Cybersecurity is an essential aspect of any business or organisation. As technology evolves, so do the threats that can harm an organisation’s operations, data and reputation. One of the most effective ways to defend against these threats is through the Defense in Depth (DiD) approach.

DiD is a cybersecurity approach in which multiple defensive methods are layered to protect a business. Since no individual security measure is guaranteed to endure every attack, combining several layers of security is more effective. This layering approach was first conceived by the National Security Agency (NSA) and is inspired by a military tactic with the same name. In the military, layers of defense help buy time. However, in IT, this approach is intended to prevent an incident altogether.

Essential elements of DiD

Implementing all the elements of an effective DiD strategy can help minimise the chances of threats seeping through the cracks. These elements include:

  1. Firewalls

A firewall is a security system comprised of hardware or software that can protect your network by filtering out unnecessary traffic and blocking unauthorised access to your data.

  1. Intrusion prevention and detection systems 

Intrusion prevention and detection systems scan the network to look for anything out of place. If a threatening activity is detected, it will alert the stakeholders and block attacks.

  1. Endpoint detection and response (EDR) 

Endpoint detection and response (EDR) solutions constantly monitor endpoints to find suspicious or malicious behavior in real time.

  1. Network segmentation 

Once you divide your business’s network into smaller units, you can monitor data traffic between segments and safeguard them from one another.

  1. The principle of least privilege (PoLP)

The principle of least privilege (PoLP) is a cybersecurity concept in which a user is only granted the minimum levels of access/permissions essential to perform their task.

  1. Strong passwords 

Poor password hygiene, including default passwords like “1234” or “admin,” can put your business at risk. Equally risky is the habit of using the same passwords for multiple accounts. To protect your accounts from being hacked, it’s essential to have strong passwords and an added layer of protection by using practices such as multifactor authentication (MFA).

  1. Patch management 

Security gaps left unattended due to poor patch management can make your business vulnerable to cyberattacks. When a new patch is delivered, deploy it immediately to prevent exploitation.

How IT service providers help defend against threats

Learning about these essential elements is important. Nortec’s CEO is presenting along with Shaunn Witherden from Kaseya in a 30-minute webinar.

An IT service provider will help you divide DiD into three security control areas:



Administrative controls

The policies and procedures of a business fall under administrative controls. These controls ensure

that appropriate guidance is available and security policies are followed.

Examples include hiring practices or employee onboarding protocols, data processing and

management procedures, information security policies, vendor risk management and third-party risk

management frameworks, information risk management strategies, and more.

  1. Technical controls

Hardware or software intended to protect systems and resources fall under technical controls. They include firewalls, configuration management, disk/data encryption, identity authentication (IAM), vulnerability scanners, patch management, virtual private networks (VPNs), intrusion detection systems (IDS), security awareness training and more.

 Physical controls

Anything that physically limits or prevents IT system access falls under physical controls, such as fences, keycards/badges, CCTV systems, locker rooms and more.

Don’t worry if you are struggling with developing a DiD strategy for your organisation. We’re here to make things as simple as possible. Call 1300 NORTEC to start the process of making your organisation more secure.

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Here at Nortec IT we understand the complexities surrounding technology. For more information or advice contact us on the form below or call (02) 9894 9514


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