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Speak to an expert
Protect your digital foundations from cyber threats with our award-winning, CREST-approved infrastructure penetration testing services.
Your organisation’s IT infrastructure is the backbone of its operations, but hidden vulnerabilities can leave it exposed to cyber threats. Our Infrastructure Penetration Testing Services provide a thorough assessment of your internal and external networks, identifying weaknesses before malicious actors can exploit them.
As an award-winning, CREST-approved penetration testing service provider, you can trust not only our credentials but also our proven methodology. In addition, we bring industry-leading expertise to reliably uncover and address vulnerabilities in your IT infrastructure.
Our team of certified penetration testers (CREST, OSCP, CISSP) have received 100s of genuine 5-star reviews from our clients. When you work with Assure Technical, you can rest assured that you’ll be in safe hands.
Our bespoke, risk-based approach effectively identifies security gaps in your external, internal, cloud, active directory, wireless and firewall environments as required. Post assessment, you will receive a detailed report with clear remediation steps to strengthen your security.
On-premises, cloud, and hybrid infrastructures all present unique security risks. That’s why we offer CREST-approved testing tailored to your environment. We assess external systems, internal networks, cloud setups, firewalls, VPNs, wireless networks, and more. As a result, you can identify vulnerabilities early and ensure your infrastructure stays secure, resilient, and compliant.
We assess internet-facing systems - like web servers, email gateways, VPNs, and DNS - for remotely exploitable vulnerabilities. In doing so, we identify open ports, outdated software, weak encryption, and exposed services. As a result, you gain assurance that your external perimeter is secure and resilient against real-world threats.
Internal systems are at risk from malicious insiders or attackers with initial access. As such, we test workstations, servers, and internal services for weak configurations, unpatched systems, poor segmentation, and excessive privileges. This, in turn, helps you strengthen your defences from the inside out.
We assess your cloud environments - AWS, Azure, and GCP - for misconfigurations, insecure APIs, exposed storage, and excessive access. In doing so, we ensure your setup aligns with best practices and is secured against platform-specific threats.
Wireless networks, if poorly secured, can offer attackers easy access. For this reason, we test for weak encryption, rogue access points, MITM risks, and poor guest network separation. As a result, your Wi-Fi remains secure both technically and procedurally.
Active Directory is a key target for attackers seeking privilege escalation. Therefore, we assess domain controllers, user roles, password policies, and trust relationships to uncover misconfigurations. This helps prevent potential domain compromise and strengthens your internal security posture.
We review firewall rules, segmentation, VPN access, and intrusion settings to ensure your perimeter is properly configured. In addition, we identify overly permissive access, misrouted traffic, and gaps in network isolation - helping you close potential security loopholes.
Proactive infrastructure penetration testing is key to staying ahead of evolving cyber threats. By identifying and addressing vulnerabilities early, you reduce the risk of costly breaches and service disruption. Consequently, your organisation remains secure, resilient, and aligned with industry best practice – giving you and your stakeholders greater peace of mind.
By conducting regular, proactive testing, you can detect infrastructure weaknesses before threat actors exploit them. In doing so, you reduce the risk of data breaches, service outages, and reputational damage - protecting your business from preventable harm.
Ongoing penetration testing helps validate your existing security controls while uncovering targeted areas for improvement. As threats evolve, this approach ensures your infrastructure remains resilient, up to date, and aligned with cyber security best practice.
Unchecked vulnerabilities can lead to downtime, data loss, and financial impact. However, by addressing risks early through testing, you maintain operational continuity and reduce the likelihood of costly disruptions to your services.
Many frameworks, such as Cyber Essentials, PCI DSS, GDPR, DORA, ISO and SOC2 require demonstrable security measures. Proactive testing, therefore, helps you meet these requirements and evidences due diligence in protecting sensitive data.
Robust, independent testing demonstrates that your organisation takes cyber security seriously. As a result, it boosts trust among clients, partners, and regulators - reassuring them that your systems are secure and well-managed.
Penetration testing provides clear, prioritised insights into your infrastructure risks. Consequently, your teams can take focused action, allocate resources effectively, and make strategic decisions that enhance long-term security.
In today’s digital era, cyber breaches are inevitable; posing significant operational, financial, and reputational threats to your business.
Importantly, penetration testing is amongst the most effective strategies to bolster your cyber security defences.
Download a complimentary copy of our comprehensive guide today. It covers all you need to know about penetration testing, enabling you to make an informed decision on how it could benefit your business.
Don’t wait until a cyberattack exposes your vulnerabilities. Our Infrastructure Penetration Testing Services help you identify and remediate security risks before they become a threat.
Typical UK costs are £750–£1,500 per day. A small external assessment may require 1–2 days, while multi-site or hybrid cloud environments can take a week or more. At Assure Technical, we provide fixed-price quotes with confirmatory checks, to review fixes without additional cost. Moreover, the Cyber Security Breaches Survey 2025 shows 43% of UK businesses identified a breach in the past year, underlining why proactive testing is essential. Therefore, penetration testing is both a security and compliance investment.
Duration depends on system size and complexity. A focused external perimeter test may complete in 1–2 days. However, broader internal, wireless and cloud testing can extend to 5–7+ days. Lead times are typically 2–4 weeks, although urgent projects can sometimes be expedited. In addition, we offer out-of-hours testing to reduce disruption. For combined assurance across both infrastructure and applications, see our Application Penetration Testing service.
A typical scope includes:
At Assure Technical, consultants perform manual testing supported by selective tools. Moreover, we focus on attack chains that real adversaries would exploit, ensuring remediation prioritises true business risk. For accreditation-style outputs, see our IT Health Check (ITHC).
We follow NCSC buyer guidance and apply CREST-recognised methodologies for safe, structured and realistic testing. Engagements are carefully scoped, and higher-risk checks are scheduled in controlled windows. Moreover, our approach reflects attacker behaviour, such as lateral movement across identity systems. Therefore, results are practical, reproducible, and suitable for leadership reporting.
You will receive:
In addition, we run a wash-up session to ensure all findings are understood. To complement this, consider our Social Engineering services to strengthen staff awareness and behaviour.
All testing is carried out by Assure Technical, and importantly, we are listed on recognised penetration testing provider registers. Moreover, our consultants are thoroughly vetted and have extensive experience working with both UK enterprises and public-sector organisations. As a result, every penetration test we deliver aligns with industry and regulatory expectations. Finally, you can trust the findings to be accurate, credible, and genuinely valuable for strengthening your security posture.
Infrastructure testing focuses on on-premise systems: networks, VPN, Active Directory, segmentation and device builds. In contrast, cloud testing assesses Azure, AWS, or GCP environments – including identity permissions, policy configuration, storage, and exposed services. However, attackers often chain both. Therefore, many organisations choose a hybrid test. For application risks, see Application Penetration Testing; for cultural resilience, see Social Engineering.
Infrastructure penetration testing provides strong evidence of control effectiveness for ISO 27001, Cyber Essentials Plus, and PCI DSS. By aligning with NCSC best practice and delivered by a CREST-registered company, so the outputs are auditor-ready. As a result, a single engagement can help both reduce cyber risk and progress compliance objectives. For public sector-focused assurance, see our IT Health Check (ITHC).
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