Infrastructure Penetration Testing

Expert-led, manual infrastructure penetration testing, from your perimeter to your domain controllers.

Your network infrastructure is the backbone of your organisation, and one of the most targeted attack surfaces in cybersecurity. Our CREST-accredited consultants test it the way a real attacker would: manually identifying, chaining, and exploiting vulnerabilities across your external perimeter and internal network, going well beyond what automated vulnerability scanning can surface.

Infrastructure Testing Overview

What Is An Infrastructure Penetration Test?

An infrastructure penetration test is a structured, expert-led security assessment of your IT network, covering the systems, services, and devices that make up your internal and external environment. Our consultants actively attempt to identify and exploit vulnerabilities, misconfigured services, and weak access controls to understand the real-world impact of a successful attack on your network.

Infrastructure testing is one of the most common drivers of compliance requirements. Whether you’re working towards ISO 27001 certification, undergoing an IT Health Check (ITHC), or simply building confidence in your network security posture, a thorough manual assessment is the most reliable way to understand your true exposure.

Infrastructure Test Coverage

What Our Infrastructure Testing Covers

Our testing is scoped to your environment and delivered manually by our consultants, supported by specialist tooling where appropriate. We don’t run a vulnerability scanner and call it a penetration test, every finding is the result of active manual investigation.

Network Architecture & Segmentation

> Assessment of network design, VLAN configuration, & traffic segmentation
> Identification of unintended access paths between network zones
> Firewall rule review and egress filtering assessment

Network Devices

> Security configuration of routers, switches, firewalls, and load balancers
> Default credentials, weak authentication, and management interface exposure
> Firmware version analysis and known vulnerability identification

Active Directory & Domain Security

> Enumeration of domain users, groups, trusts, and Group Policy Objects
> Testing for Kerberoasting, Pass-the-Hash, and lateral movement paths
> Identification of privilege escalation routes to Domain Admin

Operating Systems & Patch Management

> Missing security patches and end-of-life software across live systems
> OS hardening assessment against industry baselines (CIS, NCSC)
> Identification of exploitable vulnerabilities in unpatched services

Service Configuration & Authentication

> Weak or default credentials across network services and management interfaces
> Insecure protocols in use - Telnet, FTP, SNMPv1/v2, NTLMv1, and others
> Authentication bypass and privilege escalation via misconfigured services

Data Exfiltration & Access Controls

> User role and privilege configuration across systems and services
> Data loss prevention controls and exfiltration route identification
> Access to sensitive shares, databases, and critical internal resources

Infrastructure Test Approach

How We Approach Infrastructure Testing

Our infrastructure testing covers the two main aspects of your IT network:

External Network Testing

Your external infrastructure is your public-facing attack surface, everything visible and reachable over the internet. Because it's publicly accessible, it can be discovered and targeted by attackers anywhere in the world, making it one of the highest-risk areas of your network.

Our external infrastructure testing identifies what you have exposed, uncovers vulnerabilities in internet-facing services, and actively attempts to establish a foothold on your network, the same first step a real attacker would take.

What our external testing covers:
> Discovery and enumeration of internet-facing assets and services
> Vulnerability identification and manual exploitation of exposed services
> Firewall and perimeter control assessment
> Attempted network ingress and foothold establishment

Internal Network testing

Your internal network is the environment an attacker reaches after bypassing your perimeter, or one an insider threat already operates within. Internal testing assesses what a malicious employee, compromised supplier, or attacker who has gained initial access could realistically achieve.

Our internal infrastructure testing maps your internal attack surface, identifies lateral movement paths, and assesses how far an attacker could escalate privilege, up to and including full domain compromise.

What our internal testing covers:
> Active Directory enumeration and attack path analysis
> Lateral movement and privilege escalation to Domain Admin
> Access control and user role configuration assessment
> Identification of sensitive data exposure and exfiltration routes

Our Test Process

Putting Your Infrastructure To The Test

Every infrastructure penetration test goes through a rigorous process to ensure you get the best possible results. Below we outline the key stages our testing goes through:.

Understand Your Requirements

No two networks are the same. We begin every engagement by understanding your environment, your compliance requirements, and what a successful test looks like for you, before putting forward a bespoke scoping proposal. Whether you need external-only, internal-only, or a combined assessment, we'll scope it precisely to your needs.

Manual, Expert-Led Testing

Your test is carried out by consultants with deep experience in network and infrastructure security. We use industry-standard tooling to support discovery and enumeration, but every finding is validated through manual exploitation, not automated output. This means real attack paths, confirmed impact, and findings your development and IT teams can act on with confidence.

Reporting Tailored To Your Organisation

Our reports are written for real audiences, not generated by a tool. Technical findings include full exploitation detail, confirmed impact, and clear remediation guidance for your IT and security teams. Executive summaries give leadership and compliance stakeholders what they need. Where required, we can map findings to specific compliance frameworks including ISO 27001 and PCI DSS.

Post-Test Remediation Support

We remain available after delivery to answer questions, support remediation prioritisation, and provide fix checks to confirm vulnerabilities have been resolved. Additional documentation for ISO 27001, ITHC, or PCI DSS audit purposes is available on request.

Contact Us

Find Out More About Our Infrastructure Penetration Testing

Ready to find out what a manual, expert-led assessment reveals about your network? Fill in the form below and a member of our team will be in touch within one business day to discuss your requirements.

Infrastructure Insights

The Latest Insights From The Pentest Team

The threat landscape doesn’t stand still, and neither do we. Our consultants invest in ongoing security research, CTF competitions, and responsible vulnerability disclosure to stay at the cutting edge of offensive security. The techniques we develop in the lab are the techniques we bring to your engagement.