intrångsdetektion

Intrångsdetektion, often referred to as Intrusion Detection System (IDS), is a security tool or method used to monitor network traffic and system activities for malicious activities or policy violations. The primary goal of an IDS is to detect unauthorized access, misuse, or damage to a computer system or network.

Intrusion detection systems can be broadly categorized into two main types: network-based intrusion detection systems (NIDS) and host-based intrusion detection systems (HIDS). NIDS monitor network traffic for suspicious patterns by analyzing data packets traversing the network. HIDS, on the other hand, monitor individual computer systems, examining system logs, file integrity, and running processes for signs of compromise.

There are also different detection methods employed by IDS. Signature-based detection identifies known threats by comparing observed activity against a database of predefined attack signatures. Anomaly-based detection establishes a baseline of normal system or network behavior and flags any deviation from this baseline as potentially malicious. Misuse-based detection is similar to signature-based but focuses on detecting specific patterns of actions that are known to be indicative of an attack.

When an IDS detects a potential intrusion, it typically generates an alert to inform security administrators. Some advanced systems, known as Intrusion Prevention Systems (IPS), can go a step further by automatically taking action to block or mitigate the detected threat, such as dropping malicious packets or terminating suspicious processes. IDS play a crucial role in modern cybersecurity by providing an essential layer of defense against a wide range of cyber threats.