When most people hear the word firewall, they imagine a big, concrete barrier that stops flames spreading from one building to another. And they’re not far off. In IT, a firewall does a similar job – it stops digital “fires” (think hackers, malware, and dodgy traffic) from spreading into your business network.
The difference? This wall is invisible, always awake, and working at lightning speed.
Plain English: What a Firewall Actually Does
Think of it as a bouncer for your IT systems. Every bit of data trying to get in or out of your network has to pass the firewall first. If it’s on the guest list, it gets through. If it looks shady, it’s shown the door.
There are two main types you’ll hear about:
- Software firewalls – built into devices like laptops or servers.
- Hardware firewalls – a physical box that sits between your internet connection and your network, filtering all the traffic that passes through.
Most businesses benefit from having both.
Why It Matters to Your Business
Here’s why small businesses in Devon should care about firewalls:
- First line of defence: Antivirus only kicks in if something gets onto your machine. A firewall stops a lot of threats before they even arrive.
- Protects your whole network: From the office PC to the card machine in your café, everything is covered.
- Regulatory peace of mind: Firewalls are often a baseline requirement for cyber insurance or compliance frameworks.
- Stops downtime: Less malware and intrusion = fewer business interruptions.
The Misconception Trap
We sometimes hear: “But I’ve got antivirus, isn’t that enough?”
Not quite. Antivirus is like having a security guard inside your shop. A firewall is the locked door that stops troublemakers even getting in. You wouldn’t skip the lock just because you’ve got CCTV, right?
From Exeter accountants storing sensitive client files, to Torquay hotels running guest WiFi alongside business systems, a firewall makes sure your network isn’t left wide open. It’s the kind of thing you don’t notice until it’s missing – and by then, it’s usually too late.
The Takeaway
A firewall isn’t some optional extra. It’s a fundamental part of keeping your business safe, stable, and compliant. Think of it as digital common sense: you wouldn’t run your office without locks, so why run your network without one?
