Is Your Firewall Actually Protecting You? Without Active Monitoring, Probably Not

Every business with a network has a firewall. It sits at the edge, it filters traffic, and it gives everyone a quiet confidence that they are protected. The IT provider set it up, the vendor charges a subscription for threat updates, and the box has a reassuring light on the front that stays green.

But here is the question worth asking: when your firewall logs something suspicious, who looks at it? When it detects an unusual connection attempt at 2am on a Sunday, who responds? When a vulnerability is disclosed in the firmware and attackers start exploiting it within hours, who knows?

For most businesses, the honest answer is nobody, until something goes wrong. And by then, it is usually too late.

The Firewall Is Not the Problem. The Assumption Around It Is.

A firewall is a good and necessary control. It enforces rules about what traffic is permitted to enter and leave your network. It can block known malicious addresses, filter protocols, restrict access to management interfaces, and log connection attempts. Done well, it is a meaningful layer of defence and forms an important part of a wider IT security strategy.

What a firewall cannot do is think, adapt, or respond. It applies the rules it has been given. The moment an attacker finds a way around those rules, whether through a vulnerability in the firmware itself, a misconfigured rule, a compromised credential, or an encrypted connection that looks legitimate, the firewall becomes irrelevant. It waves the attacker through.

The data from 2025 and 2026 makes this painfully clear. An analysis of more than two trillion IT events by Barracuda Networks found that 90% of ransomware incidents exploited firewalls specifically, via unpatched vulnerabilities or compromised credentials. The firewall was not just bypassed. It was the attack surface.

In February 2026, a financial technology company called Marquis suffered a ransomware attack traced directly to exposed firewall configurations and legacy SonicWall systems. The root cause dated back months. The configurations had been sitting there, accessible and exploitable, while nobody was watching. The firewall was switched on. The monitoring was not.

The Gap Between a Firewall Alert and a Human Response

Modern firewalls generate logs constantly. Every blocked connection, every policy match, every authentication attempt, every protocol anomaly is recorded. That data is genuinely valuable, but only if someone is analysing it.

Research from SonicWall puts a number on the gap: 44% of security alerts go uninvestigated. That figure is not describing negligent organisations. It describes the reality of security teams and IT providers who are managing too many alerts across too many devices with too few hours in the day. The signal exists. Nobody processed it.

The consequences are measurable. The average time to detect a breach is 197 days, according to IBM’s 2025 Cost of a Data Breach Report. Add 69 days to contain it after detection and the average incident runs for 266 days. For organisations without active 24×7 monitoring, breaches taking longer than 200 days to identify cost over $1 million more than those detected quickly. The longer the dwell time, the deeper the attacker gets, the more they exfiltrate, and the harder and more expensive recovery becomes.

By contrast, organisations with a 24×7 Security Operations Centre reduce breach detection time by 70%. That single difference in monitoring posture changes the entire economics of a security incident and highlights why many organisations invest in managed cyber security services rather than relying solely on perimeter defences.

Firewalls Are Being Actively Targeted, Right Now

The threat landscape has shifted. Attackers no longer treat firewalls purely as obstacles to get through. They treat them as targets in their own right, because a compromised firewall gives privileged access to the entire network, is trusted by everything behind it, and is often the least-watched device in the environment.

The headlines from the last twelve months illustrate the scale of this shift. FortiBleed, the credential compromise campaign discovered in June 2026, exposed verified working administrator credentials for over 75,000 Fortinet FortiGate firewalls globally. The Cisco Adaptive Security Appliance vulnerabilities disclosed in September 2025 left nearly 50,000 devices exposed on the internet, with the UK ranking second in vulnerable device count globally. A Cisco Firepower campaign that began in late 2025 used malware called Firestarter to establish persistent backdoor access that survived patching, with activity still being observed as recently as March 2026. In each case, the common thread was the same: the attacker found a weakness, moved in quietly, and stayed undetected.

Automated bots now conduct more than 36,000 vulnerability scans per second across the internet. Your firewall’s management interface, if exposed, is being tested continuously. The question is not whether someone will try. It is whether you will notice when they succeed.

What Active Monitoring Actually Means

Active security monitoring is not a dashboard that updates every morning. It is continuous, real-time analysis of the events your security infrastructure generates, conducted by people who understand what they are looking at, around the clock. For many businesses, this forms a critical component of a broader managed security approach.

A 24×7 Security Operations Centre does several things that a firewall alone cannot:

• It correlates events across multiple sources. A firewall log showing a failed login attempt is noise. The same failed login attempt, followed ten minutes later by a successful authentication from an unusual location, followed by an outbound connection to an unfamiliar IP address, is an active intrusion. A SOC sees the pattern. A firewall sees three separate log entries.
• It distinguishes signal from noise at scale. A managed firewall generates thousands of events daily. The SOC’s role is to process that volume, filter out the routine, and surface the alerts that actually require investigation. The value is not just identifying the threats. It is not having your team investigate thousands of events that are not threats.
• It responds, not just detects. Detection without response is not security. When a genuine threat is identified, the SOC acts: isolating affected segments, blocking malicious addresses, revoking compromised credentials, and engaging incident response processes before damage spreads.
• It operates when your team does not. Most successful attacks happen outside business hours, because that is when monitoring is weakest. A 24×7 SOC closes that window entirely. The attacker cannot pick a quiet Sunday morning and expect nobody will notice.
• It knows what to look for on the device itself. Beyond traffic analysis, active monitoring includes reviewing firewall configuration for unexpected changes, watching for new admin accounts created without authorisation, checking for VPN sessions opened to unfamiliar destinations, and verifying that the device is running expected firmware. These are the indicators that appeared in FortiBleed and the Cisco campaigns, and they are invisible without someone actively looking.

The Managed Firewall Misconception

Many businesses believe they have this covered because their IT provider manages their firewall. This is worth examining carefully.

A managed firewall service typically means: the firewall was configured by someone who knows what they are doing, firmware updates are applied, and if something breaks, there is someone to call. That is substantially better than an unmanaged firewall. It is not the same as active security monitoring.

The distinction is whether your provider is reviewing logs continuously, correlating events across your environment, operating a detection capability outside business hours, and running a structured incident response process when something is found. If you are not certain of the answer, it is worth asking directly as part of a wider review of your IT support arrangements.

Layered Security: What It Actually Looks Like

The firewall is one layer. It is an important layer, but it functions properly only when it sits within a broader security architecture that includes active monitoring, endpoint protection, identity controls, a response capability, and proactive managed IT services.

Think of it this way. A firewall is an alarm system on your building. It detects the door opening, it logs the entry, and it might even send an alert. But if nobody receives that alert, nobody responds to it, and nobody reviews the footage the next morning, the alarm system did not protect you. It just documented what happened.

Real security requires the monitoring capability that makes the alarm meaningful. The box on the network and the eyes watching it are not separate products. They are two halves of the same control.

How System Force IT Approaches This

Our managed cyber security service includes active 24×7 SOC monitoring across the environments we manage. That means firewall logs are reviewed continuously, not queued for a morning check. Alerts are triaged in real time. Anomalous behaviour is investigated when it happens, not discovered during a routine audit weeks later.

We manage firewall infrastructure across client sites at scale, which means we also see patterns across environments that a single-site view would miss. When a new exploitation campaign targets a specific firmware version, we know which clients are exposed and we act before they become a statistic.

If you have a firewall but you are not sure who is watching it, that is the conversation worth having.

Get in touch with the System Force IT team to review your current monitoring posture and understand what active security management looks like in practice.

Statistics referenced in this article are drawn from the IBM Cost of a Data Breach Report 2025, Barracuda Networks Threat Intelligence 2026, SonicWall Cyber Threat Report 2026, and Verizon Data Breach Investigations Report 2025. This article reflects the threat landscape as of June 2026.