Perimeter Security's Ascent and Decline

For decades, the perimeter security model was used by businesses in terms of cyber safety. The concept was rather straightforward and consisted of defending the "inner area" against the "outer world." Firewalls, intruder prevention systems, and virtual private networks helped secure the network from unauthorized access. This strategy worked perfectly when users worked within the company premises and all IT infrastructure was concentrated in one place. Unfortunately, the world of digital technologies has evolved rapidly over time. Now there are cloud services, software solutions, and working-from-home policy which have led to blurring the boundary between the inner and outer networks.

Why the Perimeter Model No Longer Works

The attacker has developed along with the advancement of technology. No longer attacking the edge of the network, attackers can use human nature, stolen credentials, and endpoint devices. By using phishing attacks, ransomware, and supply chain weaknesses, attackers can evade any perimeter defense system and enter the system.

There is no way to trigger the alert in the security system during the navigation from one computer to another by the attacker. Since the perimeter solution cannot track the internal communication inside a network, there comes network visibility challenges and there is no chance of identifying where the attacker has entered inside the organization.

Network Detection and Response (NDR): The New Approach

A Network Detection and Response approach is a new method for cybersecurity. While perimeter solutions are mostly focused on preventing any attacks, the NDR approach acknowledges that attacks will take place and works on how to minimize the effect of those attacks.

An NDR solution analyzes the network traffic in real-time to detect anomalies. By concentrating on east-west network traffic, NDR identifies suspicious activities that cannot be detected using traditional perimeter solutions.

How NDR Enhances Threat Detection

One of the defining features of NDR is its use of advanced analytics and machine learning. Instead of relying on known threat signatures, it builds a baseline of normal network behavior and flags deviations. This way, organizations will be able to identify attacks that were previously unnoticed or advanced.

Another benefit of NDR technology is its contextual ability for the security team members. In other words, the alerts received will contain information about the threat, affected devices, and possible paths of the attacker's actions. The latter will speed up decision-making and minimize losses.

How NDR Fits into the Layered Security Approach

NDR technology cannot be used as a solution on its own. It is much more effective to use it in combination with other tools as part of the cybersecurity strategy. One can combine the use of NDR solutions with EDR technology, identity management technologies, and zero trust architecture.

As for the latter, the combination with NDR will prove very useful since the former approach is based on the lack of trust in the network and requires continuous authentication of users and devices, regardless of their location.

Embracing a New Approach to Cybersecurity

The end of perimeter cybersecurity represents a drastic change in the way that organizations conduct their cybersecurity practices. The old methods involved the use of only barriers, but now, the emphasis is placed on being able to bounce back from attacks, remain visible at all times, and react quickly.

Network detection and response represent a new mentality when it comes to cybersecurity. By enabling constant monitoring and offering meaningful information, network detection and response allow organizations to identify and deal with threats immediately. As attacks grow ever more sophisticated and persistent, there is no choice but to adapt.

While the perimeter may be dead, network detection and response make cybersecurity smarter and more adaptable than ever before.