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3.6.3.6 Virtual Server
When you click Virtual Server, you get the following figure.
Being a natural Internet firewall, this network router protects your network from being
accessed by outside users. When it needs to allow outside users to access internal servers,
e.g. Web server, FTP server, E-mail server or News server, this modem can act as a virtual
server. You can set up a local server with specific a port number that stands for the service,
e.g. Web (80), FTP (21), Telnet (23), SMTP (25), POP3 (110), When an incoming access
request to the router for a specified port is received, it will be forwarded to the corresponding
internal server.
For example, if you set the Service Port number 80 (Web) to be mapped to the IP Address
192.168.1.2, then all the http requests from outside users will be forwarded to the local server
with IP address of 192.168.1.2. If the port is not listed as a predefined application, you need
to add it manually.
If you have disabled the NAT option in the WAN-ISP section, this Virtual
Server function will hence be invalid.
If the DHCP server option is enabled, you have to be very careful in
assigning the IP addresses of the virtual servers in order to avoid conflicts.
The easy way is that the IP address assigned to each virtual server should
not fall into the range of IP addresses that are to be issued by the DHCP
server. You can configure the virtual server IP address manually, but it is still
in the same subnet with the router.