Internal network penetration testing simulates attacks from inside the network, such as a compromised employee account or a malicious insider. This test focuses on:
Network Penetration Testing Services (Internal & External)
CyberFortify is a trusted cybersecurity company providing network penetration testing services. We help businesses secure their internal and external networks from cyber threats.
What Is Network Penetration Testing
Network penetration testing is a controlled security assessment designed to evaluate the strength of an organization’s network infrastructure by simulating real-world cyberattacks. The goal of a network security penetration test is to identify exploitable network vulnerabilities before malicious attackers gain unauthorized access.
During a penetration test network assessment, security experts analyze both internal and external networks to uncover weaknesses such as misconfigured firewalls, weak authentication, insecure network services, and poor network segmentation. These tests go beyond automated scans by validating whether vulnerabilities can actually be exploited in real attack scenarios.
Unlike basic vulnerability assessments, network penetration testing services focus on how attackers move through a network—testing access controls, privilege escalation paths, and lateral movement across systems. This provides organizations with a realistic view of their exposure to internal network penetration attempts and external threats targeting internet-facing systems.
Why Network Penetration Testing Is Important
Today’s networks are complex and constantly exposed to cyber threats. Without regular network penetration testing, hidden weaknesses in firewalls, network services, and access controls can be exploited by attackers.
A professional network security penetration test identifies real risks such as misconfigurations, weak segmentation, and insecure remote access. Both internal network penetration testing and external network penetration testing are essential to stop lateral movement, privilege escalation, and unauthorized access before serious damage occurs.
Regular network penetration testing services help organizations reduce risk, protect sensitive data, and ensure their network security controls actually work.
Types of Network Penetration Testing
Different organizations face different network risks. That’s why network penetration testing services are typically divided into two main types, based on the attack perspective.
Internal Network Penetration Testing
Lateral movement between systems
Privilege escalation
Weak network segmentation
Insecure internal services and access controls
It helps identify how far an attacker could go after initial access and exposes gaps in internal network security.
External Network Penetration Testing
External network penetration testing evaluates your organization’s exposure from the internet. It targets publicly accessible systems to identify risks such as:
Open ports and exposed services
Firewall and perimeter misconfigurations
Weak authentication mechanisms
Vulnerable remote access points
This type of network security penetration test shows how attackers could breach your network from outside.
Our Network Penetration Testing Processes
How Internal Network Penetration Testing Is Performed:
Internal network penetration testing simulates attacks from within the organization, such as a compromised employee account or malicious insider. The objective is to evaluate how far an attacker could move across the internal network after gaining initial access.
Our internal network penetration testing process includes:
Scope Definition and access setup
Defining internal network ranges, user roles, and access levels
Internal reconnaissance & enumeration
Mapping internal systems, endpoints, and network services
Privilege escalation testing
identifying excessive permissions and weak access controls
Lateral movement assessment
testing how an attacker can move between internal systems
Vulnerability validation
confirming exploitable weaknesses in internal network services
Internal risk reporting
clear findings with business impact and remediation guidance
This approach helps organizations uncover hidden risks, improve internal security controls, and prevent attackers from escalating access within the network.
How External Network Penetration Testing Is Performed
External network penetration testing simulates real-world attacks from outside your organization to identify vulnerabilities exposed to the internet. The goal is to understand how an external attacker could gain unauthorized access to your network.
Our network penetration testing methodology typically includes:
Scoping & asset identification
Identifying public-facing IPs, domains, firewalls, and network services
Reconnaissance & enumeration
Discovering open ports, running services, and exposed systems
Vulnerability analysis
Detecting misconfigurations, outdated software, and weak security controls
Exploitation & validation
Safely exploiting confirmed weaknesses to measure real risk
Risk-based reporting
Clear findings, severity ratings, and actionable remediation steps
This external network penetration testing approach helps organizations understand their real exposure and strengthen perimeter defenses before attackers do.
Our Network Penetration Testing Methodology
Our network pentesting methodology follows a structured, risk-based approach to identify vulnerabilities across your internal and external networks. This ensures your organization sees exactly how attackers could exploit weaknesses.
Scope Definition & Rules of Engagement
Identify network assets, IP ranges, and public-facing systems
Define rules to safely perform penetration tests without disrupting operations
Reconnaissance & Network Enumeration
Gather intelligence on network architecture
Map active devices, endpoints, and services
Identify potential attack paths
Active Scanning & Vulnerability Analysis
Manual and automated scanning of network devices
Detection of weak authentication, misconfigurations, and unpatched services
Prioritize risks based on potential impact
Exploitation & Post-Exploitation
Safely exploit confirmed vulnerabilities to validate risks
Test privilege escalation and lateral movement across internal systems
Assess real-world impact of internal and external threats
Reporting & Retesting
Provide network penetration test reports with severity ratings
Recommend actionable remediation for vulnerabilities
Retesting ensures fixes are effective
Network Assets We Test
Our network penetration testing services cover all critical components of your network infrastructure. By assessing these assets, we identify vulnerabilities before attackers can exploit them.
We test:
configuration issues, firmware vulnerabilities, and network segmentation gaps
misconfigurations, rule weaknesses, and exposed services
operating system weaknesses, unpatched software, and misconfigured services
vulnerabilities in connected devices that could be exploited internally
weak authentication, outdated protocols, and insecure services
insecure access points, misconfigured VPNs, and exposed remote management
Network Attacks & Techniques We Simulate
Our network penetration testing services simulate real-world attack techniques to evaluate the resilience of your network infrastructure. By replicating tactics used by malicious actors, we uncover vulnerabilities that standard scans often miss.
Layer 2 Attack
VLAN Hopping
bypassing network segmentation
ARP Spoofing & ARP Cache Poisoning
intercepting internal traffic
MAC Address Spoofing
impersonating devices
STP Manipulation
exploiting network topology weaknesses
Layer 3 & Network Attacks
DNS Spoofing & DNS Tunneling
redirecting or exfiltrating traffic
IP Spoofing & IP Redirection
impersonating trusted devices
Man-in-the-Middle (MitM)
intercepting communications
Session Hijacking & Replay
taking over active connections
Common Network Vulnerabilities We Identify
During our network penetration testing services, we focus on the most critical vulnerabilities that can compromise your internal and external networks:
Open Network Ports
unnecessary exposure to external attacks
Excessive User Privileges
potential for privilege escalation
Cryptographic Weaknesses
weak encryption or misconfigured SSL/TLS
Weak Authentication
poor password policies and credential risks
Legacy Protocols & Insecure Services
outdated systems that attackers target
Operating System Weaknesses
unpatched or misconfigured OS
Network Penetration Testing Deliverables
When you choose our network penetration testing service, you receive clear, actionable insights and structured reporting designed to strengthen your internal and external network security.
Comprehensive Security Report
Detailed findings with severity ratings, verified vulnerabilities, and validated attack paths to eliminate false positives.
Risk & Business Impact Analysis
Prioritized risks based on exploitability and potential business impact, helping you address the most critical threats first.
Remediation & Security Improvements
Actionable remediation guidance and strategic recommendations to strengthen security controls across all network assets.
Our Security Certifications & Methodologies
Our certified experts follow industry-standard methodologies to deliver reliable network penetration testing services. These certifications ensure that our testing is thorough, safe, and aligned with best practices.
Certifications We Hold:
CEH (Certified Ethical Hacker)
expertise in real-world attack simulations
CREST
globally recognized penetration testing standard
ISACA
IT audit and security governance expertise
Tiger Scheme
high-level penetration testing accreditation
Methodologies
Structured, risk-based network pentesting methodology
Controlled attack simulations to validate vulnerabilities safely
Actionable reporting with business impact and remediation
Why Organizations Trust Our Network Penetration Testing
We help organizations secure their internal and external networks through expert-led assessments, structured methodology, and business-focused reporting.
Experienced Experts & Proven Methodology
Our security specialists conduct internal and external network assessments using advanced penetration techniques and a structured methodology that simulates real-world attacks without disrupting operations.
Actionable & Business-Focused Results
We deliver clear findings with severity ratings, prioritized by business impact, along with step-by-step remediation guidance to help you make informed security decisions.
Compliance-Ready & Resilient Protection
Our approach aligns with industry standards and best practices, ensuring compliance while strengthening your network infrastructure against both internal and external threats.
Get Started With Network Penetration Testing
Secure your internal and external networks today. Our certified experts will identify network vulnerabilities and provide actionable steps to strengthen your network infrastructure.
Contact us now to schedule your network penetration test.
Network Penetration Testing FAQs
Network penetration testing is a controlled security assessment that identifies vulnerabilities in your internal and external networks by simulating real-world cyberattacks.
- Internal testing simulates attacks from inside your network (e.g., compromised employee accounts).
- External testing evaluates risks from outside the organization, targeting internet-facing systems and exposed services.
We recommend conducting network penetration testing services at least once a year, or after major network changes, to ensure all network vulnerabilities are identified and mitigated.
Yes. Many standards such as PCI DSS and industry best practices recommend regular network penetration tests to validate security controls and reduce risk.
You’ll receive a comprehensive report detailing vulnerabilities, risk prioritization, remediation steps, and business impact analysis, helping you strengthen your network infrastructure.