed separately.

Can I move my current firewall to a service model?

Usually yes. If your appliance is ageing or out of support, moving to FWaaS is a clean way to refresh it without a capital outlay. The provider sizes the replacement to your actual traffic and phases the changeover so there is no gap in protection.

If you are weighing up whether a service model makes sense for your firewall, we are happy to talk it through and size the right appliance for your network. Call 4iT on 1800 367 448 or take a look at how we deliver Firewall as a Service.