IDS vs. IPS: An Introduction to Intrusion Detection Systems
27 April 2023
Intrusion detection systems are a fundamental tool in the cybersecurity of any organisation, as they detect and alert to potential security threats in the network. These systems work by monitoring and analysing network traffic and events on devices, and use predefined rules and patterns to identifying anomalous behaviour that may be indicative of a security threat. Therefore, we will try to delve deeper into the functionalities of IDS vs. IPS when intercepting potential cyber threats.
These systems monitor network traffic and events on devices to identify possible security threats, such as intrusions or malicious attacks. The purpose of the IDS is to detect and alert the security team to any suspicious activity that could compromise the integrity, confidentiality or availability of the information.
IDSs work by collecting and analysing data generated by devices and network traffic. They use a set of predefined rules and patterns to identify suspicious behaviour that may be indicative of a security threat.
In addition to detection, IDSs have three key functionalities: alert, registration y reply. Alerting involves immediate notification to the security team of any suspicious activity. Logging involves storing relevant information about security events for later analysis. And response refers to taking action to mitigate and remediate the security event. security threat detected in the network.
Some systems also employ machine learning techniques to detect such unusual activity patterns as discussed above. When suspicious activity is detected, the IDS generates an alert so that the security team can take the necessary measures to protect the network and information.
Intrusion prevention systems (IPS) are a complementary tool to intrusion detection systems (IDS) that can not only detect but also prevent malicious attacks on the network. IPSs analyse network traffic for suspicious patterns and - if they detect any malicious activity, act automatically to block or mitigate it.
In contrast to the differences between IDS vs. IPS, the former - as we have seen - focus on detection and alerting of security threats, while IPS have a more focused approach. more proactive approach and preventive. By having a defined security policy, IPSs can automatically block malicious traffic and reduce the risk of a security breach.
Both tools have in common their objective of detecting and preventing network security threatsIDS vs. IPS differ in their approach and functionalities.
In this list, we will present the main differences between an intrusion detection system (IDS) and an intrusion prevention system (IPS):
| Feature | IDS | IPS |
|---|---|---|
| Target | Detecting and alerting to potential threats network security | Detecting, alerting and preventing malicious network attacks |
| Key functionality | Detection | Detection, warning and prevention |
| Actions taken | Alerting the security team to suspicious activity | Automatically block or mitigate malicious traffic |
| Security policy | Based on detection and reporting | Based on detection, reporting and action |
| Approach | Reagent | Proactive |
| Impact on network traffic | Does not interfere with normal traffic | It can interfere with normal traffic by blocking malicious traffic. |
| Complexity | Less complex than an IPS | More complex than an IDS |
| Implementation | As a stand-alone solution or as part of a wider security system | As a stand-alone solution or as part of a wider security system |
It is always advisable to initially assess the needs and security objectives of the organisation before selecting a solution. Different types of intrusion detection systems include:
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