Internal Network Penetration Testing

Learn how malicious actors could exploit the vulnerabilities in your online infrastructure to access your internal systems and networks. Our external network penetration testing service will help you discover and fix any security issues that could put your confidential data at risk and allow hackers to maintain persistent access to your network.

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Our scalable SaaS solution reforms traditional internal network penetration testing, harnessing the power of both automated scanning and integrated expert penetration testing to provide business-critical security insights and efficient attack surface management in a single platform.

Continuous Penetration Testing Service


View your internal network penetration testing results instantly from day one instead of waiting weeks for your report

Informer Platform Cloud Services Alert


Add additional team members and set up alerts and integrate Informer into your remediation workflow with integrations

External Network Penetration Testing


One-click retesting allows you to validate identified vulnerabilities that you have fixed for added assurance

Our Approach to Internal Network Penetration Testing

Internal networks can be large and complicated, with many devices and systems connected to each other. Our flexible approach tries to locate the hosts and the vulnerabilities that exist in your network, from outdated software to improper settings.

We simulate scenarios to test your internal network and see how an attacker could exploit these vulnerabilities to achieve their goals. These goals could be accessing financial data, stealing intellectual property, or compromising your network security.

We use a combination of automated and manual techniques to find and exploit vulnerabilities in your network. We also use our expertise and creativity to overcome any challenges or obstacles that we encounter during the testing process.

How we security test internal network infrastructure

We use a combination of manual and automated penetration testing techniques to identify vulnerabilities thoroughly and efficiently using commercial and open-source tools.

Our effective approach includes:

  • Attempting default user accounts and passwords
  • Assessing networking equipment
  • Find passwords that can be reused across the network
  • Exploiting default settings and configurations
  • Identifying operating system and application vulnerabilities on servers
  • Testing the configuration of the Active Directory environment
  • Escalating privileges within the environment to increase access

Several testing stages are followed that result in an effective test. By using our platform’s cyber intelligence capability together with expert penetration testing knowledge, Informer’s testers identify your true attack surface with depth.

  • Asset discovery – asset mapping is using Informer’s discovery tools and intelligence engine
  • Service identification – identifies live services that are accessible from the internet
  • Vulnerability analysis – each service is analyzed in detail to identify misconfigurations and software vulnerabilities
  • Service exploitation – exploitation will be performed to verify vulnerabilities and gain access to infrastructure
  • Gain additional access & pivoting – successful exploitation will be used to gain further access to connected networks and hosts.

Instant access to your pen test results

Our web internal network infrastructure service uses our SaaS platform to give you a quick and interactive security testing experience. You can fix vulnerabilities as soon as our testers discover them without waiting for the test to end. Use our Jira integration to create tickets automatically for your developers to resolve issues.

Each test comes with a summary that gives you a simple overview of the results. For each vulnerability discovered, you can access:

  • Detailed descriptions of the vulnerability finding with CVSS scores
  • Evidence detailing the location and parameters affected
  • Screenshots uploaded by our penetration testers
  • Remedial action and recommendations
  • References to more information if you need to dig deeper

Each test is stored separately in our platform so you can access detailed findings fast or export them in a PDF report. You can download reports in a number of formats at any time during or after the test.

Technical support and debrief sessions

Our internal infrastructure penetration testing service does not end with delivering reports. Our commitment extends to offering comprehensive debrief sessions with our expert penetration testing team. During these sessions, you’ll have the opportunity to discuss findings, ask questions, and seek advice. Whether you’re part of the security, IT, or development teams, we’re here to empower you with actionable insights.

We're CREST Penetration Testing Accredited

Informer is a CREST Penetration Testing accredited company. We invest in our team to ensure our pen testing methodologies, knowledge, skills, and experience are at the forefront of internal network penetration testing.

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Identifies patching inconsistencies

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Host misconfigurations

Finds directly exploitable misconfigurations

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Network segregation

Assesses separation of networks

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Attack chain

See how vulnerabilities are combined to breach your network

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Active Directory

Learn how AD configurations can be exploited

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Lateral movement

Understand how attackers can move across your network

Frequently asked questions

If you have any further questions, get in touch with our friendly team.

How safe is my network while you're testing?

Inevitably, there’s always a level of risk to any security test, but we are meticulous about the tests that we run.

Do you need to attend our office?

You have the choice – we can either do onsite testing or test remotely, which is popular – saving on travel expenses and time.

How does this type of testing satisfy ISO27001 requirements?

In order to meet the ISO27001, you are required to run both an internal penetration test and an external penetration test. Add vulnerability scanning to provide evidence of ongoing security monitoring.

Can you work out of hours?

We can work out of hours for an additional charge. If part of your infrastructure is in a time zone that is in our normal working business hours, you won’t be charged.

Do you offer a retest?

We offer a retest if you were to use our remote internal penetration testing offering.

What is Internal Network Penetration Testing?

An internal network penetration test simulates an attack on your organisation’s internal network using a form of authorised access or starting point within your internal network. The Internal Network Pen Test simulates how an attacker could gain access to your network and analyses and documents the extent of your vulnerabilities.

What is Internal Network Security?

Network security is a set of practices and technologies to keep your network protected from attacks or data breaches. It includes access control, cyberattack prevention and malware detection amongst other measures.