Trend Micro InterScan M Series, Administrator'S Manual

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Introducing Trend Micro Control Manager™
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present all installed product instances under one cluster group). However, from the
Control Manager server's perspective, each product instance that goes through the
formal registration process is regarded as an independent managed unit and each
managed unit is no different from another.
Through MCP, Control Manager supports cluster nodes.
Control Manager Agent Heartbeat
To monitor the status of InterScan Gateway Security Appliances, Control Manager
agents poll Control Manager based on a schedule. Polling occurs to indicate the status
of the InterScan Gateway Security Appliance and to check for commands to the
InterScan Gateway Security Appliance from Control Manager. The Control Manager
Web console then presents the product status. This means that the InterScan Gateway
Security Appliance status is not a real-time, moment-by-moment reflection of the
network’s status. Control Manager checks the status of each InterScan Gateway
Security Appliance in a sequential manner in the background. Control Manager
changes the status of InterScan Gateway Security Appliances to offline, when a fixed
period of time elapses without a heartbeat from the InterScan Gateway Security
Appliance.
Active heartbeats are not the only means Control Manager has for determining the
status of InterScan Gateway Security Appliances. The following also provide Control
Manager with the InterScan Gateway Security Appliance status:
• Control Manager receives logs from the InterScan Gateway Security Appliance.
Once Control Manager receives any type of log from the InterScan Gateway
Security Appliance successfully, this implies that the InterScan Gateway Security
Appliance is working fine.
• In two-way communication mode, Control Manager actively sends out a
notification message to trigger the InterScan Gateway Security Appliance to
retrieve the pending command. If server connects to the InterScan Gateway
Security Appliance successfully, it also indicates that the product is working fine
and this event will be counted as a heartbeat.
• In one-way communication mode, the Control Manager agent periodically sends
out query commands to Control Manager. This periodical query behavior works
like a heartbeat and is treated as such by Control Manager.
The Control Manager agent heartbeats implement with the following ways: