Evaluatetheresilienceofyourinternalnetworksagainstinsiderthreatsandlateralmovement.
What Is Internal Network Penetration Testing?
Internal infrastructure penetration testing evaluates the security of your internal network environment by simulating an attacker who has already breached your network perimeter. We assess Windows and Linux environments, Active Directory configurations, and network architecture to identify lateral movement paths and privilege escalation vectors. The goal is to determine how far an attacker could progress once inside your network and what critical assets could be compromised.
Why Do You Need Internal Penetration Testing?
Once an attacker breaches the perimeter, they target your most critical assets — domain controllers, databases, and sensitive file shares. Internal penetration testing reveals how vulnerable your organization is to post-breach scenarios by evaluating Active Directory security, network segmentation, and privileged account protections. Understanding these internal risks allows you to detect and block compromise paths before a real attacker exploits them.
What We Assess
Our internal infrastructure penetration testing covers a full range of post-breach attack techniques across your Windows and Linux network environments.
Internal Penetration Testing Methodology
Internal network engagements simulate an assume breach scenario — replicating the behavior of an attacker who has already obtained an initial foothold inside your environment, whether through phishing, a compromised endpoint, or a malicious insider. The methodology below walks through every phase from network reconnaissance to full Active Directory compromise.
Penteor Testing Appliance (PTA)
For internal infrastructure assessments, we deploy our Penteor Testing Appliance (PTA) directly within your internal network — available as either a pre-configured hardware device shipped to your location or a virtual machine you can deploy in minutes on your existing hypervisor. In both forms, the PTA connects to your internal network and establishes a secure, encrypted tunnel to our testing team, enabling comprehensive internal penetration testing remotely with the same depth and quality as on-site penetration testing.
Your Network
Internal infrastructure, Active Directory, servers, endpoints
Penteor Testing Appliance
Hardware or virtual machine · Plug-and-play · Encrypted tunnel
Penteor Expert Team
Certified testers conduct the full engagement remotely
security testing
Internal Network Penetration Testing Lifecycle
Every internal engagement follows a structured lifecycle built around the assume-breach model — starting with host and Active Directory enumeration, moving through credential attacks and privilege escalation, progressing to lateral movement and domain compromise, and finishing with a prioritized report that maps every attack path to the security controls that would block it.