LevelOne WBR-6012 - Manual (Page 40)

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2.4.2.1 Virtual Server
This product’s NAT firewall filters out unrecognized packets to protect your Intranet, so all
hosts behind this product are invisible to the outside world. If you wish, you can make some of
them accessible by enabling the Virtual Server Mapping.
A virtual server is defined as a Service Port, and all requests to this port will be redirected to
the computer specified by the Server IP. Virtual Server can work with Scheduling Rules,
and give user more flexibility on Access control. For Detail, please refer to Scheduling Rule.