NetAlertX Device Detection

CybersecurityBeginnerCost~$0Time1–2 hoursResearched

Cost and time are estimates, not measured results.Leads to 1 follow-on build

Build manual

BLUEPRINT MANUAL

Unknown Device Detection with NetAlertX

Use NetAlertX on your existing Docker homelab to build a known-device baseline for one local LAN and visibly flag a MAC address the first time it appears.

NetAlertX runs with host networking on the Mini-PC and ARP-scans local devices inside the same /24 broadcast domain. A separate VLAN or routed subnet is shown beyond a Layer-3 boundary with no ARP discovery edge to it. — ARP discovery is local by design; routed reachability does not make another segment part of the same ARP scan.

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