Firewall Penetration Testing
Make sure your first line of defence holds
We probe your firewalls and review their configuration to expose weak rules and exploitable gaps before an attacker can use them.
Request a firewall test How it works
- CREST & CHECK accredited testers
- UK-based account team
- Live results platform
- No-obligation scoping call
Overview
Is your firewall doing what you think it is?
Firewalls sit at the heart of network security, yet a single overly permissive rule or outdated setting can quietly undo much of their value. Firewall penetration testing evaluates how effectively your devices keep unauthorised users out, and whether the rules in place really control the traffic they are meant to.
As part of our wider infrastructure testing, our consultants combine manual techniques with automated tooling and review the running configuration line by line. Findings are recorded in a central platform, scored using CVSS where appropriate, so your team can prioritise and remediate quickly.
The service is delivered in partnership with Rootshell Security, a CREST and CHECK accredited provider, and can be included in a 12-month testing package alongside other assessments.
What's included
What we assess
Our reviews cover configurations from all major firewall vendors and examine the settings attackers look for first.
Rule base and policy
We check that rules permit only legitimate traffic and identify overly broad or redundant entries.
Software version
Firmware and software versions are reviewed for known vulnerabilities and missing updates.
Authentication and passwords
Administrative access, password strength and authentication services are assessed for weaknesses.
Management and web services
Exposed administration interfaces and web services are examined for unnecessary risk.
VPN and cryptography
VPN configuration and cryptographic settings are tested to ensure remote access is properly protected.
Routing and device settings
We review routing protocols, time synchronisation, logon banners and vendor-specific options.
How it works
Getting started
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Share your requirements
Tell us about your firewall estate, vendors and objectives, and we will follow up to understand your needs.
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Agree scope
We confirm scope, objectives, testing environment, potential for disruption and which stakeholders need to be prepared.
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Test and review
Consultants carry out manual and automated testing and a detailed configuration review, typically remotely to minimise disruption.
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Report and remediate
Findings are published to the platform with risk scores and clear guidance, alongside any previous vulnerability data you import.
Benefits
Why test your firewalls
Catch misconfigurations early
Identify weak rules and policies that could allow unauthorised access before they are discovered by someone else.
Prepare your response
Simulating real-world attacks shows how your firewall handles different threats, helping you plan how to react.
One view of your risk
Firewall results sit alongside your other testing data, supporting quicker and better-informed decisions.
Support compliance
Demonstrate that your firewalls meet industry standards, building trust with clients, partners and stakeholders.
FAQ
Frequently asked questions
How does firewall penetration testing work?
We use a combination of tools and manual assessment to identify vulnerabilities and review the device configuration. The aim is to confirm that unauthorised access is blocked while legitimate traffic continues to flow.
Which firewall vendors do you cover?
We review configurations from all major firewall vendors. If you use a less common device, get in touch and we will confirm whether it can be supported.
How often should firewalls be tested?
At a minimum, test once a year and after any significant change to your network or firewall configuration. Our platform also lets you track remediation throughout the year.
What should we consider before testing?
Think about scope, objectives, the testing environment, any potential for disruption and which internal stakeholders need to be informed. We will guide you through each of these during planning.
Can firewall testing be combined with other services?
Yes. Firewall testing can sit within a 12-month package alongside web application, cloud, wireless, phishing and red team assessments, as well as vulnerability scanning and attack surface management.
Explore more
Related services
Find the gaps before attackers do
Get in touch to scope a firewall penetration test tailored to your network and compliance needs.
