User Manual
Aolynk DR814Q ADSL2+ Broadband Router
5 Advanced Configuration
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II. Set the virtual server
When NAT (network address translation) is enabled on an internal network device,
access to it from the Internet will be forbidden. In this case, a virtual server is needed if
you want to provide public services (Web services, E-mail, FTP, for example) to outside.
Although the internal address is still inaccessible for external users, the DR814Q can
identify service requests and forward them to the virtual server.
Table 5-2
Description of virtual server setting items
Item
Description
Internal Address
Type in the IP address of the internal PC that will provide the
application service.
Protocol
Select the protocol of the application service.
External Port
Range
Type in the range of ports that the application provides for
access from outside.
Internal Port Range Type in the range of ports that the application actually uses.
After the configuration, click <Add>. The virtual server is added to the virtual server list.
You can click <Delete> to delete the corresponding virtual server.
Example: To configure the PC with the address 192.168.1.100 as a virtual server to
provide an FTP service for the outside (with the port number 21), refer to the
configuration in Figure 5-6. Thus, all FTP requests from the Internet users will be
forwarded to the PC (server) with the fixed IP address 192.168.1.100.
Caution:
The values for [Internal Port Range] and [External Port Range] should be set as the
same, or the configuration will fail.
III. Set the DMZ host
The Demilitarized Zones (DMZ) host is actually a default virtual server. When the
DR814Q receives a connection request from the external network, it first searches the
virtual service list for a matching item. If a corresponding item is found, the DR814Q
forwards the request message to the corresponding virtual server. Otherwise, it
forwards the message to the DMZ host.
Type the IP address of the PC to be used as the DMZ host in the [DMZ Host IP Address]
field.
