Infrastructure & engineering

A network
where every device
stays in its place.

We design and deploy segmented, filtered and documented business networks and professional Wi-Fi. An intrusion on one machine must never open access to everything else.

No commitment · Everything under NDA from the first message

Sound familiar?

A flat network
is a highway for attackers.

When everything talks to everything, a single compromised device is enough.

Everything is on the same network

Workstations, servers, printers, cameras and guests share one network, with no separation.

Guest Wi-Fi opens up your systems

Visitors and personal devices connect to the same network as your data.

Nobody knows what’s plugged in

No inventory, no diagram: impossible to know what’s moving across the network.

Remote access is fragile

Remote work and contractor access rely on improvised solutions.

What we do

Segment, filter,
control.

A network architecture designed for security from the start.

01
Network architecture

A network designed, not accumulated

Design of your business network, cabling, switching and routing, with an up-to-date diagram.

Review of the existing setup
Design and diagram
Deployment and configuration
02
Segmentation

Every use in its own zone

Separation of workstations, servers, equipment, guests and connected devices, with clear traffic rules.

Zones separated by use
Rules between zones
Connected devices isolated
03
Professional Wi-Fi

Reliable, secure coverage

Coverage survey, professional access points, appropriate authentication and a fully isolated guest network.

Coverage survey
Appropriate authentication
Isolated guest network
04
Firewalls & remote access

What goes in and out is controlled

Firewalls, filtering, VPN for remote work and contractors, access logging.

Traffic filtering
VPN for remote work
Controlled contractor access
Our method

From the plan
to the network in production.

01

Survey

Inventory of current equipment, traffic and uses.

02

Design

Target architecture, zones, rules and migration plan.

03

Deployment

Gradual rollout, without prolonged interruption to your business.

04

Documentation

Diagrams, configurations and procedures handed over to your team.

What you get

What you get.
A network you understand.

Up-to-date diagrams

You know what’s plugged in and how everything communicates.

Real segmentation

An incident stays confined to its zone.

Controlled access

Every remote access is identified, filtered and logged.

Why Security255

Systems engineers
who think like attackers.

Over 23 years on Linux

Systems engineering is where we come from. We don’t discover your systems — we know them from the inside.

Open source and sovereignty

Open, auditable and long-lasting technologies. Your infrastructure doesn’t depend on a vendor’s commercial policy.

Security first

We are a cybersecurity firm. Segmentation, encryption and access control are part of the project, not an option.

Hardware supply: we specify, supply and integrate the hardware required as part of the project.

Go further

Related services and resources.

Servers & virtualisation

The infrastructure your network serves.

View the service

Continuous protection

Permanently monitor what moves across the network.

View the service

Managing access during rapid growth

Our article on access management.

Read the article

Ready to
work together?

If someone recommended you speak with us, that recommendation already carries more weight than any sales argument. Tell us who you are and what you protect.

NDA GDPR LPD
Available right now Direct response within 24 business hours
First conversation, no cost
30 minutes to see if we're a fit. No commitment on either side.
Total confidentiality
Everything you share is covered by NDA from the first message.
Direct access to the team
A member of the technical team responds. No intermediaries.

Request access

Tell us about your company. We handle the rest.

✦ Request received. A senior professional will contact you within 24 hours.

Information handled under NDA · GDPR · LPD/nLPD — absolute confidentiality.

Relevant information

Protect your business from

digital risks.

Resources

Access resources and content relevant to your business.

Open Resources

Actions after an attack

Critical steps to regain control after a cyberattack

Read article

Local presence

Cybersecurity services for businesses in Annecy.

Learn more