D-Link DI-704UP - Manual (Page 30)

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Using the Configuration Menu (continued)
Advanced > Virtual Server
The DI-704UP can be configured as a virtual server so that remote users accessing Web
or FTP services via the public IP address can be automatically redirected to local servers
in the LAN (Local Area Network). The DI-704UP firewall feature filters out unrecognized
packets to protect your LAN network so all computers networked with the DI-704UP are
invisible to the outside world. If public access is desired, you can make some of the LAN
computers accessible from the Internet by enabling Virtual Server. Depending on the
requested service, the DI-704UP redirects the external service request to the appropriate
server within the LAN network.