User manual

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3.2.2. Forwarding Rules
3.2.2.1.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, y ou 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 Ser ver can work with Scheduling Rules ,
and give user more flexibility on Access c ontrol. For the details, please refer to Scheduling
Rule .
For example, if you have an FTP server (port 21) at 192.168.1.1 , a Web server (port 80) at
192.168.1.2, and a VPN server at 192.168.1.6, then you need to specify the following virtual
serve r mapping table: