NDR (Network Detection and Response) is a security technology that continuously monitors network traffic to detect, investigate, and respond to threats that evade perimeter defenses. Unlike traditional signature-based tools, NDR relies on behavioral analytics and machine learning to identify malicious activity inside the network, including:
By analyzing network metadata and full packet capture, NDR provides the visibility needed to detect threats that have already bypassed other security layers — such as firewalls and endpoint protection.
Modern organizations are exposed to sophisticated threats that enter the network and remain undetected for extended periods — often weeks or months. NDR is the answer to this challenge and is indispensable for all organizations with a networked environment, and is especially critical for:
Deploying NDR brings tangible, measurable benefits to the security posture of any organization:
Firewalls, intrusion detection systems (IDS), and endpoint protection tools are complementary to NDR — they are not replacements. Perimeter tools cannot see what happens inside the network after a breach, and endpoint solutions are limited to managed and visible devices.
As noted in our XDR showcase: “XDR, NDR and SIEM technologies form the security pillar of any organization.” NDR specifically fills the network visibility gap that no other technology addresses — making it a non-negotiable component of a mature security architecture.
Additionally, with the growing adoption of NIS2 regulations, NDR provides a documented, auditable network monitoring capability that demonstrates compliance with continuous monitoring requirements.
This is a real-world example that illustrates the value of NDR in an active enterprise environment.
During a routine monitoring cycle, one of our NDR deployments flagged a sequence of anomalous internal communications. A workstation was initiating connections to a large number of internal servers over a short period, using ports and protocols typical of legitimate administrative tools. On the surface, each individual connection looked routine — valid credentials, known tools, normal business hours.
However, the NDR engine’s behavioral model identified the pattern as consistent with automated lateral movement — a hallmark of ransomware pre-deployment activity. The workstation had been compromised through a phishing email hours earlier, and the attacker was now enumerating the internal network in preparation for a coordinated attack.
Because the NDR system generated an alert within minutes of the lateral movement beginning, our analysts were able to isolate the affected workstation and terminate the attack chain before any data was encrypted or exfiltrated. A traditional perimeter or endpoint solution would not have correlated these network-level behaviors in real time — and the organization would have faced a significantly more severe outcome.
At Avola, we use the following NDR solutions in our daily business:
These are leading NDR solutions, and each of them will provide quality protection for your organization. ExtraHop Reveal(x) excels in environments where deep packet inspection and real-time threat detection are the priority, while Trend Micro DDI offers seamless integration for organizations already leveraging the Vision One platform.
In the selection we will propose to an individual user, we primarily look at the best possible integration with already existing solutions in their security system — both products are part of our broader portfolio, and our engineers work with them daily.
https://www.extrahop.com/products/security/what-is-ndr
https://www.extrahop.com/modern-ndr
https://www.trendmicro.com/en_us/business/products/network/advanced-threat-protection/inspector.html
Of course, you can also contact us for additional questions — at Avola we have top specialists for NDR, who will be happy to share their knowledge.