Network segmentation implementation

Network segmentation is an investment that reduces operational risk, improves business continuity, and facilitates compliance management.

Network segmentation helps mitigate the impact of incidents, streamlines access to resources, and better protects critical systems. We design and implement segmentation tailored to real-world business processes, IT architecture, and security requirements.

What is network segmentation?

Network segmentation involves dividing the infrastructure into separate zones, between which traffic flows only according to specific rules. This ensures that users, servers, devices, and applications do not operate in a single, flat network, but rather in an environment with controlled access. It is one of the foundations of modern security architecture, especially in hybrid, multi-site, and regulated environments.

What business benefits does segmentation provide?

Reduced risk of incident spreading

Reducing the attack surface helps contain an incident in one segment rather than allowing it to escalate throughout the environment.

Maintaining business continuity

A failure, error, or incident in one segment doesn't have to bring the entire organization to a halt. This is especially important in environments where every hour of downtime generates real costs.

Better control over infrastructure

Segmentation organizes communication between systems and shows which resources are truly critical.

Stronger justification for the board and CFO

Segmentation is easier to defend from a business perspective than many other security projects because it can be tied to a specific reduction in risk, downtime, and incident costs.

Wsparcie zgodności i audytów

Segmentation helps demonstrate that an organization has effective access control, environment separation, and protection of critical resources.

We implement segmentation and access control projects in environments of high operational complexity – from environments with several hundred users to complex infrastructures encompassing thousands of devices and multiple locations.

This allows us to tailor the segmentation model to the real constraints of the environment, not just to technological assumptions.

We carry out most segmentation projects and implementations in the following industries:

Production
Warehouses
Logistics
Finance
Hospitals

Book consultation

100+

segmentation projects in brownfield and greenfield environments

10-1000+

access points in our segmentation projects

60+

implementations of Network Access Control systems since 2012

100-18k.

users – the scale of segmentation implementations among Grandmetric clients

By sector:

Manufacturing companies
Logistics companies
Multi-location organizations
Hospitals and operationally sensitive environments
Financial sector
Water sector
Energy
Sectors relevant under the NIS2 Directive
Companies operating in a hybrid or multi-site model

By challenge:

Too-flat network and lack of resource separation
Critical, production, or OT systems operate in the environment
Excessive access between systems
Lack of a clear access model for users and devices
Need to increase ransomware resistance
Preparing for NIS2 and audit requirements
Chaos after years of infrastructure expansion
Need to justify cybersecurity investments

Jak się przygotować do audytu bezpieczeństwa NIS2

Preparation Phase

Analysis of the current environment. We identify resources, dependencies, critical systems, and actual network flows.
Assess business risks and needs. We determine which areas require separation and which segmentation model best meets the organization’s needs.
Design of the segmentation architecture. We create the target network partitioning, communication rules, access policies, and an implementation plan.

Implementation Phase and Support

Phased implementation. We implement the project in a controlled manner to minimize the risk of operational disruptions.
Coordination with production and business departments.
Testing and documentation. We verify policy performance, adjust exceptions, and prepare documentation to support maintenance and audits.
Post-implementation support. We provide training for technical teams and can also maintain and expand your network after the segmentation project is completed.

Does network segmentation help with NIS2 compliance?

Yes. Network segmentation supports access control, environment separation, critical resource protection, and risk management.

Can segmentation be implemented in stages?

Yes, and we recommend it wherever possible. For most organizations, a phased implementation is safer and more effective than a one-time change to the entire environment.

How long does a segmentation project take?

The time depends on the scale of the environment, the number of locations, the complexity of communication, and the scope of changes. Grandmetric’s project experience shows that implementing segmentation can take anywhere from a few weeks to several months, depending on the scale of the organization, its workflow, and the state of its infrastructure.

How is segmentation different from NAC?

Segmentation defines the rules for separation and communication within the network (who can join it and under what conditions), and NAC helps enforce them by dynamically allocating resources based on user identity.

Do you work in brownfield environments?

Yes. Approximately 80% of our segmentation projects are performed on existing networks. We can segment complex environments, as well as those that have been neglected for years. We rarely design segmentation “from scratch.”