Infrastructure & engineering

Infrastructure
built to
withstand.

Physical servers, virtualisation, cloning and system migration. We build your infrastructure on Linux and open-source technologies, secured from the very first line of configuration — not after the incident.

No commitment · Everything under NDA from the first message

Sound familiar?

A server never fails
at a good time.

Most infrastructure failures are not a surprise. They were predictable — nobody had anticipated them.

A server nobody dares to touch

Installed years ago, never documented. The person who set it up has left. Every update is a gamble.

Everything runs on one machine

One hardware failure and the whole business stops. No redundancy, no tested restore, no plan B.

Licences that go up every year

You pay more and more for software you only use a fraction of, and your data depends on a vendor.

A migration to carry out

New hardware, new premises, new architecture: everything has to move without stopping the business or losing data.

What we do

From design
to operations.

Every engagement is designed by a cybersecurity firm: a server is first and foremost a potential target.

01
Design & deployment

Servers sized for your real workload

We design, install and configure your servers for your real workload — neither undersized nor oversized. Every system is hardened and documented before it goes live.

Sizing based on your actual use
System installation and hardening
Full documentation handed over to you
02
Virtualisation

More services, fewer machines, better isolated

We consolidate your services on virtualised infrastructure: each service isolated in its own machine, with rollback available and high availability when your business requires it.

Service isolation
Snapshots and rollback
High availability where needed
03
Cloning & migration

Move a system without losing anything

Cloning of disks, systems or entire servers. Migration to new hardware or to virtualisation, with a planned cutover and a rollback ready at every step.

Disk, system and server cloning
Physical-to-virtual migration
Planned cutover, rollback ready
04
Hardening & maintenance

A secure server stays secure over time

Controlled updates, management of access and privileged accounts, regular configuration reviews. Your infrastructure doesn’t silently degrade.

Hardening to best practice
Privileged access control
Planned and verified updates
Our method

No improvising
on your production.

01

Assessment

We analyse what you have: hardware, systems, dependencies, risks. You know exactly where you stand.

02

Proposed architecture

A written, costed and reasoned proposal. What we do, why, and what it changes for you.

03

Deployment or migration

Planned execution outside your critical hours, with a rollback ready at every step.

04

Follow-up

Maintenance under contract, or full handover to your team with all the documentation. Your choice.

What you get

What you get.
Not just machines.

Documented infrastructure

Diagrams, access, procedures. The documentation belongs to you — it doesn’t stay with us.

Tested backup and restore

A backup that has never been restored is only a hypothesis. We test it.

No vendor lock-in

Linux and open-source technologies: no imposed licences, auditable code, your data under your control.

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.

Storage, backup & recovery

NAS, tested backups and disaster recovery planning.

View the service

Secure networks & Wi-Fi

Segmentation, professional Wi-Fi and secure remote access.

View the service

Backups that actually work

Our article: what a backup must deliver on the day you need it.

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