External Network Penetration Testing Services

The most effective way to keep cybercriminals from gaining unauthorised access to your network is to test for external threats.

CREST Accredited

our Certifications

In this digital age online presence is the face of your business. Hacking techniques are evolving and the data value is going up, creating a lucrative business for hackers. This is making every business vulnerable. Penetration Testing provides the assurance that your IT infrastructure and Applications are safe.

proven methodology of 3Columns

3Columns has vast experience with complex architecture designs gained through years of experience working with clients of all sizes, domains and structures. As we keep ourselves abreast  with threat activities on a daily basis, 3Columns is constantly learning about the latest attack techniques, exploits and security flaws.


3Columns will perform information gathering before any simulated attacks are actioned.

Vulnerability Detection

We will perform vulnerability detection to discover flaws in systems, networks and applications which can then be leveraged by the consultant.


We will try to actively exploit security weaknesses identified in the vulnerability detection phase. To achieve this 3Columns may use publicly available, in-house developed or commercially available exploit kits.

Privilege Escalation

After a target has been successfully compromised, we will try to gain a further foothold within the organization, this may involve gaining higher privileges in the system or potentially gaining access to other systems on the internal network. The end goal is to gain complete control of the network.

Data Exfilteration

Based on the scope of the project, 3Columns may be required to perform data extraction. To achieve this the consultant will use a set of tools and techniques in order to extract specific data from the organisation’s network.


The issues identified, will be properly documented with priority order , along with recommendations for every issue identified. These are presented in a clear and meaningful way for both a technical and a business audience.

A compromised IoT device can act as a Botnet

A compromised IoT device can provide hackers full access to your network or act as a jump host that hackers can use to launch an attack on other organisations.


A compromised device can not only be used to access your network or data, but also used by hackers to eavesdrop on conversation and movement by gaining unauthorised access to a microphone and camera

Network Sabotage

A compromised IoT device can provide unrestricted access to your network or can act as a jump host for hackers to launch an internal or external attack.

Loss of Data

A compromised IoT device can allow hackers to easily gain access to the network and private systems resulting in: Loss of network hijack, loss of data, and damage to brand reputation

External Penetration Testing FAQ

External Infrastructure Penetration Testing is a combination of manual and automated testing of a client's public-facing systems by simulating a malicious internet attacker. Servers with public IP addresses that can be accessed by internet users, such as websites and email servers, are examples of public facing systems.

3Columns has extensive experience in using external infrastructure testing methodologies to identify security flaws. Among these methodologies are:

Detecting firewall misconfigurations, 
identifying and exploiting vulnerabilities, 
locating and compromising administrative services and interfaces, and other attack techniques

The testing will identify potential attack vectors through which a system could be remotely compromised. 3Columns  will present the findings, including replication steps, as well as remediation recommendations.

External penetration testing services will typically focus on PTES (Penetration Testing Execution Standard) and OSSTMM (Open Source Security Testing Methodology Manual) for your organization's public-facing systems. In doing so, our expert penetration team aims to identify security flaws with your organization's external facing network that hold the potential to be exploited.

Just like you  check the locks of your door and your office alarm, it is crucial to regularly test your external cyber environment. By doing so, you can guarantee that cybercriminals will not gain unauthorised access to your external network and private data, as well as ensure that your organisation will not experience costly downtime and damaging reputational damage that is associated with a data breach.

The cost of an external penetration test will generally depend on the type of assessment  (whitebox, blackbox or greybox testing). As our experience, most companies looking to undertake an external penetration test can require between 8-10 days of testing and consulting services. There are other factors to consider that affect the price, including any regulatory or legal requirements affecting your industry.

How 3Columns can help you secure your business

3Columns’s CREST-accredited pen testing services are designed to identify and safely exploit security vulnerabilities in infrastructure, systems and applications. As with Internal & External Penetration Testing, all our assessments are designed to pinpoint hidden security risks and provide the support and guidance needed to address them.

Network Traffic

Identify Weaknesses

Home 3

Discover Misconfigurations

Sec Assure

Test Control Effectiveness

For more information on how our CREST-accredited penetration testing services can help safeguard your organisation, book your FREE assessment now.

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