Security & network access / Network segmentation
Network segmentation.Boundaries that account for applications.
Segmentation should limit risk, not guess how the business works. We connect applications, identities, traffic and technical control points in a zone model that can be introduced in phases and operated for the long term.
Scope of service
What you receive.
This service fits flat networks, data-centre or cloud migrations, audit findings, new security zones and firewall policy whose purpose is no longer apparent. We begin with business and application paths. Subnets, VRFs, firewalls, SGTs and cloud controls are possible implementations rather than the business objective itself.
A zone model people can understand
Users, servers, management, guests, IoT, infrastructure and sensitive applications are grouped by function and risk. Zones have clear entry and exit rules and named owners.
A reviewed communication matrix
Required connections are recorded with source, destination, service, direction and purpose. Observed traffic informs the analysis but is not copied blindly into the target policy.
Controls at suitable boundaries
Routing, firewalls, NAC, on-premises platforms and cloud boundaries are selected for enforceability and supportability. Logging and troubleshooting belong in the design, not just blocking decisions.
A migration-ready sequence
Pilot, temporary rules, application tests, fallback and approval provide a phased plan. Residual items and consciously accepted risks remain visible after every wave.
The delivery path
Three controlled steps.
- 01
Order applications and flows
Map services, user groups, systems, current boundaries and owners. Prioritise critical and unclear paths.
- 02
Review zones and policy
Agree the target model, technical controls, logging, exception process and operations with the participating teams.
- 03
Migrate in controlled waves
Pilot a representative zone, validate applications and extend policy only after function has been demonstrated.
What we agree before starting
Segmentation reduces paths for attack and failure propagation, but it is not a standalone security guarantee or compliance certification. Application knowledge, identity, hardening, patching, backup and incident response remain necessary. Policy maintenance, platform licences, active testing and service hours are agreed explicitly.
Good to know
Your questions. Clear answers.
Must every application be fully documented first?
Not completely, but critical paths need enough evidence for a safe decision. We combine existing documentation, telemetry and interviews. Unclear connections remain marked and may be observed further before being blocked.
Which technology do you use for segmentation?
That follows the architecture and objective. VLANs and VRFs, firewalls, NAC or group-based policy and cloud controls may work together. We do not select a control merely because it is licensed already or currently fashionable.
Can an existing firewall rule set be retained?
As an input, yes; as an unreviewed target, no. We connect rules to purpose and ownership, identify broad or obsolete access and plan remediation with logging, testing and a safe recovery path.
Let’s discuss your requirements
A few details are enough to begin.
You do not need a finished design. We establish the need, boundaries and a dependable next step.
Discuss network segmentationHelpful for the first conversation
- Applications, systems and responsible teams
- Existing networks, firewalls, VRFs and cloud boundaries
- Traffic evidence and known exceptional rules
- Pilot area, test cases and acceptable interruption
Please do not submit passwords, API keys or confidential network plans through the form.
Explore the technical detail
Why NIS2 makes segmentation a concrete questionTechnical background: Cisco: Configure EAP-TLS Authentication with ISE