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Penetration testing

What is penetration testing?

Penetration testing is an authorised, simulated attack on a system to find the weaknesses a real attacker would use. A tester takes the role of an adversary and tries to break in, escalate access, and reach data they should never see. The goal is defensive. You find the holes on your own terms, with permission, and fix them before anyone hostile does.

Tests come in a few shapes depending on what the tester starts with. Black box means no inside knowledge, mimicking an outsider. White box gives full access to code and architecture, which is faster and more thorough. Grey box sits between the two. Scope can cover web applications, APIs, network infrastructure, or the people themselves through social engineering. A test might find a login form that leaks whether a username exists, then chain that into a working account takeover. Every finding comes with a severity rating and a path to remediation.

A pen test is a point-in-time check, not a permanent guarantee. Code changes, dependencies update, and new weaknesses appear. Serious teams run tests on a schedule and after major releases, treating each one as a snapshot of where the system stands today.

Penetration testing at Dallonses

Security is something we build in, not bolt on. We write code defensively from the start, validate every input, and treat anything coming from a user as untrusted. When a project needs formal penetration testing, we scope it with the client, coordinate with specialist testers, and own the remediation work that follows.

This connects directly to how we run QA strategy and governance. Findings feed back into the software quality assurance process, so the same class of bug does not return in the next release. We have shipped systems for brands where a breach would be a serious problem, and the relationship depends on us being straight about what is hardened and what still needs work.

Need to know where your system would break under a real attack? Let's find out safely.

Talk to us about security

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Aymón holding a Tools magazine in front of their facem
Ari working on a laptop outdoors surrounded by plants
Top-down view of a wooden desk with a keyboard, mouse, and headphones
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Nico leaning against a water cooler next to a fire extinguishe
Close-up of an open computer with circuit board and components on a wooden desk
Bernat and Andreu collaborating at a desk with monitors and a laptop
Hand-drawn illustration of an open hand waving
Aymón holding a Tools magazine in front of their facem
Ari working on a laptop outdoors surrounded by plants
Top-down view of a wooden desk with a keyboard, mouse, and headphones
Hand-drawn illustration of a hand snapping fingers
Nico leaning against a water cooler next to a fire extinguishe
Close-up of an open computer with circuit board and components on a wooden desk
Bernat and Andreu collaborating at a desk with monitors and a laptop
Hand-drawn illustration of an open hand waving