What is Penetration Testing (Pentest)?

What it does

Penetration testing simulates an attacker's techniques against a defined target. A tester, or an automated platform, attempts to:

• Discover exposed services, misconfigurations, and software vulnerabilities
• Exploit those weaknesses to reach sensitive data or privileged access
• Map attack paths through networks, Active Directory, or cloud environments
• Document every finding with evidence, severity ratings, and reproduction steps

The output is a written report. That report tells the organization exactly what was broken, how it was broken, and what to fix first.

Tooling in this category ranges from standalone frameworks like Metasploit for exploiting known vulnerabilities, to web-application proxies like Burp Suite Professional for intercepting and manipulating HTTP traffic, to graph-based tools like BloodHound for visualizing Active Directory attack paths. Login crackers such as thc-hydra test authentication strength. Reporting platforms like Dradis CE help teams organize findings and write consistent reports. Newer platforms offer AI-assisted or autonomous testing agents that run discovery and exploitation steps without a human driving every action.

Penetration Testing as a Service (PTaaS) wraps tooling and human testers into a subscription or on-demand model, delivering results through a portal rather than a PDF.

Why teams buy it

• Compliance frameworks (PCI DSS, SOC 2, ISO 27001, HIPAA) require periodic penetration tests
• Boards and insurers ask for evidence that controls actually stop attacks, not just that controls exist
• Internal security teams want to find exploitable paths before a real attacker does
• Development teams need proof that a new application is safe before launch

What to look for

• Scope flexibility: Can the tool or service cover web apps, internal networks, cloud, and Active Directory?