In today’s digital age, network security is more critical than ever. One of the most effective tools for enhancing network security is a Security Information and Event Management (SIEM) system. In a recent webinar, Lauren VonLintel, a sales engineer at Nex-Tech, discussed the importance of SIEM systems and how they provide visibility across your network. This article will summarize the main points of the presentation and explain why SIEM systems are essential for modern network security.

Understanding Data Breaches 
According to the 2025 CISO report, it takes about 200 days to detect a breach and another 70 days to remediate it. This lengthy process underscores the need for effective security measures. The longer a breach goes undetected, the more damage it can cause. Therefore, having a system in place that can quickly identify and respond to threats is crucial.

The Role of SIEM 
SIEM systems collect and analyze log data from various network components, such as PCs, servers, and cloud services. These logs contain valuable information about user activities and system events. By centralizing and analyzing this data, SIEM systems can detect anomalies and potential security threats. This real-time analysis allows organizations to respond to threats more quickly and effectively.

The concept of using log data for security is not new. However, the ability to analyze this data in real-time has only become feasible in recent years, due to advancements in technology. Centralizing log data helps in identifying what is normal on a network, making it easier to spot unusual activities. This historical context highlights the evolution of network security and the increasing importance of SIEM systems.

Human Intervention and Compliance 
While SIEM systems can detect anomalies, human intervention is crucial for remediation. Security Operations Centers (SOCs) play a vital role in monitoring and responding to threats. Additionally, certain industries, such as the financial and medical sectors, are required to retain logs for compliance purposes. This combination of technology and human expertise ensures that organizations can effectively manage and respond to security threats.

For instance, the deletion of a virtual machine from a server farm or the clearing of Windows event logs are activities that could indicate a security breach.  Another example is the “impossible travel” alert in Microsoft 365, which flags logins from geographically distant locations within a short time frame. These examples illustrate the practical applications of SIEM systems and their ability to identify potential threats. However, follow-up by a human will determine if it is an actual threat or legitimate activity.

Insurance and SIEM 
Cybersecurity insurance often requires organizations to have SIEM systems in place. Insurance questionnaires may ask about centralized log collection and management, as well as the duration of log storage. Having a SIEM system can impact an organization’s ability to obtain coverage, and the terms of that coverage. This requirement underscores the importance of SIEM systems in maintaining network security and ensuring business continuity.

Conclusion 
In conclusion, SIEM systems are essential for modern network security. They provide valuable insights into network activities, help detect and respond to threats, and ensure compliance with industry regulations. As cyber threats continue to evolve, the role of SIEM systems will become increasingly important in safeguarding sensitive data and maintaining business continuity.