Network & Infrastructure Testing
Penetration testing for your network and infrastructure
Infrastructure Security Testing
What is network and infrastructure penetration testing?
Network and infrastructure penetration testing simulates real-world attacks against your network devices, servers, perimeter services, and internal systems to identify what an attacker could actually exploit.
It covers both external testing, assessing what is exposed and reachable from the internet, and internal testing, which focuses on what an attacker or compromised insider could access once inside your network. Together, they give a complete picture of your network security posture.
Infrastructure testing is approached differently from application testing. Where application security focuses on software vulnerabilities in web apps and APIs, infrastructure testing focuses on network-level weaknesses, service misconfigurations, unpatched systems, and trust boundary failures between network segments.
Infrastructure Testing Services
Network and infrastructure security testing services
We provide infrastructure and network security testing covering both internet-facing perimeters and internal environments. Each engagement is manually conducted by an in-house consultant, fixed-price, and scoped to your environment.
External Network Penetration Testing
Simulate attacks against your internet-facing infrastructure. We identify exposed services, test firewall and remote access configurations, and determine what an unauthenticated attacker could reach and exploit from the internet.
Learn moreInternal Network Penetration Testing
Assess your internal environment from the perspective of an attacker who has gained initial access. We evaluate Active Directory security, lateral movement paths, privilege escalation, and access to sensitive systems.
Learn moreWi-Fi Security Assessment
Test your wireless infrastructure for encryption weaknesses, rogue access points, guest network isolation failures, and captive portal vulnerabilities across corporate and guest networks.
Learn moreVulnerability Assessment
Authenticated scanning with manual validation to identify known vulnerabilities, missing patches, and misconfigurations across your internal and external network. A practical starting point before a full penetration test.
Learn moreWho Needs This
Who needs infrastructure security testing?
Any organisation with network infrastructure that processes sensitive data, has systems accessible from the internet, or operates under compliance requirements benefits from regular infrastructure security testing.
Organisations with internet-facing systems
If you have services accessible from the internet, they are continuously probed by automated scanners and opportunistic attackers. External penetration testing identifies what can actually be exploited, not just what is exposed.
Businesses subject to ISO 27001, PCI DSS, or Cyber Essentials Plus
Multiple frameworks require evidence of independent penetration testing. We provide structured reporting and methodology documentation aligned to auditor and QSA requirements.
Teams with hybrid or distributed environments
Cloud infrastructure, VPNs, and remote access services extend the attack surface beyond the traditional perimeter. Infrastructure testing should account for how these components interact with your on-premise environment.
Organisations that have not tested recently
Configuration drift, new deployments, and newly disclosed vulnerabilities mean that even well-managed environments can develop security gaps between tests. Annual testing provides a current and accurate baseline.
Common Questions
Network and infrastructure security testing - frequently asked questions
Infrastructure security testing covers the network devices, servers, perimeter services, and systems that make up your IT environment.
This includes external-facing assets such as firewalls, VPNs, remote access services, and cloud infrastructure, as well as internal systems including servers, workstations, Active Directory, and internal services.
The scope is agreed before testing begins and is tailored entirely to your environment.
External infrastructure testing assesses what an attacker outside your network could reach and exploit, covering internet-facing services, perimeter devices, and cloud assets.
Internal infrastructure testing assesses what an attacker could do once inside your network, whether through a phishing compromise, an insider threat, or initial access that was gained externally. It covers Active Directory, lateral movement paths, privilege escalation, and access to sensitive systems.
Both are complementary and are frequently scoped as a combined engagement.
Pricing depends on the scope and type of testing. External network penetration testing starts from £1,800, internal network testing from £2,850, and Wi-Fi assessments from £1,700. Combined engagements are typically better value than booking separately. See our penetration testing pricing guide for worked examples, or request a quote for a fixed-price proposal based on your specific environment.
Several major frameworks require or recommend regular infrastructure testing:
- PCI DSS mandates annual external and internal penetration testing, plus additional testing after significant changes.
- ISO 27001 requires technical vulnerability testing as evidence of ongoing security control assurance, but doesn't explicitly require penetration testing.
We provide methodology notes and structured reporting that supports QSA and auditor evidence requirements.
You can request an infrastructure security testing quote using our quote form. Include the type of testing required, a rough indication of your environment size (IP ranges for external or internal testing, number of access points and locations for Wi-Fi), any compliance requirements, and your preferred timeframe.
We respond with a fixed-price written proposal within one business day.
Yes. Cloud-hosted infrastructure on AWS, Azure, GCP, and other platforms that forms part of your external attack surface is included in external network testing scope. For cloud configuration reviews beyond perimeter testing, request a quote for configuration review services .
Get a fixed price for your infrastructure testing
Tell us about your environment and we'll respond with a fixed-price proposal within one business day. No obligation.