TRENDnet Cable Modem/xDSL TW100-W1CA - Manual (Page 15)

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SubNetmask
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: Provided by our ISP.
Gateway/DNS server #1/DNS server #2: These values will be automatically provided once
you click “Obtain global port configuration automatically”. You can change the values if
necessary.
Virtual Server
Being a natural Internet firewall, this IP Sharing device protects your network from being
accessed by outside users. When there is application that requires outside users to access
internal servers (e.g. Web Server, Ftp Server, e-mail Server or News Server), this device can act
as a virtual server to public services. You can set up a local server with specific port number
which stands for the service (e.g. web(80), FTP(21), Telnet(23)). When this device receives an
incoming access request for this specific port, it will be forwarded to the corresponding
internal server.
Figure 10
Single Port/Port Range: For selecting between a specific port and a range of ports which you
want the Internet users to be able to access. The valid port number ranges from 0 to 65535.
Browse: If DHCP function is enabled, the distributed IP Addresses will appear on the screen.
You can select the desired IP address (for the specified port) and add it to the server list.
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If you checked PPPoE in Management tab (see the Management section), the “Obtain global port
configuration automatically” and the “Set static global port configuration” fields are grayed out and
will not accept any input.