Protecting the Corporate Nervous System: How to Prioritize Network Security Assurance

Network security protects the nervous system of modern businesses. Highly connected and widely distributed throughout the corporate body, it keeps applications regulated, tools performing, and operations stable when functioning well. But like the human nervous system, it is vulnerable to drifting away from an optimal state and becoming weaker, leaving it open to attack. While the human nervous system is affected by stress, lack of sleep, and poor nutrition, digital network security is prone to accidental misconfigurations, ungoverned rule changes, and controls that drift away from their intended state. When weakness creeps into the systems designed to protect the business, attackers follow at AI-enabled speed. Nowhere is this more evident than at the firewall.

Reality Matches Perception: We have a Firewall Problem

We surveyed 250 cybersecurity professionals across the US to determine whether their organizations typically experienced configuration drift that posed cybersecurity risks. The results were eye-opening. Ninety-seven percent said they’d experienced a security breach or near miss tied to a misconfiguration in an existing security tool in the past year. Among those, 42% said they’d suffered incidents originating in the firewall, making it the most frequently cited source of configuration drift-related exposure.

This perception is reinforced by data from our own customers, gathered over the past year. On average, Reach customers generate 13 configuration drift alerts per day. Of those, 12 are tied to a real, risk-prioritized security exposure, in other words, a gap between how a control is configured and how it should be configured given the organization’s threat profile. Our data reveals that the most common source of these exposures is firewall platforms. Together, these findings indicate an urgent need for security teams to better identify, understand, and address configuration risk originating in firewalls.

Why Configuration Risk Accumulates in the Firewall: A Critical but Fragile Control Layer

Firewalls appear particularly prone to configuration risk due to their position in the network security stack. They occupy the enforcement layer and govern how traffic is allowed, blocked, and inspected. They are designed to ensure that nothing unauthorized enters the network. However, they are fundamentally rules-based, and there lies the problem. Every change on those rules, whether introduced for business enablement, troubleshooting, or exception handling, has the potential to subtly shift configuration away from its optimal state. Risk gets buried in the rulebase as stale rules remain live, shadowed rules obscure true exposure, and overly permissive any/any rules sneak in, leaving hidden exploitable attack paths.

To some extent, this has always been a challenge of firewall management, but the advent of AI has dramatically reduced the time period between configuration drifting from an optimal state to cause a weakness and that weakness being exploited. Legacy approaches to firewall maintenance are no longer enough.

Our research showed that organizations typically review the effectiveness of security controls – including those governing firewalls – 6.5 times per month and take an average of eight days to remediate any issues found. This wasn’t acceptable pre-AI, but now it creates a wide-open risk window. Adversaries can probe networks and test access paths at machine speed, launching attacks with no warning and exploiting network security gaps before defenders have any idea they exist.

Pursuing Network Security Assurance

Addressing firewall and other network security risks requires both tactical and strategic resets. Strategically, network security assurance must be viewed as a foundational pillar of operational resilience; a way of safeguarding the organization’s nervous system against stress and disruption. Tactically, organizations must quicken the pace of configuration risk detection and response, increasing visibility into security control performance to achieve a continuous view of exposure risk.

To achieve this shift organizations should:

1. Recognize Drift as Continuous, not Periodic, and Manage it Accordingly

Our research shows that configuration drift is not an occasional deviation, but an ongoing process that mirrors perpetual organizational change. This makes point-in-time reviews ineffective, giving only a snapshot of a constantly moving environment. Organizations should prioritize establishing continuous validation of how controls are configured and enforced, particularly in firewall environments where the most risk currently resides, and small changes can have unintended consequences.

2. Prioritize Remediation Based on Risk, Not Volume

Not every drift alert equals a material security exposure, and alert fatigue is a real problem. Organizations need an outcomes-focused approach that delivers genuine risk reduction, rather than burning up analyst time and energy responding to non-material issues.

A solution that maps configuration state to real threat scenarios based on the organization’s risk profile; surfaces exploitable attack paths; and prioritizes fixing high-impact exposures, allows the business to allocate resources where they are needed. Speed is critical; organizations need to be able to harden and realign controls at operational scale, faster than adversaries can probe the environment.

3. Gain Visibility into the Rulebase

Configuration drift is often a symptom of excessive complexity. Large rulebases, redundant policies, unused rules and years of accumulated exceptions create opportunities for misconfiguration and make security harder to manage. Organizations should regularly simplify and rationalize their network security controls, removing unnecessary complexity to improve visibility, reduce operational burden and lower the likelihood of drift occurring in the first place.

4. Close the Gap between Detection and Remediation

Reducing the time between drift detection and action proportionally reduces risk. This can be achieved by streamlining workflows between security and network teams, integrating findings with ticketing systems, and providing clear remediation guidance. Advanced solutions offer the option to automatically stage proposed fixes for human review and activation.

5. Establish and Maintain Security Intent

Many organizations focus on whether controls have changed, rather than whether they still align with the security outcomes the business is trying to achieve. As environments evolve, rules, policies and exceptions accumulate, making it difficult to determine whether controls continue to support segmentation, least-privilege access and risk management objectives. Organizations should define clear security intent and continuously validate that controls remain aligned with it, rather than simply comparing configurations against historical baselines.

6. Align Performance Metrics to Business Outcomes

Shifting performance metrics helps shift the mindset around configuration drift. Linking performance to outcomes – such as reduced incidents tied to misconfigurations – provide board-ready risk reporting figures that demonstrate genuine risk reduction.

As our research and customer telemetry data shows, network configuration drift – particularly in firewalls – is currently a major under-addressed source of enterprise risk. It is persistent and corrosive, eroding the effectiveness of controls that are assumed to be working. A lack of visibility into how constant changes are affecting overall posture is straining the organizational nervous system and leading to breaches. By resetting the strategic and tactical approach to network security assurance, organizations can meaningfully minimize configuration risk and remove a persistent source of security breaches to restore confidence that their network defenses are operating as intended.