D-Link DI-804HV Router Manual PDF (Setup & Configuration Guide)

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126

Frequently Asked Questions (continued)

How do I open ports on my router?

To allow traffic from the internet to enter your local network, you will need to open up

ports or the router will block the request.

Step 1

Open your web browser

and enter the IP Address of your D-

Link router (192.168.0.1). Enter

username (admin) and your

password (blank by default).

Step 2

Click on

Advanced

on top

and then click

Virtual Server

on

the left side.

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.

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127

Frequently Asked Questions (continued)

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

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).

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128

Frequently Asked Questions (continued)

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)

How do I configure the DMZ Host? (continued)

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.

DI-624

DI-804HV

admin

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129

Frequently Asked Questions (continued)

How do I open a range of ports on my DI-804HV 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

.

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

.

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.

Note:

Make sure DMZ host is disabled.

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130

Frequently Asked Questions (continued)

What are virtual servers?

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:

Server Port

Server IP

Enable

21

192.168.0.5

X

80

192.168.0.6

X

1723

192.168.0.7

X

How do I use

PC Anywhere

with my DI-804HV router?

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.

Step 3

Enter the information as

seen below. The

Private IP

is

the IP Address of the computer

on your local network that you

want to connect to.

Step 4

The first entry will read

as shown here:

Step 5

Click

Apply

and then click

Continue

.

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