External vs. Internal Penetration Test
External Penetration Test
An external penetration test simulates an attack originating from the internet without any prior access to internal systems. The assessment focuses exclusively on publicly exposed components such as web applications, services, and network interfaces. The objective is to identify vulnerabilities in the external attack surface and evaluate the effectiveness of security controls such as firewalls, gateways, and access restrictions. Typical findings include misconfigurations, exposed services, and insecure web applications.
Internal Penetration Test
An internal penetration test assumes an attacker with an already compromised foothold (e.g., user account or physical access). The focus lies on analyzing internal networks, systems, and permission structures. The goal is to uncover opportunities for lateral movement and privilege escalation. Common weaknesses include insufficient network segmentation, weak authentication mechanisms, and inadequate access controls.
Summary
External and internal penetration tests address different attack scenarios and complement each other. While external tests assess the exposed attack surface, internal tests evaluate the potential impact of a successful initial compromise. For a realistic security assessment, both approaches should be combined.
Pentest Training
Take a look at the pentest training chapters and learn penetration testing:
- Preface
- Introduction
- Legal Framework
- Hacking vs. Penetration Testing
- Classification
- Meaningfulness of Penetration Tests
- Penetration Testing Standards
- The Hacking Guide
- Hacking I: Scanning networks
- Hacking II: Password attacks
- Hacking III: Web application attacks
- Hacking IV: Privilege Escalation
- Hacking V: Tunnelling Techniques
- Hacking VI: Vulnerability scanner and penetration testing frameworks
- Demonstration of a Penetration Test
- Risk Assessment of Identified Vulnerabilities
- Structure of Documentation and Reporting
- Insider stories: Tales from Dubius Payment Ltd.
binsec academy GmbH – Advanced Pentest Training Lab
binsec academy GmbH operates the Pentest Training Lab, a highly practical online platform dedicated to real penetration testing. Simulating complex corporate networks and advanced real-world attack scenarios within isolated lab environments, it is engineered to sharpen the skills of aspiring and professional penetration testers. Upon conquering our rigorous, fully practical examination, participants earn the distinguished Binsec Academy Certified Pentest Professional (BACPP) designation — proving their technical capability to methodically uncover and evaluate vulnerabilities in modern IT infrastructures.
Explore the Pentest Training Lab
binsec GmbH – Experts in Penetration Testing
As the operative pentesting core of the binsec group, binsec GmbH has provided high-end, human-led penetration testing since 2013. Rejecting automated scans, our permanently employed, certified senior pentest experts deliver manual deep-dive assessments of web applications, APIs, mobile apps, complex network infrastructures, cloud environments, and advanced red team simulations. Specializing in high-regulation sectors like Payment, Banking, and Healthcare, we provide clear risk evaluations and actionable reports to effectively assess your business-critical systems.
Get Manual Expert Penetration Testing Services