Some elements on a network may not provide a clear up or down status when queried. For example, a message may get logged to the system's Event log by another application (such as an antivirus application alerting when a virus is found). Because these messages/events can occur at any time, a Passive Monitor Listener listens for them, and notifies WhatsUp Gold when they occur.
This dialog displays all Passive Monitors configured for this device.
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Double-click a Passive Monitor to edit the configuration.