Wireless ADSL Router
HRDSL521W
40
DMZ
The DMZ Host is a local computer exposed to the Internet. When setting a particular
internal IP address as the DMZ Host, all incoming packets will be checked by the Firewall
and NAT algorithms then passed to the DMZ host, when a packet received does not use a
port number used by any other Virtual Server entries.
DMZ:
Disabled:
As set in default setting, it disables the DMZ function.
Enabled:
It activates your DMZ function.
DMZ Host IP Address:
Give a static IP address to the DMZ Host when
Enabled
radio
button is checked. Be aware that this IP will be exposed to the WAN/Internet.
Select the
Apply
button to apply your changes.
Virtual Server
In TCP/IP and UDP networks a port is a 16-bit number used to identify which application
program (usually a server) incoming connections should be delivered to. Some ports have
numbers that are pre-assigned to them by the IANA (the Internet Assigned Numbers
Authority), and these are referred to as “well-known ports”. Servers follow the well-known
port assignments so clients can locate them.
If you wish to run a server on your network that can be accessed from the WAN (i.e. from
other machines on the Internet that are outside your local network), or any application that
can accept incoming connections (e.g. Peer-to-peer/P2P software such as instant
messaging applications and P2P file-sharing applications) and are using NAT (Network
Address Translation), then you will usually need to configure your router to forward these
incoming connection attempts using specific ports to the PC on your network running the
application. You will also need to use port forwarding if you want to host an online game
server.
