Internal & External Network Penetration Testing

Safeguard your organization with globally trusted security assessments.

Simulate Real Attacks. Strengthen Real Defenses.

Nullayer delivers precision-driven penetration testing to identify and exploit vulnerabilities across your internal and external networks—before adversaries can. 

Know Your Network. Know Your Risks.

Networks are the foundation of your organization’s digital operations—and often the first line of attack. Misconfigurations, outdated systems, exposed services, and weak credentials present opportunities for attackers. Nullayer simulates real-world intrusion scenarios to uncover weaknesses and help you build stronger defenses from the inside out. 

What We Cover

External Penetration Testing

We test your internet-facing infrastructure just like a real-world attacker—from outside your firewall.

  • Public IP ranges and exposed services 
  • Firewalls, VPNs, RDP, SSH, and other remote access points 
  • Email and DNS infrastructure 
  • Misconfigured or outdated perimeter systems 
  • Credential stuffing and brute-force vulnerabilities 
  • Unintended data exposure 

Internal Penetration Testing

We simulate a breach from within your network—whether by a compromised machine, insider threat, or lateral movement from an initial foothold. 

  • Lateral movement and privilege escalation 
  • Network segmentation and isolation failures 
  • Active Directory misconfigurations 
  • Insecure protocols and legacy systems 
  • Credential harvesting and token abuse 
  • Access to sensitive data and systems 

Our Process

Scoping and Discovery

We work with you to define the goals, review your environment, and establish testing parameters to ensure a safe and focused engagement.

Exploitation

Using proven techniques and custom tooling, we identify and exploit vulnerabilities to demonstrate how an attacker could gain control

Post-Exploitation Analysis

We evaluate how deep an attacker could go, what they could access, and how they could maintain persistence or escalate privileges.

Reporting and Debrief

You receive a detailed, actionable report with severity-ranked findings, technical impact, and clear remediation guidance. A debrief session is included to walk your team through the results.

Why Choose Nullayer

Specialized Focus

We concentrate on core network and infrastructure security—not just surface-level assessments.

Manual, Realistic Testing

All testing is performed manually by experienced penetration testers. We don’t rely on automated tools to do the work for us. 

Real-World Scenarios

Our methodology reflects actual adversary behavior, including techniques mapped to frameworks like MITRE ATT&CK.

Action-Oriented Results

Beyond identifying vulnerabilities, we help your team prioritize and remediate them with clarity and precision.

Ready to Test Your Defenses?

Your perimeter and internal network could be an attacker’s easiest path in. Let us find the weak points—before someone else does.