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Home / Glossary / NIDS

Glossary · Security

NIDS

Network-based Intrusion Detection System

In plain language

A system on the network that watches traffic passing by and alerts on anything suspicious.

The metaphor

Like a camera in the lobby that records everyone entering and sends an alert when a stranger appears.

Going deeper

How it works

It compares traffic against known attack patterns and unusual behaviour.
It alerts and leaves the response to a person.
It sees the whole network's traffic and misses what is encrypted end to end.
Many firewalls include a version.

How WILDCARD handles it

Network covers the managed UniFi gateway, which has intrusion detection built in.

In practice

A report lists blocked and flagged events from the firewall.
An alert shows repeated login attempts against a server.
An auditor asks whether network monitoring is on.

A question owners ask

Do I need a separate box for it?

No. Small offices get it inside the firewall.

Where WILDCARD handles this

Network

Firewall managed and monitored
Switches kept current
On-prem Active Directory auth

Start with Network

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