What is an Intrusion Prevention System (IPS)?

Imagine a virtual security guard standing at the entrance of your network. When data tries to pass through, the IPS inspects it for signs of malicious behavior. If something doesn’t check out, the system instantly blocks or redirects it, keeping your network safe from harm.

An IPS uses two primary techniques to detect threats:

• Signature-based Detection looks for patterns matching known attack methods.

• Anomaly-based Detection monitors traffic behaviors, flagging anything out of the ordinary as a potential threat.

Combined, these approaches allow the IPS to catch a wide range of attacks—from viruses to complex exploit attempts.

Types of intrusion prevention systems

IPS solutions are generally categorized based on the environments they protect:

• Network-based IPS (NIPS): Guards the broader network by monitoring its traffic.

• Host-based IPS (HIPS): Protects individual devices like servers or workstations.

• Cloud-based IPS: Focused on securing cloud environments and virtual infrastructures.

Each serves a unique role, and many organizations use a mix to cover all security needs.