What is a Network-Based Intrusion Detection System (NIDS)?
A Network-Based Intrusion Detection System (NIDS) is a tool that monitors and analyzes network traffic to detect suspicious activities like unauthorized access, malware, or cyber-attacks. It is crucial for protecting networks from potential threats and ensuring the safety of data.
How Does NIDS Work?
NIDS monitors network traffic and detects unusual behavior that could indicate an attack. It can work in two ways:
- Passive Mode: NIDS monitors the network without interfering.
- Active Mode: NIDS can take action to block threats, but this can affect normal network traffic.
When NIDS detects a threat, it alerts the network administrators, providing details like the source of the attack, the time, and affected areas.
This method matches network traffic with known patterns of attacks.
Detects unusual traffic that doesn’t follow normal network behavior.
Combines both signature and anomaly-based methods for better accuracy.
Monitors HTTP, FTP, DNS, and more to identify suspicious activity.
Detects unauthorized access or configuration changes in routers, switches, and firewalls.
Tracks email servers, web servers, and databases for unusual activity.
Identifies vulnerabilities in operating systems that could lead to attacks.
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