D-Link DIR-855 Router Manual PDF (Setup & Configuration Guide)

Page 36 / 96 Scroll up to view Page 31 - 35

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D-L±nk DIR-855 User Manual

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DHCP Reservation

If you want a computer or device to always have the same IP address assigned, you can create a DHCP reservation.

The router will assign the IP address only to that computer or device.

Note:

This IP address must be within the DHCP IP Address Range.

Check this box to enable the reservation.

Enter the computer name or select from the drop-

down menu and click

<<

.

Enter the IP address you want to assign to the

computer or device. This IP Address must be within

the DHCP IP Address Range.

Enter the MAC address of the computer or

device.

If you want to assign an IP address to the computer

you are currently on, click this button to populate

the ﬁelds.

Click

Save

to save your entry. You must click

Save

Settings

at the top to activate your reservations.

Enable:

Computer Name:

IP Address:

MAC Address:

Copy Your PC’s MAC

Address:

Save:

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The DIR-855 can be conﬁgured as a virtual server so that remote users accessing Web or FTP services via the public

IP address can be automatically redirected to local servers in the LAN (Local Area Network).

The DIR-855 ﬁrewall feature ﬁlters out unrecognized packets to protect your LAN network so all computers networked

with the DIR-855 are invisible to the outside world. If you wish, you can make some of the LAN computers accessible

from the Internet by enabling Virtual Server. Depending on the requested service, the DIR-855 redirects the external

service request to the appropriate server within the LAN network.

The DIR-855 is also capable of port-redirection meaning incoming trafﬁc to a particular port may be redirected to a

different port on the server computer.

Each virtual service that is created will be listed at the bottom of the screen in the Virtual Servers List. There are

pre-deﬁned virtual services already in the table. You may use them by enabling them and assigning the server IP to

use that particular virtual service.

For a list of ports for common applications, please visit

http://support.dlink.com/faq/view.asp?prod_id=1191

.

Virtual Server

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This will allow you to open a single port. If you would like to open a range of ports, refer to page 35.

Enter a name for the rule or select an application

from the drop-down menu. Select an application

and click

<<

to populate the ﬁelds.

Enter the IP address of the computer on your

local network that you want to allow the incoming

service to. If your computer is receiving an IP

address automatically from the router (DHCP),

you computer will be listed in the “Computer

Name” drop-down menu. Select your computer

and click

<<

.

Enter the port that you want to open 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 Internet side, and

the private port is the port being used by the

application on the computer within your local

network.

Select

TCP

,

UDP

, or

Both

from the drop-down

menu.

The schedule of time when the Virtual Server

Rule will be enabled. The schedule may be set

to Always, which will allow the particular service

to always be enabled. You can create your own

times in the

Tools

>

Schedules

section.

Select

Allow All

(most common) or a created

Inbound ﬁlter. You may create your own inbound

ﬁlters in the

Advanced > Inbound Filter

page.

Name:

IP Address:

Private Port/

Public Port:

Protocol Type:

Schedule:

Inbound Filter:

Page 39 / 96

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This will allow you to open a single port or a range of ports.

Port Forwarding

Enter a name for the rule or select an application

from the drop-down menu. Select an application

and click

<<

to populate the ﬁelds.

Enter the IP address of the computer on your

local network that you want to allow the incoming

service to. If your computer is receiving an IP

address automatically from the router (DHCP),

you computer will be listed in the “Computer

Name” drop-down menu. Select your computer

and click

<<

.

Enter the TCP and/or UDP port or ports that you

want to open. You can enter a single port or a

range of ports. Seperate ports with a common.

Example: 24,1009,3000-4000

The schedule of time when the Virtual Server

Rule will be enabled. The schedule may be set

to Always, which will allow the particular service

to always be enabled. You can create your own

times in the

Tools

>

Schedules

section.

Select

Allow All

(most common) or a created

Inbound ﬁlter. You may create your own inbound

ﬁlters in the

Advanced > Inbound Filter

page.

Name:

IP Address:

TCP/UDP:

Schedule:

Inbound Filter:

Page 40 / 96

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Enter a name for the rule. You may select a

pre-deﬁned application from the drop-down

menu and click

<<

.

This is the port used to trigger the application. It

can be either a single port or a range of ports.

Select the protocol of the trigger port (TCP,

UDP, or Both).

This is the port number on the Internet side that

will be used to access the application. You may

deﬁne a single port or a range of ports. You

can use a comma to add multiple ports or port

ranges.

Select the protocol of the ﬁrewall port (TCP,

UDP, or Both).

The schedule of time when the Application Rule

will be enabled. The schedule may be set to

Always, which will allow the particular service

to always be enabled. You can create your own

times in the

Tools

>

Schedules

section.

Name:

Trigger:

Trafﬁc Type:

Firewall:

Trafﬁc Type:

Schedule:

Application Rules

Some applications require multiple connections, such as Internet gaming, video conferencing, Internet telephony and

others. These applications have difﬁculties working through NAT (Network Address Translation). Special Applications

makes some of these applications work with the DIR-855. If you need to run applications that require multiple connections,

specify the port normally associated with an application in the “Trigger Port” ﬁeld, select the protocol type as TCP or

UDP, then enter the ﬁrewall (public) ports associated with the trigger port to open them for inbound trafﬁc.

The DIR-855 provides some predeﬁned applications in the table on the bottom of the web page. Select the application

you want to use and enable it.

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