Network and Infrastructure Penetration Testing Services
Expose the attack paths running through your network infrastructure before adversaries reach critical assets. Misconfigured firewalls, unpatched services, and weak Active Directory configurations remain undetected until Cyphere’s CREST-certified network penetration testing and infrastructure assessments validate and prioritise every exploitable vulnerability.
Cyphere includes unlimited retests, remediation planning, and technical debriefs in every engagement. No add-ons, no extra invoices. Security teams receive defined risk reduction and direct support until vulnerabilities are resolved.
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Our Complete Network and Infrastructure Penetration Testing Services
A simulated attack exercise aimed at finding weaknesses in a company’s infrastructure for cyber security testing. This exercise is aimed at internal (corporate, production environments) and/or external (internet-facing) networks.
Network testing shouldn’t feel like guesswork. We scope fast and remove guesswork from scoping to reports (walkthroughs, diagrams, short videos you provide, or structured forms), then test safely and explain outcomes in plain English. Our approach is built for mid-market IT and security leaders who need:
- evidence that holds up to audits and client questionnaires, and
- a clear remediation plan that your engineers can implement to move the needle on risk reduction.
Our Complete Network and Infrastructure Penetration Testing Services
We’re not a “single test type” provider. We deliver a complete network and infrastructure penetration testing service that covers perimeter exposure, internal movement, identity-driven compromise paths, device hardening and segmentation. Below are the core services that typically sit under network penetration testing engagements.
Internal Penetration Testing
Internal network testing simulates what happens after an initial foothold (for example, a compromised laptop, VPN access, or a contractor account). We assess segmentation, privilege boundaries, identity controls and lateral movement paths.
Build Configuration & Hardening Reviews
These baseline checks against secure configuration expectations such as CIS benchmarks, secure best practices from Microsoft, AWS, specific product vendors for servers, security and network devices.
External Penetration Testing
External network testing focuses on internet-facing systems: gateways, VPNs, exposed management interfaces, remote access services and perimeter devices. We validate what is reachable, what is exploitable, and what can be used to pivot.
Active Directory Security Assessment
Active Directory security is one of the strong pillars against data breaches. We look for privilege escalation paths, Kerberos related weaknesses, and identity driven lateral movement.
Network Device Hardening Reviews
Network device hardening reviews include thorough configuration and rules reviews on routers, switches, VPN concentrators and management plane exposure.
Wireless Penetration Testing
This is aimed at your guest and corporate wireless networks looking for issues related to encryption and authentication, guest isolation, rogue AP risk, detection, misconfigurations and Wi‑Fi paths into internal networks.
Firewall Security Assessment
Our firewall security assessment service is aimed at checks around configuration issues, reviewing firewall rule sets and ACLs actually enforce intended boundaries.
Methodology Behind Our Network Penetration Testing Services
We start with fast scoping so there are no surprises later. We confirm what’s in scope, what “impact” means for your business, and what safe testing looks like for your environment.
We then perform reconnaissance and service discovery to understand what’s exposed and how systems interact across networks, VLANs and identity boundaries.
Next, we validate vulnerabilities using a mix of tooling and manual checks, removing false positives and focusing on what is realistically exploitable.
Where appropriate, we perform controlled exploitation to prove impact safely and measure what an attacker could achieve (without destabilising production).
Finally, we deliver an engineer-ready report and run debrief calls with stakeholders. We support remediation planning with your team and once issues are addressed, then a retest is schedueld – free for up to 12 months – so you can prove closure.
Common Security Vulnerabilities We Find in Your Network and Infrastructure
Secure weaknesses in hardening across networking, security, telecommunications & other internal equipment, OS and endpoint vulnerabilities.
Network segregation checks with attempts to subvert restrictions in place.
Our internal network penetration test methodology involves password cracking and statistical analysis to show how passwords affect the general health of the security of the domain. It is an important element of the penetration testing assessments whether it is a grey box or white box security testing.
Network equipment such as switch, routers, peripherals such as printers, imaging and scanning devices, are checked against security vulnerabilities and secure hardening weaknesses.
Why Choose Cyphere for Network and Infrastructure Penetration Testing Services in the UK?
CREST accredited Network Penetration Testing
You get recognised assurance and consistent testing standards.
Unlimited Retests upto 12 months
We verify fixes and help you achieve a significantly improved security posture. (High and critical items are prioritised first.)
We identify lesser-known but high-impact weaknesses
Not just headline CVEs; also misconfigurations and control gaps that drive real compromise.
No ‘report and run’ Approach
We combine technical depth with practical business focus, ensuring value add through risk remediation planning, unlimited support and retests.
Senior Consultants with Expertise
We bring real-world experience across networks, identity and device security.
Safe exploitation with minimal disruption
Controlled testing with agreed windows, escalation paths and safeguards.
Ongoing remediation guidance
You can get answers when your engineers are implementing fixes, not weeks later.
Holistic support across people, process and technology
We help you improve security controls, policies and training where it materially reduces risk.
What people are saying about us?
Excellent people to work with.
"Very good knowledge of requirement and give us correct findings with excellent remedy to improve our security for our B2B portal site."
Harman was great, really knowledgeable
"Harman was great, really knowledgeable, helpful and on hand to answer any questions. The final report was very clear providing all the technical information."
My experience of the team was 5 star.
"They were so helpful, and their technical delivery and client communication were excellent."
Extremely satisfied
"Extremely satisfied with their approach, speed and end results that I got for my company. Big Thanks."
Experienced Team
"Great experienced team, very knowledgable and helpful, willing to adjust the product to suit the customer. Would recommend."
Professional Work
"A totally professional engagement from start to finish with the highest quality advice and guidance."
High Quality Testing Service
"The service provided by Cyphere is second to none. High quality testing services. Very reliable and professional approach."
Assured Service
"Cyphere provide a personal and assured service, focusing on both pre and post analysis in supporting us to change and embed a security cultured approach."
Recommended Service
"Highly recommend Cyphere for pen testing. The recommendations in the report were comprehensive and communicated so that technical and non-technical members of the team could follow them."
Recommended Pen Testing Service
"Cyphere were great in both carrying out our penetration testing and taking us through the results and remediation steps. We would gladly use them for future projects.
Highly Recommended
"We had penetration tests service for PCI DSS compliance program from the Cyphere! Very professional, efficient communication, great findings that improved our system security posture! Highly recommended!
Exceeded Expectations
"Harman and the team at Cyphere truly are experts in their field and provide an outstanding service! Always going above and beyond to exceed customer expectations.
Skilled Team
I’ve worked with Cyphere on a number of penetration tests in addition to some cyber essentials support and certification! I’ve found them to be highly skilled and professional.
Skilled Team
I’ve worked with Cyphere on a number of penetration tests in addition to some cyber essentials support and certification! I’ve found them to be highly skilled and professional.
Perceptive Reporting
Cyphere undertook pen testing for us recently. The process was very smooth, and the team were flexible in working around our constraints. The report was clear, actionable and perceptive.
Outstanding Cybersecurity Partner
Cyphere has been outstanding partner to our agency. I've tried many in the past but they have been extremely meticulous in getting our systems secured.
Helpful Services
Cyphere has been an excellent partner and helped us achieve our goals with a great level of expertise, communication and helpfulness making the whole process easy to understand and complete.
High Standards
Harman and his team were excellent throughout, they understood and completed the tasks (external penetration test) within tight deadlines to a high standard.
Communicative & Responsive Team
I had an amazing experience working with Cyphere! Their communication was top-notch, making the entire process smooth and efficient. I found their team to be incredibly responsive and attentive to my needs.
Efficient Service
Worked with team at Cyphere for a cyber security assessment, gap analysis etc. The team has delivered a very professional, efficient service at all stages of the process to date.
Benefits of Our Network and Infrastructure Pentesting Services
we focus on what can actually be used in your environment
Just like 80/20 principle, close the small set of issues that drives most risk
Mmap evidence to PCI DSS, ISO 27001, Cyber Essentials Plus, UK GDPR or specific compliance requirements
Remove unnecessary exposure and tighten segmentation
Validate that controls hold under realistic conditions
Stakeholders understand impact, urgency and next steps. We help you build your business case
Network Penetration Testing for All Industries
We validate perimeter exposure, internal movement paths, and evidence quality to support strict audit expectations and high-value identity security.
We assess segmentation and remote access controls using safe methods that respect high-availability requirements and regulatory expectations.
We reduce risk to sensitive data by focusing on isolation, access control, and operational resilience across complex clinical environments.
We secure payment-related pathways and third-party integrations by identifying reachable services and reducing unnecessary attack surface.
We help protect privileged client data by validating remote access controls, segmentation, and secure administration pathways.
We test mixed device estates and shared networks to identify legacy exposures and segmentation gaps without disrupting teaching or research.
We prioritise practical 80/20 remediation so stretched teams can reduce risk quickly without adding operational burden.
We validate controls across multi-site networks and legacy systems, recommending changes that are safe to implement through change control.
We validate segmentation and exposed services to reduce partner-access and distribution-workflow risks.
We reduce exposure across mixed infrastructure and public-facing services by improving hardening and access boundaries.
Frequently Asked Questions
Network and infrastructure penetration testing is a controlled security assessment of internal and/or internet-facing networks, systems and devices. We identify vulnerabilities, validate exploitability where safe, and provide a remediation plan with evidence your engineers can act on.
Cost depends on scope: number of IPs/sites, internal vs external coverage, identity testing, and whether you need compliance mapping. Most engagements are priced as fixed-fee mid-market projects; we scope quickly and transparently so you avoid surprises.
You should expect clear scoping, safe testing, a prioritised report with business impact, and a remediation plan. With Cyphere, you also get stakeholder debriefs and free retests for up to 12 months to verify fixes.
Look for CREST accreditation, senior-led delivery, clear scoping, evidence-based reporting, and remediation support. The best providers help you reduce risk in practice—not just produce findings.
Yes. We can test external exposure, internal network movement, segmentation and identity-driven compromise paths, depending on your objectives and rules of engagement.
Yes, most network testing can be delivered remotely with the right access and approvals. Where onsite work is required (for example, restricted environments), we’ll confirm that during scoping.
A secure network provides secure environment
Our Network Pentest Engagement Approach
