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Page 71 / 104 Scroll up to view Page 66 - 70
71
DI-624M User’s Manual
D-Link Systems, Inc.
Frequently Asked Questions
Step 3:
Check
Enabled
to activate entry.
Step 4:
Enter a name for your virtual server entry.
Step 5:
Next to
Private IP
, enter the IP Address of the computer on your local network
that you want to allow the incoming service to.
Step 6:
Choose
Protocol Type
- either TCP, UDP, or both. If you are not sure, select
both.
Step 7:
Enter the port information next to
Private Port
and
Public Port
. The private and
public ports are usually the same. The public port is the port seen from the WAN side,
and the private port is the port being used by the application on the computer within
your local network.
Step 8:
Enter the
Schedule
information.
Step 9:
Click
Apply
and then click
Continue
.
Note: Make sure DMZ host is disabled. If DMZ is enabled, it will disable all Virtual
Server entries.
Because our routers use NAT (Network Address Translation), you can only open a
specific port to one computer at a time. For example: If you have 2 web servers on your
network, you cannot open port 80 to both computers. You will need to configure 1 of the
web servers to use port 81. Now you can open port 80 to the first computer and then
open port 81 to the other computer.
Page 72 / 104
72
DI-624M User’s Manual
D-Link Systems, Inc.
Frequently Asked Questions
6
What is DMZ?
Demilitarized Zone:
In computer networks, a DMZ (demilitarized zone) is a computer host or small network
inserted as a neutral zone between a company´s private network and the outside public
network. It prevents outside users from getting direct access to a server that has company
data. (The term comes from the geographic buffer zone that was set up between North
Korea and South Korea following the UN police action in the early 1950s.) A DMZ is an
optional and more secure approach to a firewall and effectively acts as a proxy server
as well.
In a typical DMZ configuration for a small company, a separate computer (or host in
network terms) receives requests from users within the private network for access to
Web sites or other companies accessible on the public network. The DMZ host then
initiates sessions for these requests on the public network. However, the DMZ host is
not able to initiate a session back into the private network. It can only forward packets
that have already been requested.
Users of the public network outside the company can access only the DMZ host. The
DMZ may typically also have the company´s Web pages so these could be served to
the outside world. However, the DMZ provides access to no other company data. In the
event that an outside user penetrated the DMZ hosts security, the Web pages might be
corrupted but no other company information would be exposed. D-Link, a leading maker
of routers, is one company that sells products designed for setting up a DMZ
7 How do I configure the DMZ Host?
The DMZ feature allows you to forward all incoming ports to one computer on the local
network. The DMZ, or Demilitarized Zone, will allow the specified computer to be
exposed to the Internet. DMZ is useful when a certain application or game does not
work through the firewall. The computer that is configured for DMZ will be completely
vulnerable on the Internet, so it is suggested that you try opening ports from the Virtual
Server or Firewall settings before using DMZ.
Step 1:
Find the IP address of the computer you want to use as the DMZ host.
To find out how to locate the IP Address of the computer in Windows XP/2000/ME/9x or
Macintosh operating systems please refer to Step 4 of the first question in this section
(Frequently Asked Questions).
Page 73 / 104
73
DI-624M User’s Manual
D-Link Systems, Inc.
Frequently Asked Questions
Step 2:
Log into the web based configuration of the router by typing in the IP Address of
the router (default:192.168.0.1) in your web browser. The username is
admin
(all
lowercase) and the password is
blank
(nothing)
Step 3:
Click the
Advanced
tab and then click on the
DMZ
button. Select
Enable
and
type in the IP Address you found in step 1.
Step 4:
Click
Apply
and then
Continue
to save the changes.
Note: When DMZ is enabled, Virtual Server settings will still be effective. Remember,
you cannot forward the same port to multiple IP Addresses, so the Virtual Server settings
will take priority over DMZ settings.
Page 74 / 104
74
DI-624M User’s Manual
D-Link Systems, Inc.
Frequently Asked Questions
8 Ho
w do I open a rang
e of por
ts on m
y DI-624M using
Firewall rules?
Step 1:
Access the router’s Web configuration by entering the router’s IP Address in
your Web browser. The default IP Address is
192.168.0.1
. Login using your password.
The default username is
“admin”
and the password is blank.
If you are having difficulty accessing Web management, please see the first question in
this section.
Step 2:
From the Web management Home page, click the
Advanced
tab then click the
Firewall
button.
Step 3:
Click on
Enabled
and type in a name for the new rule.
Step 4:
Choose
WAN
as the
Source
and enter a range of IP Addresses out on the
internet that you would like this rule applied to. If you would like this rule to allow all
internet users to be able to access these ports, then put an
Asterisk
in the first box and
leave the second box empty.
Step 5:
Select
LAN
as the
Destination
and enter the IP Address of the computer on
your local network that you want to allow the incoming service to. This will not work with
a range of IP Addresses.
Page 75 / 104
75
DI-624M User’s Manual
D-Link Systems, Inc.
Frequently Asked Questions
Step 6:
Enter the port or range of ports that are required to be open for the incoming
service.
Step 7:
Click
Apply
and then click
Continue
.
Note: Make sure DMZ host is disabled.
Because our routers use NAT (Network Address Translation), you can only open a
specific port to one computer at a time. For example: If you have 2 web servers on your
network, you cannot open port 80 to both computers. You will need to configure 1 of the
web servers to use port 81. Now you can open port 80 to the first computer and then
open port 81 to the other computer.
9
What are vir
tual ser
ver
s?
A Virtual Server is defined as a service port, and all requests to this port will be redirected
to the computer specified by the server IP. For example, if you have an FTP Server (port
21) at 192.168.0.5, a Web server (port 80) at 192.168.0.6, and a VPN server at
192.168.0.7, then you need to specify the following virtual server mapping table:
10 Ho
w do I use
PC An
ywhere
with m
y DI-624M r
outer?
You will need to open 3 ports in the Virtual Server section of your D-Link router.
Step 1:
Open your web browser and enter the IP Address of the router (192.168.0.1).
Step 2:
Click on
Advanced
at the top and then click
Virtual Server
on the left side.
Server Port
Server IP
Enable
21
192.168.0.5
X
80
192.168.0.6
X
1723
192.168.0.7
X

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