network penetration testing

Published: 05 Jan 2023

Network Penetration Testing – An Informative Guide

Last Updated: 15 Feb 2024

What is Network Penetration Testing?

Network Penetration Testing

Penetration testing, or pen testing, involves simulating cyberattacks against the systems to help identify any vulnerabilities that could be potentially exploited. Network penetration tests use various hacking techniques to identify security vulnerabilities in applications or networks. These tests use real methods and approaches that a hacker could use to access the system, providing critical information about the security of a network.

The penetration testing process, in general, is the practice of attempting to breach a computer system or network to discover security flaws.Testers use various methods to gain access to systems, including exploiting vulnerabilities, social engineering and brute force attacks

This network penetration testing guide will provide you with step-by-step procedures to effectively conduct penetration tests, assess the security of your network infrastructure, and implement robust countermeasures to mitigate potential threats.

Why Should Digital Businesses Consider Network Penetration Testing?

business consider network penetration testing

Protects sensitive data

There is no denying the fact that digital businesses must guard themselves against data breaches. Penetration testing often functions like ethical hacks and simulates cyber-attacks as best as possible. A minor glitch can leak sensitive data, affecting customers’ trust, affecting brand value, and also violating industry regulations. Here, a helpful way to determine the level of intrusion is to identify levels of risk that the application is exposed to.

Ensures overall security

Be it the business model, sensitive data, or newly released apps, network pen testing for network ensures that no overlooked flaw compromises the business integrity. Security assessments and website security scans should be a part of any initiative that involves sensitive data. Some examples of such flaws include SQL injections, misconfigured firewalls, outdated software, virus and malware.

Meets compliance requirements

Certain security regulations insist on continuous automated network penetration testing, irrespective of the industry. For example, data security for the payment transactions ensures that such tests help clients protect customers’ sensitive information (PCI DSS).

Continued maintenance

Network pen tests require multiple continuous runs to ensure long-term security. Penetration testers look over the security controls used for the business network, such as firewalls, layered security, encryption processes, etc.

Benefits offered by network penetration testing services to digital businesses:

Specifically, the following are ways pen testing helps understand and improve overall security

Understanding network benchmarks

Testing security controls

Evaluating security posture

Identifying security flaws

Assessing risk

Addressing and fixing identified network security flaws

Preventing network and data breaches

Ensuring network and system security

Steps Involved in Network Penetration Testing

steps for network penetration testing

In simplest terms, network pen testing simulates a real-life attack, providing critical information about potential weaknesses hackers could use as entry points to gain access to the network. Ethical hackers use a variety of methods and network penetration testing steps in attempt to compromise the network.

A typical network pen testing or penetration testing approach involves the following steps:


In the planning phase, ethical hackers discuss the scope and overall aim of the test with critical stakeholders. Testing methods and success metrics are defined in this initial discussion phase. After an introductory overview is decided upon, certified ethical hackers survey all components of the businesses’ network.

 Network Discovery & Vulnerability Scanning

In this phase, the penetration tester performs TCP and UDP port scanning to identify live hosts on the target network, open ports and services running on the ports. After that, testers perform vulnerability scanning on the discovered hosts and open ports to detect vulnerabilities.

Network Penetration Testing

After testing the network to understand its behaviour, perform automated scanning validation to manually verify the results from scanning in previous phase. Then, penetration testing is performed where testers try to exploit the network and applications hosted in the network by leveraging misconfigurations and software vulnerabilities such as buffer overflows, injection, brute force attacks, etc.

Analysis and Reporting

After completing testing activities, pen testers will analyse their results and create a report showing their findings. This report will provide actionable insight into vulnerabilities, actual exploitability and the chance for businesses to take necessary remediation action before a real hacker can exploit vulnerabilities in their system.

Types of Network Penetration Testing

types of network penetration testing

A few different types of testing can impact the structure and deliverables of the network penetration testing methodology described above. Specifically, there are two main categories of network penetration testing:

External penetration testing

External penetration testing evaluates the vulnerabilities to analyse the possibility of being attacked by a remote intruder and exploiting the vulnerabilities and information being exposed to outsiders. As a result, the test shows whether the cybersecurity measures implemented by an organisation suffice to secure sensitive data and assesses its potential to safeguard against external attacks.

External penetration tests include:

Configuration testing

Deployment management testing

Identity management testing

Authentication testing

Authorization testing

Session management testing

Business Logic Testing

Client-Side Testing

Testing for error handling

Internal penetration testing

An internal pen test uses a different way of dealing with the attacks and comes into the picture after an external penetration test is completed. Internal penetration testing aims at identifying what could be accomplished by an intruder who may break into the network and gain unauthorised access. Internal network penetration testing methodology reveals that should an attacker gain access equivalent to an insider, or if any malicious internal user tries to break the security, what impact could it have on the disclosure, misuse, alteration, or damage to the confidential information.

Internal penetration tests include:

Internal network scanning

Port scanning

System fingerprinting

Firewall testing

Password strength testing

Third-party security

configuration testing

Best Network Penetration Testing Tools in 2024

network penetration testing tools


Key Features

Helps map a network by scanning ports, discovering operating systems and creating device inventory

Easy to navigate

Easy Wide range of networking features


Key Features

Used by security professionals to detect systematic vulnerabilities

Contains portions of fuzzing, anti-forensic and evasion network pen testing tools

Currently includes nearly 1677 exploits


Key Features

Capture and analyse network traffic

Inspect and decrypt protocols

Capture live data from Ethernet, LAN, USB, etc.

Export output to XML, PostScript, CSV, or plain text


Key Features

Allows efficient vulnerability assessment

Accurate identification of vulnerabilities

Integrates with the rest of the product portfolio


Key Features

Available for Windows, Linux and Mac

Detects a variety of vulnerabilities within web applications

Easy to navigate UI

Supports many pen-testing activities

Indusface WAS

Key Features

Pause and resume feature

Enables manual penetration testing

Checks for malware infection, the reputation of the links on the website and defacement and broken links

Unlimited POC requests to provide evidence of identified vulnerabilities and remove false positives


Key Features

3000+ tests scanning for CVEs in OWASP top 10, SANS 25

Testing for ISO 27001, HIPAA, SOC2, GDPR

Integration with GitLab, GitHub, Slack and Jira

Zero false positives ensured by manual pen-testers

Scans progressive web apps and single-page apps

Scan behind logged-in pages

Intensive remediation support


Network penetration testing, or pen testing, is a crucial practice for digital businesses in the United Kingdom to ensure their cybersecurity. It is an effective way to view the application or network security from a hacker’s perspective. Once the security has reached a particular stage, pen testing is essential to a business’s security plan. Network penetration testing services provides visibility, confidence and increased security to the network. It improves the network’s security, identifies attack vectors and tests incident response procedures. Network pen testing requires specialised knowledge and skills in network security testing tools, so it’s essential to understand the requirements and have professional penetration testing experts perform effective testing to meet the desired security outcomes.

How can TestingXperts Help with Network Penetration Testing?

How testingxperts help with network penetration testing

TestingXperts (Tx) is one of the five largest global pure-play software testing services providers. Tx, one of the top pen testing companies in the UK, has been chosen as a trusted QA partner by Fortune clients and ensures superior testing outcomes for its global clientele. We have rich expertise in enabling end-to-end security testing services for global clients across various industry domains like healthcare, telecom, BFSI, retail & eCommerce, etc.

With our domain knowledge and with over a decade of pure play experience in automated network security penetration testing, the company has been serving the UK clientele with high-quality next-gen software testing services to deliver superior enterprise network security testing solutions to clients.

TestingXperts Differentiators:

Large pool of CEHs (Certified Ethical Hackers) for specialized penetration testing.

Conformance with international standards, including OWASP and OSSTMM.

Vendor independence coupled with deep expertise in key security technologies.

The report classifies each vulnerability into appropriate categories along with mitigation strategies.

Ensuring zero false positives with snapshots of exploitation.

Complete coverage of regression testing and penetration testing best practices.

Vulnerability-free application with an iterative penetration testing strategy for further release

Supported Tools: Hp Web Inspect, IBM App Scan, Acunetix, Cenzic Hailstorm, Burp Suite Pro and other open-source tools.

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