Our long-term expertise helps clients address evolving cyber threats across infrastructure, cloud environments, and regulated industries.
Network Penetration Testing Service
Andersen’s network penetration testing services assess external and internal networks to identify exploitable vulnerabilities and validate security controls. We reveal realistic attack paths, helping reduce the attack surface, prioritize remediation, and improve network resilience.
Proven network security expertise
We apply experience from diverse security assessments to identify practical risks and provide recommendations aligned with each client’s technology and business priorities.
This team combines manual testing with automated tools to uncover vulnerabilities that standard vulnerability scanning may miss.
Network penetration testing services we provide
We assess how attackers could gain access, move through internal networks, or bypass security measures.
We assess external network security across internet-facing assets, cloud networks, hybrid networks, VPN, and remote access environments. The assessment shows how external attackers could identify entry points and gain access to protected systems.
Testing covers:
- Public-facing hosts, services, and cloud environments;
- VPN and remote access controls;
- Firewalls, gateways, and perimeter security measures.
We assess traditional corporate networks and Active Directory environments from an internal attacker’s perspective. The testing reveals how a compromised account or device could expose sensitive data or critical systems.
The assessment covers:
- Internal hosts, services, and trust relationships;
- Active Directory permissions and authentication paths;
- Weak credentials, misconfigurations, and privilege escalation routes.
We verify whether network zones properly isolate critical systems, sensitive data, and privileged services. Controlled attack attempts show whether segmentation gaps allow access between environments.
You receive:
- Validation of network boundaries and access rules;
- Evidence of unauthorized communication paths;
- Prioritized recommendations for mitigating segmentation risks.
We simulate how an attacker could move from an initially compromised system to higher-value resources. The assessment identifies excessive permissions, weak trust relationships, and paths to administrative access.
Our work reveals:
- Privilege escalation opportunities;
- Credential reuse and trust weaknesses;
- Routes toward critical systems and sensitive data.
We examine whether firewall rules and access controls enforce the intended security policy. Testing identifies overly permissive rules, exposed services, and control weaknesses that could enable unauthorized access.
The results include:
- Unnecessary or risky network exposure;
- Bypass opportunities in access control rules;
- Recommendations for a more secure perimeter.
We chain individual weaknesses into real-world attack scenarios and safely validate their potential impact. This shows where attackers could actually exploit vulnerabilities in sequence and which findings stay theoretical.
The analysis provides:
- Confirmed attack paths and entry points;
- Controlled proof of exploitability;
- Clear impact assessment for critical assets.
Identify the attack paths that matter most and close them before attackers use them
Our security certifications
Andersen holds ISO 27001 certification, and its security specialists apply recognized practices and controlled testing approaches to help clients reduce exploitable exposure and protect critical network resources.
Benefits of network penetration testing
Testing internal and external networks against real-world attacks shows where security measures fail and how far a breach could spread, so organizations invest in the fixes that reduce risk the most.
Reduce exposure to external attacks
Each entry point closed on the perimeter removes a route malicious actors could use to reach internal systems or sensitive data. External penetration testing confirms which internet-facing weaknesses are exploitable, so organizations fix those first.
Strengthen network security controls
Firewalls, access rules, and monitoring can pass a configuration review yet fail against a real attack. Testing shows which controls let unauthorized access through, so spending goes to fixing them rather than buying new tools.
Reduce risks from network segmentation gaps
Segmentation that holds under attack keeps an intrusion in one zone, away from critical systems. Companies using it to reduce PCI DSS scope must test it at least once every 12 months under Requirement 11.4.5.
Limit lateral movement after compromise
One stolen password should not open the whole network. Testing measures how far an intruder could get across internal networks, so organizations remove the privileges that turn one compromise into a domain-wide breach.
What you get from network penetration testing
Each engagement produces practical evidence that helps technical and business teams understand the risk, prioritize remediation, and confirm whether fixes work as intended.
Exploitable vulnerabilities
Findings describe confirmed security flaws, affected assets, technical evidence, and potential impact. This helps teams focus on weaknesses that create a genuine risk rather than theoretical issues identified only by scanning tools.
Validated attack paths
Attack path analysis shows how vulnerabilities can be combined to gain access, escalate privileges, or reach sensitive data. Teams can use this information to break the exploitation chain at its most important points.
Risk-prioritized findings
Findings are ranked according to exploitability, affected assets, business impact, and exposure. This gives stakeholders a clear order for addressing critical vulnerabilities and other potential security weaknesses effectively.
What our clients say
Client reviews describe how Andersen teams work alongside in-house staff, communicate on time, and stay on issues until they are resolved, the habits a network security assessment depends on.
Why choose Andersen for network penetration testing
Andersen combines certified expertise, tailored security assessments, and business-focused reporting to help clients make informed decisions about network risk.
Certified security expertise
Our specialists hold OSCP, GXPN, GWAPT, and CEH certifications and bring advanced techniques from hands-on offensive work. Their expertise supports a thorough assessment aligned with NIST SP 800-115, PTES, and the compliance expectations of regulated industries.
Testing tailored to your network environment
We adapt the scope, access model, techniques, and testing depth to your infrastructure, technology stack, and business priorities. This keeps the assessment focused on the attack vectors most relevant to your organization.
Actionable recommendations for risk reduction
Our detailed reports connect each finding with exploitability, potential impact, and practical remediation options. This enables security and engineering teams to address critical areas without spending resources on low-value changes.
End-to-end support from assessment to remediation
The specialists who tested your network stay involved during remediation, so questions go to people who know the evidence. Clients receive ongoing support until retesting confirms that implemented fixes hold.
Steps in our network penetration testing process
Andersen follows a practical process that moves from initial planning to verified remediation.
Start with a focused network security assessment and build a clearer path to risk reduction
Insights
Explore practical guidance on SD-WAN security, IT compliance standards, API testing, and cloud security. These insights help organizations understand changing cyber threats and strengthen their security measures.
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Why SD-WAN Security Matters?
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IT Compliance in the Digital Age
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API Testing: Advantages and Approaches
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Security in the Cloud
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FAQ
Penetration testing simulates real-world attacks to determine whether identified weaknesses can actually be exploited, while vulnerability scanning stops at finding vulnerabilities. A thorough assessment combines automated tools with manual testing and controlled exploitation to validate security controls, uncover vulnerabilities, and prioritize security flaws by actual exploitability and potential impact rather than CVSS scores alone.
Strengthen your network security
What happens next?
An expert contacts you after having analyzed your requirements;
If needed, we sign an NDA to ensure the highest privacy level;
We submit a comprehensive project proposal with estimates, timelines, CVs, etc.
Customers who trust us
