Network Security Testing
Network penetration testing simulates real-world attacks against your perimeter services, servers, network devices and internal systems. External testing assesses what is reachable from the internet. Internal testing assesses what an attacker or compromised insider could access once inside.
We agree the IP ranges, network segments, testing window and rules of engagement at scoping, and confirm a fixed price before testing starts. A certified consultant then runs the assessment by hand, using automated tooling only to support discovery, and your report separates what needs fixing now from what can be scheduled into normal remediation work.
Typical network attack surface
Why test your network?
Scope & coverage
Who Needs This
From £2,100
for network penetration testing
Not sure whether you need external, internal, or both? A 30-minute scoping call is free and gets you a fixed written quote.
No obligation · Strictly confidential · Reply within one business day
| External Network Testing 2-5 days | From £2,100 |
| Internal Network Testing 3-8 days | From £3,150 |
| Wi-Fi Security Testing 1 day on site per location | From £1,600 |
Compare all our penetration testing services.
Common Questions
It depends on the size of the environment and which parts are in scope. External network testing typically takes 2-5 days, internal network testing 3-8 days, and a Wi-Fi assessment 1-2 days.
Reports are delivered within 2 business days of testing completion. If you are preparing for your first assessment, our guide to scoping a network penetration test covers what information to have ready.
External network testing assesses what an attacker outside your network could reach and exploit, covering internet-facing services, perimeter devices, and cloud assets.
Internal network 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.
If you have never tested before and have systems exposed to the internet, external testing is the usual starting point because that is where opportunistic attacks begin.
Internal testing becomes the priority once your perimeter is in reasonable shape, or if your main concern is what a phishing compromise or a malicious insider could achieve. Most organisations testing annually cover both, and combined engagements are typically better value than booking them separately.
We will give you an honest recommendation during scoping rather than quoting for everything by default.
Pricing depends on the scope and type of testing. External network penetration testing starts from £2,100, internal network testing from £3,150, and Wi-Fi assessments from £1,600. Travel is charged in addition for on-site work.
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 network testing:
We provide methodology notes and structured reporting that supports QSA and auditor evidence requirements.
You can request a network penetration 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 reply within one business day to confirm your scope, usually with a short questionnaire or a call, then send a fixed-price written proposal.