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4.6 Virtual Server
The DI-704’s NAT firewall filters out unrecognized packets to protect your Intranet, so all
hosts behind the DI-704 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.
For example, if you have an FTP server (port 21) at 192.168.123.1, a Web server (port 80) at
192.168.123.2, and a VPN server at 192.168.123.6, then you need to specify the following
virtual server mapping table:
Service Port Server IP Enable
21 192.168.123.1 V
80 192.168.123.2 V
1723 192.168.123.6 V