Cybersecurity

Let’s find the flaw
before
the attacker does.

We test your systems the way a real attacker would, then explain what we found in business terms, with a prioritised remediation plan.

No commitment · Everything under NDA from the first message

Sound familiar?

You think you’re protected.
Let’s check.

A forgotten setting, overly broad access, an exposed service: one open door is enough.

You’ve never had a security review

Nobody has looked at your infrastructure through an attacker’s eyes. The flaws exist — nobody has looked for them.

A client or an audit requires it

A partner, an insurer or a certification asks for proof that your security has been tested.

You’ve had an incident

You want to know how the attacker got in, and be sure no other door is left open.

Your infrastructure has changed

New website, new application, move to the cloud: every change creates new attack surfaces.

What we do

An attacker’s eye,
working for your defence.

Tests carried out by senior engineers, within a scope defined and approved with you.

01
Configuration audit

What’s misconfigured, before it’s exploited

Review of your servers, workstations, network, email and cloud services: settings, access, updates, exposure.

Servers, network and cloud
Accounts and access rights
Internet exposure
02
External penetration test

What an attacker sees from the internet

We attack your exposed perimeter the way an outsider would: websites, services, remote access.

Websites and web applications
Remote access and email
Exposed services
03
Internal penetration test

What happens once inside

We simulate a compromised machine or a malicious insider to measure how far an attacker can go.

Lateral movement
Privilege escalation
Access to sensitive data
04
Report & debrief

Results you can actually fix

An executive report for management, a technical report for the team, and a live debrief.

Risks ranked by priority
Concrete remediation plan
Retest after remediation
Our method

A clear framework,
no surprises.

01

Scoping

Together we define the scope, dates and rules of engagement. Everything is in writing.

02

Testing

We run the tests within the agreed scope, without disrupting your business.

03

Debrief

We present the results to management and to the technical team.

04

Retest

After your fixes, we check the flaws are really closed.

What you get

What you get.
Not an endless list.

A readable report

A summary for management, technical detail for those who fix.

Clear priorities

What to fix first, and why.

Full confidentiality

Engagement under NDA, results delivered only to designated people.

Why Security255

Experts trained
in real situations.

Over 23 years in the field

We have protected systems of every kind. We know how attackers think, because we have learned to stop them.

A senior team, always

The team that answers your first call is the one that works on your case.

Confidential from minute one

Everything is covered by NDA from the first contact. What you share with us stays here.

Go further

Related services and resources.

Continuous protection

After the audit, keep a permanent eye on your infrastructure.

View the service

Compliance & awareness

Prepare for GDPR, NIS2, nFADP and ISO 27001 audits.

View the service

What to look for before hiring a pentest

Our article to choose the right provider.

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