SERVICES

OPERATE & IMPROVE:
REAL-TIME THREAT MONITORING &
DETECTION

HAVE A QUESTION?

Contact our industrial cybersecurity professionals for more information:

→ Get in touch
DOWNLOAD

You can download our brochure here:

→ Download PDF

Vulnerability Management via Nozomi/Guardian

OT environments change in ways that are easy to miss. Assets get added during shutdowns, temporary connections become permanent, engineering laptops move between zones, and legacy firmware stays in service because production cannot pause. In that context, a once-a-quarter vulnerability scan or a spreadsheet review will always lag behind reality.

Arista Cyber provides continuous vulnerability monitoring for OT using platforms such as Nozomi Guardian or Claroty. The objective is practical: keep an accurate view of what assets exist on the network, identify vulnerabilities associated with those assets, and help teams focus on what deserves attention first.

This is not about generating a long list of findings. OT teams need context. A vulnerability on a workstation used for reporting is not the same as one tied to a control device that supports critical operations. Continuous Visibility helps teams understand where issues live, how exposed they are, and how remediation can be planned without risking uptime or safety.

CONTINUOUS VISIBILITY, PROACTIVE MANAGEMENT, AND ACTIONABLE INSIGHTS FOR OT VULNERABILITIES DETECT, PRIORITIZE, AND REMEDIATE OT RISKS IN REAL TIME FOR RESILIENT OPERATIONS

Why Continuous Vulnerability Management Matters in OT

Traditional vulnerability management often assumes an IT model: regular patch cycles, rapid updates, and the ability to isolate systems quickly. OT does not work that way. Many systems operate for years with minimal changes. Some devices cannot be patched at all without vendor involvement. Others can be patched only during narrow maintenance windows.

That makes prioritisation more important than volume. OT teams need to know:

  • 1. What devices are present today, not six months ago
  • 2. Which vulnerabilities apply to those devices, based on actual versions and configurations
  • 3. What risks matter to operations, availability, and safety
  • 4. Which remediation steps are realistic, given operational constraints

Nozomi Guardian and Claroty provide the tooling to support that ongoing Visibility. Arista Cyber provides the engineering approach to deploy it safely, interpret it correctly, and shape it into actions that teams can execute.

Key Advantages

Vulnerability management in OT needs to be continuous and operationally practical. The goal is visibility and prioritisation that teams can act on without disrupting production.

  • 1. Real-time Visibility of vulnerabilities in OT assets:
    Continuous monitoring provides up-to-date visibility across controllers, HMIs, servers, and supporting infrastructure. As devices appear, change, or communicate differently, visibility stays current. This reduces blind spots and helps teams keep pace with real conditions on the network.
  • 2. Automated risk prioritisation and remediation guidance:
    Not every vulnerability carries the same operational risk. Automated scoring helps teams focus their effort where it matters most. Prioritisation becomes more meaningful when it is tied to real assets, observed communication patterns, and the role devices play in operations.
  • 3. Supports compliance and continuous monitoring:
    Ongoing monitoring supports audit readiness because asset records and vulnerability posture remain current. Instead of producing a one-time snapshot that becomes outdated quickly, the environment maintains a living record that can be reviewed during audits and internal checks.

Continuous visibility, proactive management, and actionable insight. Detect, prioritise, and remediate OT risks in real time to support resilient operations.

What We Deliver

The engagement produces clear outputs that support both implementation and ongoing operations.

  • 1. Nozomi/Claroty deployment and configuration:
    Deployment planning, safe sensor placement, and platform configuration aligned to your OT network structure and monitoring goals. This includes deciding where visibility is required most and how monitoring should be segmented.
  • 2. Automated asset and vulnerability discovery (active and passive):
    Continuous identification of assets and associated vulnerabilities using a mix of passive visibility and approved active techniques, based on what is safe for your environment. The objective is accurate identification without introducing instability.
  • 3. Reports and dashboards for risk prioritisation:
    Operational dashboards and reporting views that help teams understand risk levels, track changes over time, and focus remediation efforts. Reporting is structured so both technical teams and leadership can see what matters without noise.

Our Approach

  • ✔ Connect Nozomi/Claroty sensors to OT networks
    First, we work out where visibility is actually needed. That usually means choosing a few monitoring points that give coverage of critical segments without touching controllers or creating noise on sensitive networks. We plan placement with OT and network teams so the sensor sees the right traffic and operations stay stable.
  • ✔ Continuous asset discovery and vulnerability scanning
    Once the sensor is in place, the platform starts building a live picture of what's on the network and how it communicates. Asset details, protocols, and versions are captured from what's observed. Vulnerabilities are then matched against what is truly present, so you are not managing risk based on old inventories or assumptions.
  • ✔ Remediation reporting that OT teams can use
    Raw findings are not helpful if they cannot be acted on. We format outputs so teams can plan fixes around maintenance windows and vendor constraints, and so change control has what it needs. The focus is on "what to do next" rather than generating another long list.
  • ✔ Integrate with AD, MFA, and SIEM
    If your environment uses central identity or security monitoring, we connect the platform into those workflows. That means logs land where your team already reviews them, and alerts can follow your existing escalation path instead of living in a separate tool.
image

How Teams Use This in Day-to-Day Operations

Teams usually use the live view in a few simple ways:

  • 1. Before a maintenance window: pick the items worth fixing now, instead of treating every finding as urgent.
  • 2. During review meetings: cut through the long lists and focus on what actually affects OT risk and uptime.
  • 3. After changes are made: confirm what shifted on the network after an update, a configuration change, or new equipment coming online.
  • 4. When something looks wrong: identify the device involved quickly and check whether there are known weaknesses tied to it.
  • 5. For management updates: give a plain summary of what has improved, what is still open, and what is next, without turning it into a technical deep dive.

This keeps vulnerability management tied to real operational decisions, not a quarterly exercise that gets revisited only when someone asks for a report.

Highlights

  • ✔ Visibility that stays current as OT changes
  • ✔ Risk that can be tracked and revisited, not forgotten after a scan
  • ✔ Clearer priorities for remediation and planning

Ready to Improve OT Vulnerability Control?

When visibility is continuous, vulnerability management stops being a periodic catch-up. It becomes part of how risk is managed day to day in OT. Instead of periodic snapshots and long lists, teams gain a living view of what exists, what is vulnerable, and what to address first. That supports safer planning, faster response, and more confident governance.

If you want to implement ongoing OT vulnerability management using Nozomi Guardian or Claroty, Arista Cyber can help you deploy, configure, and operationalise the platform in a way that fits real industrial constraints.