About Passive Monitor Listeners

A Passive Monitor Listener is the component in passive monitors that listens for events to occur. When an event occurs, the listener notifies WhatsUp Gold and associated actions are fired.

WhatsUp Gold in installed with three Passive Monitor Listeners:

• SNMP Trap Listener. This listens for SNMP traps, or unsolicited SNMP messages, that are sent from a device to indicate a change in status.
• Syslog Trap Listener. This listens for Syslog messages forwarded from devices regarding a specific record and/or text within a record.
• Windows Event Log Listener. This listens for any WinEvent; for example a service start or stop, or logon failures.

Important: Before you can configure passive monitors, you must configure the coinciding Passive Monitor Listener(s) on the WhatsUp Gold console via Program Options. For more information, see Setting Program Options for Passive Monitor Listeners.