Strengthen Security From The Inside Out

Internal Infrastructure Penetration Testing

Internal networks often run on trust, which makes them attractive targets once someone gets inside. A single weak setting or overlooked machine can allow attackers to move freely, escalate privileges, and reach sensitive data.

Our testing shows you exactly how that could happen. We simulate real attacks across your internal environment, from Active Directory and user devices to servers, Wi-Fi, and firewalls, revealing the paths an insider or compromised account could take.

You get a clear view of hidden weaknesses that external testing cannot reach, along with practical steps to shut them down. The result is a stronger, more resilient network that keeps your operations running securely.

Good Things To Know

Identifies vulnerabilities an attacker could exploit inside a network
Checks AD security, password policies, & privilege escalation risks
Reviews endpoint & server builds against benchmarks (CIS, NCSC, ISO)
Tests Wi-Fi, VLAN segregation, & firewall configurations for errors
Detects sensitive data exposure & potential data exfiltration risks
Provides actionable remediation guidance to strengthen resilience

Internal Infrastructure Penetration Testing FAQs

What is Internal Infrastructure Penetration Testing?

It’s a security assessment carried out from within your internal network, simulating what an attacker or insider could do if they gained access to your infrastructure.

The test identifies vulnerabilities in Active Directory, end user devices, applications, network segmentations and more.

Why is Internal Infrastructure Penetration Testing important?

Internal Infrastructure Penetration Testing is important because perimeter defences such as firewalls and intrusion detection systems only provide one layer of protection.

If that layer is bypassed through a phishing email, stolen VPN credentials, or a rogue insider, internal weaknesses could allow a full domain compromise. Internal testing helps identify and close these gaps before attackers can exploit them.

Who benefits from Internal Infrastructure Penetration Testing?

Any company with an internal network, Active Directory, or on-premises/hybrid infrastructure.

It’s especially valuable for enterprises with hybrid IT environments, compliance requirements, or sensitive data handling obligations.

When should Internal Infrastructure Penetration Testing be performed?

It should be carried out annually or after significant changes to infrastructure, such as Active Directory upgrades, new site rollouts, or firewall/wireless redesigns.

Ongoing testing helps to ensure that the company is effectively mitigating common risks.

How is Internal Infrastructure Penetration Testing conducted?

We combine automated scanning with manual exploitation techniques.

Typical activities include privilege escalation, password cracking, configuration reviews, lateral movement testing, Wi-Fi compromise attempts, and data exfiltration simulations.

Tests can be conducted as black box (no prior knowledge), grey box (partial knowledge), or white box (full disclosure).

What systems are covered in an Internal Infrastructure Penetration Test?

We can test Windows, Linux, Active Directory, VMware, network devices, wireless infrastructure, and hybrid/cloud-connected systems.

Reviews can also be benchmarked against standards such as CIS, NIST, and ISO.

Is the Internal Infrastructure Penetration Test carried out on-site or remotely?

The deployment model typically determines whether the assessment is conducted on-site or remotely.

For primarily on-premises infrastructure, on-site testing is preferred to ensure full visibility and access.

For hybrid or cloud-based environments, testing can be conducted remotely, provided the necessary tools, credentials, and access permissions are in place to assess the environment effectively.

What support do I get during the Internal Infrastructure Penetration Test?

You will have direct and dedicated access to our consultants throughout the engagement.

We provide daily progress calls, immediate alerts for any findings above an agreed CVSS severity level, and ongoing communication to minimise disruption to your business operations.

Our team conducts all work with professionalism and discretion, and we are available to answer any questions you may have during (and after) the test.

What do I receive after the Internal Infrastructure Penetration Test?

You will receive a comprehensive, prioritised report detailing all identified vulnerabilities, misconfigurations, and security risks. Each finding is accompanied by practical remediation guidance to help your technical teams implement fixes effectively.

The report is concise and bloat-free, focusing on the essentials to provide clear, actionable insight for both technical staff and management. To aid understanding, where practical, we supplement the report with video demonstrations of exploits, showing your team exactly how vulnerabilities were identified and exploited.

If required, a debrief session is included to review the results and discuss next steps.

Is Internal Penetration Infrastructure Testing cost-effective?

Yes.

Identifying weaknesses in your internal environment reduces the likelihood of large-scale breaches and regulatory penalties. It’s far cheaper to address misconfigurations and weak controls proactively than to suffer an incident or ransomware attack.

Regular penetration testing also helps avoid costly incidents, supports compliance, and demonstrates due diligence to clients and regulators.

Get In Touch

Our team is available to help you with your next Penetration Test, Cloud Security Audit, or Cyber Essentials Assessment.

Whether you are launching a new platform, expanding an existing service, reviewing your defences, or strengthening your security posture, we can provide a tailored engagement that meets your specific needs and scope.

Contact us today to discuss your requirements and see how we can help you protect your business with confidence.

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