By: Vanna karthik; Vel Tech University, Chennai, India
Abstract
Security of networks has become critical in today’s evolving cybersecurity environment because it protects against unauthorized entry along with destructive activities. The security analysis by IDS enables organizations to detect and handle potential dangers. The article presents a basic understanding of IDS along with its classification system and operational framework and its fundamental role in safeguarding network infrastructure. The comprehension of IDS functions helps readers recognize why this system remains vital for cybersecurity threat identification along with threat mitigation thus improving network security postures.
Introduction
Organizations depend on digital systems more than ever before which creates an increasing risk of cyber-attacks in their environments. Organizations rely on Intrusion Detection Systems (IDS) for network security because these tools track and respond to unauthorized network activities which can threaten system operations[1]. The core distinction between IDS and firewalls exists in their different roles because while firewalls function to stop unauthorized attempts IDS exists to detect abnormal user conduct. This document examines fundamental IDS concepts while explaining different types along with their security operations for maintaining network security systems.
Intrusion Detection Systems serve as security tools to track network data combined with system operations to locate harmful activities that break security protocols. IDS systems create warning alerts after detecting unusual activities which allow network administrators to take necessary steps for response. IDS exists in hardware version as well as software form or can function as a combined system[2]. The technical system maintains its main function by detecting security threats during active operations to enable preventative measures before damage occurs.
Types of Intrusion Detection Systems[3]
Network-Based IDS (NIDS) : NIDS monitors network traffic for anomalous activity. Typically, it is placed at strategic points within the network, such as the boundary or in between many network segments. NIDS examines data packets for anomalies, already established attack patterns, or policy violations.
Host-Based IDS (HIDS) : HIDS monitors user activity, file integrity, and system logs when it is installed on hardware, like workstations or servers. It is quite effective at identifying insider threats and illegal changes to system files.
Signature-Based IDS : This kind of IDS uses a database of known attack signatures to identify threats. When network traffic starts to look like a signature, an alarm is triggered. Although signature-based IDS are good at identifying known threats, they may have trouble identifying unknown or novel assaults.
Anomaly-Based IDS : Anomaly-based systems use machine learning and statistical analysis to provide a baseline of typical network behavior. Any departure from the usual is thought to be malevolent. This technique can result in false positives, even if it is appropriate for detecting new malware and zero-day assaults.
Hybrid IDS : Hybrid intrusion detection systems, which integrate anomaly-based and signature-based detection techniques, provide a more reliable security solution. By utilizing the advantages of both strategies, it lowers false positives and improves detection accuracy.
How IDS Operates[4]
There are several steps involved in IDS operation, including:
- Data Collection: For analysis, IDS collects system logs or network traffic.
- Preprocessing: To eliminate noise, the gathered data is filtered and normalized.
- Detection Mechanism: IDS detects possible threats by using signature-based or anomaly-based approaches.
- Alert Generation: IDS sends administrators alerts if it finds questionable activity.
- Response and Mitigation: To reduce identified threats, security professionals take the required steps.
The Importance of IDS in Network Security[5]
IDS plays a critical role in network security for several reasons:
1. Early Threat Detection :Organizations can act swiftly and reduce damage because of IDS’s real-time monitoring and threat detection capabilities.
2. Compliance Adherence :Most industries mandate the implementation of IDS to comply with safety laws and regulations like GDPR, HIPAA, and PCI-DSS.
3. Improved Visibility :IDS helps administrators uncover vulnerabilities and enhance overall security with insightful information about system activity and network traffic.
4. Response to the Incident :IDS enables efficient incident response and forensic investigation by generating alerts and giving comprehensive details of identified risks.
5. Protection from Advanced Threats :A second layer of defense can be added by using advanced IDS systems, i.e., anomaly-based and hybrid IDS, which possess the ability to identify advanced and unknown threats.
Conclusion
Systems for detecting intrusions (IDS) are essential parts of a thorough network security plan. They offer vital skills for identifying and countering possible attacks, improving an organization’s overall security posture. IDS plays a crucial role in detecting and reducing cyberthreats, despite its drawbacks. A vital first step in creating a safe and robust network environment is for novices to grasp the fundamentals of intrusion detection systems. IDS is still a vital component of our network security strategy, which must change along with cyberthreats.
References
- D. P. F. Möller, “Intrusion Detection and Prevention,” in Guide to Cybersecurity in Digital Transformation: Trends, Methods, Technologies, Applications and Best Practices, D. P. F. Möller, Ed., Cham: Springer Nature Switzerland, 2023, pp. 131–179. doi: 10.1007/978-3-031-26845-8_3.
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Cite As
Karthik V. (2025) The Role of Intrusion Detection System(IDS) in Network Security, Insights2techinfo pp.1