IPS and IDS systems can be implemented as standalone solutions on the network but are often integrated into a Next-Generation Firewall (NGFW). These systems use signatures, algorithms, and heuristics to detect network or host attacks. When installed on a host, it is known as a Host Intrusion Detection System (HIDS).
In this course, IDS and IPS are used interchangeably, as their differences often stem from configuration; an IPS is designed to detect and block threats, while an IDS only detects them. IPS systems can identify and block attackers, usually depending on regular updates and the capability to inspect encrypted traffic.
| Note: A key advantage of IDS and IPS is their frequent updates of new threat signatures from vendors. This provides defenders with confidence that emerging threats will be blocked as the firewall receives these updates. |