Intrusion Detection / Prevention System explained
IDS and IPS are closely related defences that watch traffic and behaviour for the signatures and patterns of an attack. An IDS is a detective control: it identifies suspicious activity — port scans, known exploit attempts, unusual traffic — and alerts security teams to investigate. An IPS is a preventive control: positioned in line with traffic, it can automatically drop or block the malicious activity in real time.
Both rely on a mix of signature-based detection (matching known attack patterns) and anomaly-based detection (spotting deviations from normal behaviour). Today these capabilities are frequently built into a next-generation firewall and feed their findings into a broader monitoring platform, where analysts correlate them with other signals.
Why IDS/IPS matters for your business
Firewalls decide what's allowed in and out, but they don't deeply scrutinize the content of permitted traffic for attacks. IDS/IPS fills that gap, catching exploit attempts and malicious activity that ride along on otherwise allowed connections — including early signs of an intrusion in progress.
An IPS can stop an attack automatically the moment it's recognized, buying critical time. Paired with monitoring and skilled analysts, IDS/IPS turns raw alerts into early warning and active defence — a key part of detecting and containing threats before they spread.
Scalogic adds intrusion detection and prevention
Scalogic deploys intrusion detection and prevention as part of our network and cybersecurity services, typically integrated into managed next-generation firewalls. We tune the rules to your environment to block real threats while minimizing false alarms.
Crucially, the alerts don't just pile up — our 24/7 SOC investigates and responds to them, correlating IDS/IPS signals with endpoint and identity data through our SIEM. That's the difference between a noisy tool and real, actioned defence.
Frequently asked questions
What's the difference between IDS and IPS?
An IDS detects and alerts on suspicious activity. An IPS sits in line with traffic and can actively block it in real time. Many systems combine both functions.
Is IDS/IPS the same as a firewall?
No. A firewall controls which traffic is allowed; IDS/IPS inspects permitted traffic for attack patterns. They're complementary, and IPS is often built into next-generation firewalls.
Do the alerts need a human to act on them?
For real protection, yes. Scalogic's SOC investigates and responds to IDS/IPS alerts and correlates them with other data, turning detections into action.