Pentesting External IT Infrastructure
An external penetration test at Exfilion does not begin with tools, but with a clear question: What can actually be compromised from the outside?
We operate from the perspective of a real attacker. No internal knowledge, no privileged access, no assumptions. The starting point is limited to what is publicly exposed: domains, IP ranges, APIs, and cloud resources. From there, we go deeper in a systematic way, not broadly, but along realistic attack paths.
The first step is precise reconnaissance & OSINT. We map your external attack surface using publicly available data such as DNS structures, certificates, subdomains, leaked information, and cloud exposure. The result is not a superficial inventory, but a credible attack model.
This is followed by enumeration on both protocol and application level. We identify reachable services over TCP and UDP, analyze versions, endpoints, authentication mechanisms, and API structures.
The real depth comes from manual analysis. No automated scans with generic output, but targeted assessment of vulnerabilities, misconfigurations, and insecure design decisions. What matters is not whether something is theoretically vulnerable, but whether it can be turned into a workable attack.
Once a valid attack path emerges, we move to controlled exploitation within the defined scope. Vulnerabilities are validated through clear proof-of-concepts, precise, reproducible, and focused on impact. If required, we also assess how far initial access can be extended, including lateral movement, privilege escalation, and access to additional systems or data.
Typical scope includes external network and perimeter assets, web applications, APIs, VPN access points, mail infrastructure, and publicly exposed cloud resources. Scope boundaries are defined upfront, clearly and without ambiguity during the assessment.
Our methodology is informed by established standards such as the OWASP Testing Guide, OSSTMM, and the Penetration Testing Execution Standard (PTES). These serve strictly as a baseline. The real depth comes from our practical, offensive approach, focused on real-world attack techniques and actual compromise scenarios rather than formal compliance.
The outcome is not a list of isolated findings, but a clear statement: Which attack paths exist and how far an attacker can actually get.
Competence
Exfilion testers deliver proven offensive capability, not theory. Our team consists of experienced hacking experts with hands-on certifications such as
OSCP (Offensive Security Certified Professional),
CRTO (Certified Red Team Operator), and
BACPP (Binsec Academy Certified Pentest Professional).
Together, the Exfilion team combines decades of experience in offensive assessments, red teaming, and deep technical analysis. This experience was built under real-world conditions and not in lab environments.
Pentest Guidelines
Standards are the baseline. Exfilion goes far beyond.
Standards and regulatory frameworks define the minimum. They outline what should be tested, but not how far a real attack can go. They provide structure, but not security.
Many assessments stop where requirements are fulfilled. Checklists are completed and controls are marked as compliant. This is where blind spots emerge, because real attackers do not follow standards, they follow opportunities.
Exfilion uses standards as a starting point, not a boundary. Through experience, technical depth, and creative offensive approaches, we go beyond them to uncover vulnerabilities that remain invisible in conventional assessments.
Your provider for External pentest
Exfilion stands for deep technical, manual penetration testing at elite level with a clear focus on real attack paths. We do not operate by checklist and not in the style of traditional pentest providers. Our objective is to realistically compromise systems and expose their true attack surface under real conditions. Exfilion is the specialized provider in Germany for External penetration test at elite level.
