Broadband Products xDSL/Cable - Manual (Page 24)

Wireless Broadband Router User Guide 20
Enable DHCP server: To enable the DHCP server and allow the router to automatically assign private
IP addresses to requesting device, check this box.
Dynamic IP Address Assignment: IP addresses are normally assigned from the entire pool
of available addresses in the IP “subnet” to which the router is attached. If you want to reserve
some addresses for other purposes you can modify this address pool in the From/To boxes
and the press SUBMIT.
From: Start IP address
To: End IP address
Static IP Address Assignment: If you require that specific PCs always obtain the same IP
addresses, enter the PC’s MAC address and the IP address to assign via the DHCP process
and press ADD.
MAC address: The MAC address of the PC.
IP address: The IP address to assign to the PC.
Static IP Address Assignment List: All configured Static IP Address Assignment entries ap-
pear in the displayed table. Entries may be deleted by first selecting the entry and then press-
ing the DELETE SELECTED button.
Virtual Server Settings
By default, a privately addressed PC on your LAN or any program or service running in a pri-
vately addressed PC on your LAN cannot neither be seen nor accessed from the Internet.
However, if you have a service, such as a Web server or an FTP server, on your LAN that you
would like to be accessible from the Internet, the settings on this page allows you to do so.
Since each IP service uses a special address called a “TCP/UDP Port”, the router can trans-
late this request to a destination on your private LAN. The remote Internet user uses the ad-
dress of the router as if it was the LAN-resident server and the router does the translation
automatically. Thus, the Internet user is never in direct contact with the PC providing the serv-
ice and the router then acts as a proxy for this service to the Internet user. You may define
multiple entries by first entering the Public Port Number and then the Private Port Number and
Private IP Address to which the Public Port translates. The Drop-down list provides port num-
bers for standard applications as well as a Customization entry for you define your own port
numbers. A special case is the DMZ server, or default virtual server. If you configure this de-
vice, all requests to ports that are otherwise unrecognized are directed to the machine with the
specified private IP address. You cannot enter port numbers when you define the DMZ server.
Service Name: Choose the service to be redirected. You can select some of the popular TCP
services from the drop-down list. If you want to define your own Public Port
Numbers, choose the CUSTOM entry in the drop-down list.
Public Port: The destination port number as seen from the Internet using the Public IP ad-
dress of the router. This field is only changeable when CUSTOM is selected as the Service
Name.