Network Security

Identify Network Vulnerabilities Before Attackers Exploit Them

Your network is the foundation of your organization's IT infrastructure. It connects employees, applications, cloud environments, databases, servers, remote offices, and business-critical systems. A single weakness in your network can provide attackers with an entry point to compromise sensitive information, disrupt operations, or move laterally across your environment.

As cyber threats continue to evolve, attackers increasingly target exposed network services, weak authentication mechanisms, misconfigured firewalls, insecure VPNs, outdated operating systems, and poorly segmented internal networks. Once access is gained, attackers often escalate privileges, compromise Active Directory, and access critical business assets.

NuageSec's Network Penetration Testing Services simulate real-world attack scenarios to evaluate the effectiveness of your network security controls. Our assessments identify exploitable vulnerabilities across internal and external networks, validate security configurations, and provide practical recommendations to reduce cyber risk.

Securing Networks For
Internal Networks
External Infrastructure
Active Directory
VPN Access
Firewalls Audit
Wireless Wi-Fi
Routers & Switches
Domain Controllers
PTES Standard
NIST Guidelines
Internal Networks
External Infrastructure
Active Directory
VPN Access
Firewalls Audit
Wireless Wi-Fi
Routers & Switches
Domain Controllers
PTES Standard
NIST Guidelines

What is Network Penetration Testing?

Network Penetration Testing is an authorized security assessment that evaluates the security of network infrastructure by identifying and safely exploiting vulnerabilities under controlled conditions.

Unlike automated vulnerability scanning, Network Penetration Testing validates whether weaknesses can actually be exploited to gain unauthorized access, escalate privileges, compromise sensitive systems, or disrupt business operations.

Why Network Penetration Testing Matters

Modern enterprise networks are increasingly complex, combining on-premises infrastructure, cloud services, remote work environments, and third-party integrations. This complexity creates new attack surfaces that require continuous security validation.

Identify Exposed Services

Detect internet-facing systems, open ports, insecure protocols, and unnecessary services that increase the attack surface.

Validate Network Segmentation

Ensure critical business systems remain isolated and protected from unauthorized lateral movement.

Strengthen Identity Security

Assess Active Directory configurations, privileged accounts, administrative access parameters, and credential strength.

Reduce Lateral Movement Risk

Determine whether an attacker could pivot from a compromised user workstation to critical database and AD servers.

Improve Security Monitoring

Validate the real-world performance of your IDPS, logging mechanisms, alert routing pipelines, and SIEM thresholds.

Support Regulatory Compliance

Satisfy regular infrastructure penetration testing requirements to remain compliant with industry auditors.

Common Network Security Risks We Identify

Enterprise networks contain multiple attack surfaces that require regular testing. Our Network Penetration Testing identifies vulnerabilities including:

Exposed Network Services

  • Unnecessary open ports (RDP, FTP, Telnet)
  • Insecure public protocols (deprecated SMB / HTTP)
  • Exposed management interfaces
  • Insecure DNS and email configurations

Weak Firewall Configurations

  • Overly broad access control rules
  • Inadequate inbound / outbound traffic filtering
  • Permissive routing tables configuration
  • Insecure NAT settings rules

VPN Security Weaknesses

  • Missing Multi-Factor Authentication
  • Weak cryptographic cipher selections
  • Permissive split tunneling configurations
  • Insecure remote access credentials management

Active Directory Security Flaws

  • Weak password policies and service account settings
  • Insecure Kerberos configurations (Kerberoasting, AS-REP)
  • Overly permissive Group Policy Objects (GPOs)
  • Exposed credentials in AD attributes / file shares

Internal Network Weaknesses

  • Lack of VLAN segment controls
  • Unrestricted administrator privilege elevation paths
  • Insecure SMB file sharing permissions
  • Excessive cross-domain trust relationships

Wireless & Server Flaws

  • Weak Wi-Fi encryption (WPA2/WPA3 configuration issues)
  • Rogue access points on corporate corridors
  • Missing OS security patches
  • Default administrative configuration parameters

Network Penetration Testing vs Network Vulnerability Scanning

Organizations achieve the strongest security posture by combining continuous scanning with periodic Network Penetration Testing.

FeatureNetwork Vulnerability ScanningNetwork Penetration Testing
Primary ObjectiveIdentifies known vulnerabilitiesValidates exploitability through controlled testing
Validation DepthPrimarily automatedManual testing supported by automation
Vulnerability ScopeFocuses on individual systemsEvaluates complete attack paths
Context IntegrationLimited business contextMeasures real-world business impact
Best ForBest for continuous monitoringBest for comprehensive network security validation

Types of Network Penetration Testing

NuageSec performs network penetration testing across enterprise environments, corporate offices, data centers, hybrid infrastructure, and cloud-connected networks.

Internal Network Testing

Simulating an Attacker Inside Your Organization

Internal testing assumes an attacker has already gained access to your network through phishing, stolen credentials, malware, or an insider threat.

Best Suited For
  • Corporate LANs
  • Data Centers
  • Hybrid Office environments
Key Coverage Areas
  • Active Directory Privilege Escalation testing
  • Lateral Movement & pivots analysis
  • Internal server and domain controllers audits
  • Network Segmentation & VLAN isolation checks

External Network Testing

Assessing Internet-Facing Infrastructure

External testing simulates attacks originating from outside your organization to evaluate publicly accessible perimeter systems.

Best Suited For
  • Perimeter Networks
  • Public IP Blocks
  • VPN Gateways
Key Coverage Areas
  • Perimeter Firewall rule auditing
  • VPN & Remote Access validation
  • DNS & SMTP configurations review
  • Publicly exposed services mapping

Active Directory Assessment

Protecting Enterprise Identity Infrastructure

Active Directory is the primary target during enterprise attacks. We identify privilege escalation paths and weak settings.

Best Suited For
  • Windows Domain Networks
  • Identity Access hubs
  • Hybrid AD environments
Key Coverage Areas
  • Kerberoasting & AS-REP Roasting defense checks
  • Group Policies & GPO permission checks
  • Privileged account delegation audits
  • Credential dumping & Ticket forgery assessments

Active Directory, Firewalls & Deep Testing Areas

We perform rigorous audits into identity systems, remote connections, segment firewalls, and internal lateral movement targets.

Active Directory & Identity

Identity infrastructure controls the keys to the kingdom. We test configurations thoroughly.

Domain Controllers HardeningKerberos Delegation SecurityGroup Policy Object (GPO) AuditingPass-the-Hash & Ticket attacksCredential Dumping checksPassword Policy EnforcementPrivileged AD Groups (Admin)Service Account PrivilegesDomain Trust Audits

Remote Access & Firewall Security

Perimeter borders and remote connections must resist sophisticated perimeter probing.

VPN MFA & Authentication controlsSplit Tunneling VerificationFirewall Access Control Lists (ACL)NAT Configurations reviewAdministrative Portal ExposureSecure cipher selectionsIngress & Egress filteringRogue interface mapping

Network Segmentation & Lateral Pivots

Proper segmentation prevents localized breaches from turning into full network takeovers.

VLAN Boundary IsolationInternal firewall rules checkWorkstation-to-Workstation traffic blockSensitive database zone accessDevelopment vs Production boundaryCloud Connectivity securityPivoting capabilities validationLateral Admin tools testing

Wireless & Infrastructure Devices

All router, switch, and wireless access point configurations are reviewed for baseline protection.

Wi-Fi Encryption (WPA2/WPA3)Rogue Access Points detectionGuest network segregation checksSignal Leakage analysisSwitch Port Access ControlsDefault configuration checkDevice firmware patch levelSecure device administration

Our Network Penetration Testing Methodology

NuageSec follows a structured methodology aligned with internationally recognized infrastructure security standards to ensure complete safety and visibility.

1
1. Discovery & Scope Definition
Define objectives, identify target IP ranges, critical systems, rules of engagement, and testing windows.
2
2. Reconnaissance & Enumeration
Identify active hosts, open ports, network protocols, running services, and operating systems.
3
3. Vulnerability Analysis
Conduct systematic analysis to identify outdated operating systems, misconfigured services, and security patches missing.
4
4. Controlled Exploitation
Safely validate identified vulnerabilities to prove exploitability and measure the direct business risk.
5
5. Privilege Escalation & Lateral Movement
Attempt domain privilege escalation and lateral pivots to access restricted business servers and AD systems.
6
6. Post-Exploitation Analysis
Determine the potential damage of a compromise by assessing persistence capabilities and sensitive database access.
7
7. Reporting
Deliver executive summaries, detailed technical findings, proof of concepts, and structured remediation guides.
8
8. Re-Testing & Validation
Conduct follow-up checks to confirm that remediation steps have successfully resolved the identified issues.

Security Standards & Frameworks Aligned

Our Network Penetration Testing methodology aligns with globally recognized penetration testing and cybersecurity frameworks.

Penetration Testing Standards

Penetration Testing Execution Standard (PTES)OWASP Testing GuideNIST SP 800-115OSSTMM (Open Source Security Testing Methodology)CREST Penetration Testing Principles

Security Frameworks

CIS Controls FrameworkMITRE ATT&CK Enterprise MatrixCVSS Vulnerability RatingNIST Cybersecurity Framework (CSF)ISO 27001 Security ControlsMicrosoft Security BaselinesCIS Benchmarks for Network Devices

What You Receive with Our Network Penetration Testing

Every NuageSec Network Penetration Testing engagement includes detailed documentation designed for executives, IT infrastructure admins, and compliance stakeholders.

Executive Summary Report

A business-focused summary of findings and overall posture to assist senior management in prioritizing investments.

Includes:
  • Executive Overview
  • Scope of Assessment
  • Overall Security Rating
  • Critical Findings & Impact
  • Business Risk Summary
  • Compliance Readiness
  • Strategic Action Roadmap

Technical Penetration Testing Report

A detailed report outlining every finding, technical evidence, proof of exploit, and clear developer guides.

Includes:
  • Scope & Targeted Systems
  • Testing Methodology details
  • Vulnerability Details & Evidence
  • Controlled Exploitation Evidence
  • CVSS Severity Scores
  • Attack Path Maps
  • Step-by-Step Remediation Guides

Network Risk Prioritization Matrix

A categorized spreadsheet of findings designed to help your team address critical perimeter weaknesses first.

Includes:
  • CVSS Score
  • Risk Rating Metrics
  • Exploitability Likelihood
  • Business Impact Analysis
  • Affected Infrastructure Targets
  • Remediation Priority levels

Executive Security Dashboard

A visual dashboard mapping assets, critical exposures, external posture, and regulatory compliance.

Includes:
  • Total Systems Assessed
  • Critical & High Findings
  • External Perimeter Score
  • Internal Pivoting Threat Level
  • Active Directory Security status
  • Compliance Readiness summary

Secure Remediation Guidance

Actionable remediation steps aligned with enterprise security baselines and vendor recommendations.

Includes:
  • Firewall Rule Optimization
  • Active Directory Hardening
  • Least Privilege Configuration
  • Network Segmentation Rules
  • VPN & Remote Access Hardening
  • Monitoring & Logging Tuning

Re-Testing & Validation

Validation checks performed by NuageSec to confirm that patch implementations are verified.

Includes:
  • Remediation Validation tests
  • Fix Evidence & logs
  • Remaining Risk Assessments
  • Updated Risk matrix ratings
  • Final Assessment Sign-off

Industries We Serve

Enterprise networks support critical business operations across every industry. Our testing is custom-tailored to the operational boundaries of your sector.

SaaS & Technology

Protect corporate environments, developer platforms, CI/CD systems, and backend administrative services.

Banking & Financial Services

Secure transaction networks, internal banking infrastructure, SWIFT terminals, and customer account environments.

Healthcare

Protect hospital networks, electronic health record (EHR) systems, connected IoT devices, and application networks.

Manufacturing

Secure OT/IT environments, industrial control systems (ICS), production assembly, and ERP databases.

Retail & Ecommerce

Protect corporate systems, warehouse databases, point-of-sale (POS) terminal segments, and customer databases.

Logistics & Supply Chain

Secure inventory databases, shipment tracking servers, dispatch routers, and supply chain connectors.

Compliance Frameworks Supported

Independent network security assessments satisfy regulatory requirements and secure operational resilience frameworks.

SOC 2

Validate security, availability, and confidentiality trust principles.

ISO 27001

Align with international information security management standards.

PCI DSS

Protect cardholder data and payment infrastructure.

HIPAA

Secure patient portals and protected health information (PHI).

GDPR

Ensure compliance with European data privacy and security regulations.

DORA

Enhance digital operational resilience for financial entities.

NIS2

Meet cybersecurity requirements for essential European services.

CMMC

Validate controls required for defense industrial base contractors.

ISO 42001

Establish secure and trustworthy AI application governance.

Why Choose NuageSec for Network Penetration Testing?

Selecting the right penetration testing partner is essential for identifying real-world attack paths and improving enterprise security.

Experienced Network Security Specialists

Our consultants specialize in enterprise networking, Active Directory security, infrastructure security, ethical hacking, and hybrid systems.

Manual & Automated Testing

We combine enterprise-grade security tools with expert manual penetration testing to discover privilege escalation paths and pivots scanners overlook.

Real-World Attack Simulation

Our assessments simulate modern threat actor techniques to validate how well your AD and perimeter boundaries can resist targeted attacks.

Business-Focused Reporting

Every finding includes detailed evidence, business impact metrics, and prioritized remediation recommendations to align IT and security goals.

Standards-Based Methodology

Our Network Penetration Testing methodology follows PTES, NIST SP 800-115, OSSTMM, CIS Controls, MITRE ATT&CK, and ISO 27001 security standards.

End-to-End Security Partnership

From initial planning and scoping down to custom remediation support sessions and re-testing validation, we partner with you to strengthen resilience.

Our Engagement Process

We follow a structured approach to ensure consistency, transparency, and measurable security improvements.

Step 1

Initial Consultation

Understand business objectives, network architecture, key targets, and regulatory requirements.

Step 2

Scope Definition

Define target IP ranges, Active Directory scopes, remote infrastructure boundaries, and guidelines.

Step 3

Project Kickoff

Coordinate schedules, communication pathways, technical contact points, and target systems boundaries.

Step 4

Network Penetration Testing

Execute passive enumeration, active scanning, script execution, manual vulnerability validation, and lateral pivot audits.

Step 5

Report Delivery

Deliver comprehensive executive and technical reports detailing risk maps, evidence, and remediation steps.

Step 6

Remediation Support

Provide technical feedback, consultations, and patch configurations assistance to your systems teams.

Step 7

Re-Testing

Verify implemented security upgrades and provide confirmation that identified weaknesses have been resolved.

Frequently Asked Questions

Network Penetration Testing is a controlled security assessment that simulates real-world cyberattacks to identify exploitable vulnerabilities across internal and external network infrastructure before malicious actors can exploit them.

External testing evaluates internet-facing systems such as firewalls, VPNs, web servers, and email infrastructure. Internal testing assumes an attacker has already gained network access and evaluates privilege escalation, lateral movement, Active Directory security, and access to critical systems.

Yes. We perform comprehensive Active Directory security assessments covering domain controllers, administrative accounts, Group Policies, Kerberos security, service accounts, delegation, password policies, and privilege escalation risks.

No. Testing is conducted using agreed rules of engagement and controlled exploitation techniques to minimize operational impact while accurately validating security controls.

Yes. Our assessments include firewall rule reviews, VPN security testing, wireless network security assessments, network segmentation validation, and secure configuration reviews.

Yes. Regular penetration testing supports compliance initiatives for ISO 27001, SOC 2, PCI DSS, HIPAA, GDPR, DORA, NIS2, CMMC, and other security frameworks that require ongoing validation of technical controls.

Most organizations should perform Network Penetration Testing at least annually or after significant infrastructure changes, cloud migrations, mergers, major application deployments, or regulatory requirements.

NuageSec combines experienced penetration testers, globally recognized methodologies, detailed reporting, remediation support, and practical security expertise to help organizations strengthen enterprise network security and reduce cyber risk.

Strengthen Your Enterprise Network Security

Your network is the backbone of your business operations. A single compromised system can provide attackers with access to sensitive data, critical applications, and essential infrastructure.

NuageSec's Network Penetration Testing Services help organizations identify exploitable attack paths, validate security controls, strengthen infrastructure resilience, and reduce enterprise cyber risk through comprehensive assessments aligned with international security standards.

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