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🛑 '''Intrusion prevention system (IPS)''' is a network security technology that not only detects malicious activity — as an [[Definition:Intrusion detection system (IDS) | intrusion detection system]] does — but also takes automated action to block or neutralize threats in real time before they can compromise systems or exfiltrate data. In the insurance industry, where [[Definition:Insurance carrier | carriers]] and [[Definition:Managing general agent (MGA) | MGAs]] process high volumes of sensitive transactions across interconnected platforms — [[Definition:Policy administration system (PAS) | policy administration]], [[Definition:Claims management system | claims]], [[Definition:Billing | billing]], and [[Definition:Reinsurance | reinsurance]] systems — an IPS provides an active defense layer that can stop an attack mid-stream rather than simply sounding an alarm after the fact. This real-time intervention capability makes IPS a critical component of the defense-in-depth security strategies that regulators and [[Definition:Cyber insurance | cyber]] underwriters increasingly expect.

⚙️ An IPS typically sits inline within the network path — meaning all traffic passes through it — and inspects packets against a combination of signature databases, anomaly detection algorithms, and protocol analysis rules. When it identifies traffic matching a known exploit signature or exhibiting behavior consistent with an attack (such as a SQL injection attempt targeting a web-based [[Definition:Underwriting | underwriting]] portal, or a brute-force login attack against a [[Definition:Broker | broker]] trading platform), the IPS can drop the malicious packets, reset the connection, or quarantine the offending traffic, all without human intervention. In practice, insurance organizations deploy IPS at network perimeters, within internal network segments separating sensitive zones (such as databases holding [[Definition:Personally identifiable information (PII) | PII]] from general user networks), and increasingly within [[Definition:Cloud computing | cloud]] environments where virtual IPS appliances or cloud-native security services inspect traffic between workloads.

🔐 The distinction between IDS and IPS carries practical weight in both insurance operations and cyber risk evaluation. An IDS that detects but does not prevent an intrusion may still allow a threat actor to reach policyholder records or disrupt [[Definition:Claims | claims]] operations before a human analyst can respond — a gap that can be measured in minutes but result in millions in [[Definition:Loss | losses]] and regulatory penalties. For this reason, [[Definition:Cyber insurance | cyber insurance]] underwriters frequently probe whether an applicant relies solely on detection-based tools or has deployed active prevention capabilities, and the answer can materially influence [[Definition:Premium | pricing]] and coverage terms. Regulatory expectations reinforce this: frameworks such as the EU's Digital Operational Resilience Act (DORA) and the NAIC Insurance Data Security Model Law call for security controls proportionate to the risk, and for organizations holding the volume and sensitivity of data typical of insurers, an IPS is generally considered proportionate. As [[Definition:Insurtech | insurtech]] ecosystems grow more interconnected through [[Definition:Application programming interface (API) | APIs]] and partner integrations, the attack surface expands correspondingly, making automated, inline threat prevention an indispensable element of the modern insurance technology security posture.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Intrusion detection system (IDS)]]
* [[Definition:Cyber insurance]]
* [[Definition:Information security]]
* [[Definition:Operational resilience]]
* [[Definition:Cloud computing]]
* [[Definition:Data privacy]]
{{Div col end}}

Definition:Intrusion prevention system (IPS) - Revision history

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