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Find your critical infrastructure weaknesses – fast 

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What makes us different? 

Our infrastructure penetration testing services are more than a compliance checkbox. We work with you to provide: 

Expert guidance at every stage

From scoping to remediation, our specialists ensure you understand the process, the results, and the actions needed to strengthen your defences. 

Real-world attack scenarios 

We replicate the tactics, techniques, and procedures (TTPs) used by real attackers — from phishing and lateral movement to firewall misconfiguration exploits. 

Tailored, risk-based approach

Every network and organisation is unique. We adapt our testing to your environment, technologies, and industry-specific threats. 

What we test

Our infrastructure penetration testing covers the attack surfaces most often targeted. All tests are manual-first, with evidence to back up findings and clear remediation steps. Optional retesting validates fixes. 

External infrastructure

Internet-facing hosts, ports, and services; firewall and VPN exposures; patch and configuration weaknesses.

Internal/Active Directory

Privilege escalation, lateral movement, misconfigurations, password policies, domain controller security.

Wireless & network segregation

Wi-Fi encryption and authentication, rogue access points, VLAN segmentation, guest network isolation.

Firewall and build reviews

Ruleset misconfigurations, unnecessary open ports, insecure protocols, baseline hardening checks.

Red team assessments

Full-scope adversary simulation to test detection, response, and resilience across people, processes, and technology.

Meet the experts behind your cloud security

60+

Years of combined expertise in infrastructure and network security 

1000+

Hours of testing each year, including external, internal, and AD exploitation 

1:1

Expert guidance throughout the engagement

~1,500

Active pen test accounts across industries

Book your scoping session - limited slots available

Don’t leave vulnerabilities in your network infrastructure to chance. Speak to a CREST-accredited tester in the next 24 hours – no obligations.

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Real world reviews

I always find [GRC Solutions] easy to work with. The consultant involved was very professional and friendly, providing plenty of updates throughout the test and clearly explained his findings. ”

Gordon

Good grief, what an eye-opener this was! We chose [GRC Solutions] because the initial scoping call revealed their pen testers had heard about our not-so-common software setup and their cost was more realistic than the other quotes. ”

Tim

It was a pleasure to work with the [GRC Solutions] team for this pen testing project - from clear guidance from the account manager through to regular updates from the testers themselves. Will use again.”

Tom

Working with the [GRC Solutions] team is nice and straightforward. Account management and technical functions are good and thus far we've had no real issues.”

Eric

We always use [GRC Solutions] and this service consistently hits the mark for our clients in terms of expectation. Both Pen Team and Account Managers work with our clients in a professional manner.”

Pedro

We've just concluded an annual, 2 week, Penetration Test programme with [GRC Solutions], & I'm pleased to report that the service on offer remains excellent.”

Wez

It has been an absolute pleasure working with [GRC Solutions], they made the process from start to finish so straight forward.”

Heather

Frequently asked questions

A simulated attack on your external or internal networks to uncover vulnerabilities before real attackers exploit them.

Yes. Our testers assess AD for misconfigurations, privilege escalation risks, and lateral movement opportunities.

Infrastructure testing focuses on specific assets (e.g. external perimeter, internal AD, wireless). Red teaming simulates a full-scale attack across people, processes, and technology to test your defences end-to-end.

Yes. We assess Wi-Fi authentication, encryption, and segregation controls to prevent rogue devices from gaining access.

  • Executive summary for stakeholders
  • Technical findings with severity ratings
  • Step-by-step remediation guidance
  • Optional retesting to confirm fixes

Book a free scoping session

Hands-on testing | UK-based experts | Dedicated pen tester

Book a free scoping session with Our CREST-accredited penetration testers and get tailored advice on real-world security risks to your networks, systems, and controls.