Trend Micro InterScan Gateway Security Appliance M-Series ...

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Trend Micro InterScan Gateway Security Appliance M-Series Administrator’s Guide B-6 One-Way Communication NAT traversal has become an increasingly more significant issue in the current real-world network environment. In order to address this issue, MCP uses one-way communication. One-way communication has the Control Manager agent initiating the connection to and polling of commands from the server. Each request is a CGI-like command query or log transmission. In order to reduce the network impact, the connection is kept alive and open as much as possible. A subsequent request uses an existing open connection. Even if the connection is dropped, all connections involving SSL to the same host benefit from session ID cache that drastically reduces re-connection time. Two-Way Communication Two-way communication is an alternative to one-way communication. It is still based on one-way communication, but has an extra channel to receive server notifications. This extra channel is also based on HTTP protocol. Two-way communication can improve real time dispatching and processing of commands from the server by the Control Manager agent. The Control Manager agent side needs a Web server or CGI compatible program that can process CGI-like requests to receive notifications from Control Manager server. Single Sign-on (SSO) Support Through MCP, Control Manager 3.5 now supports single sign-on (SSO) functionality for Trend Micro products. This feature allows users to sign in to Control Manager and access the resources of other Trend Micro products without having to sign in to those products as well. The following products support SSO with Control Manager 3.5: • InterScan Gateway Security Appliance • SeverProtect for Linux version 2.5 • Network VirusWall Enforcer 1200 • Network VirusWall Enforcer 2500 Cluster Node Support Under varying cases, administrators may like to group certain product instances as a logical unit, or cluster (for example, products installed under a cluster environment
Introducing Trend Micro Control Manager 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: B-7
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