Intrusion Detection Systems (IDS) and Intrusion Prevention Systems (IPS) are vital security devices designed to detect and alert security teams of any attacks on the network. In the event of an attacker making it into the network, IDS and IPS can detect and try to stop them. This article will explore the differences between IDS and IPS.
IDS come in two types: Host-based and Network-based. Host-based IDS (HIDs) focuses on intrusion detection for a specific computer. In contrast, Network-based IDS (NIDs) actively watches the network and detects and sends alerts if there is an attack. IDS is designed to be placed behind the firewall on the inside of the network, where it can detect any abnormalities in the traffic passing through the network.
The basics of IDS is that it detects and sends alerts. IDS goes through a network normalization process where it learns the normal functions of the network. When it detects a difference in the network, IDS sends an alert. IDS can detect Trojans, malware, and any other types of intruders. IDS signatures always need to be updated to ensure it stays ahead of any threats.
IPS is an added layer of security before any internet traffic can get into the network. IPS is placed in line behind the firewall between the firewall and the corporate network. IPS can detect, alert, and defend the network. IPS catches any attacks that make it through the firewall and denies the connection, actively defending the network.
While both IDS and IPS work from inside the network behind the firewall, there are significant differences between them. IDS detects attackers and network alarms and sends alerts via email or text. IPS actively defends the network and stops attacks. IDS sends alerts while IPS detects, alerts, and defends the network.
In conclusion, IDS and IPS are crucial security devices that complement firewalls, content filtering, and anti-malware. IDS detects and sends alerts, while IPS actively defends the network. Understanding the differences between IDS and IPS is essential to ensure the network is secure.