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2.6.1 Port Forwarding

The Port Forwarding allows you to re-direct a particular range of service port numbers (from the

Internet/WAN Ports) to a particular LAN IP address. It help you to host some servers behind the

router NAT firewall.

Parameter

Description

Enable Port Forwarding

Enable Port Forwarding

Private IP

This is the private IP of the server behind the

NAT firewall.

Note:

You need to give your LAN PC clients a

fixed/static IP address for Port Forwarding to

work properly.

Type

This is the protocol type to be forwarded. You

can choose to forward

“

TCP

”

or

“

UDP

”

packets

only or select

“

both

”

to forward both

“

TCP

”

and

“

UDP

”

packets.

Port Range

The range of ports to be forward to the private IP.

Comment

The description of this setting.

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Add Port Forwarding into the table

Fill in the "Private IP",

“

Type

”

,

“

Port Range

”

and

"Comment" of the setting to be added and then

click "Add". Then this Port Forwarding setting

will be added into the "Current Port Forwarding

Table" below. If you find any typo before adding

it and want to retype again, just click "Clear" and

the fields will be cleared.

Remove Port Forwarding into the table

If you want to remove some Port Forwarding

settings from the " Current Port Forwarding

Table", select the Port Forwarding settings you

want to remove in the table and then click

"Delete Selected". If you want remove all Port

Forwarding settings from the table, just click

"Delete All" button. Click "Reset" will clear your

current selections.

Click <

Apply>

at the bottom of the screen to save the above configurations. You can now

configure other advance sections or start using the router (with the advance settings in place)

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2.6.2 Virtual Server

Use the Virtual Server function when you want different servers/clients in your LAN to handle

different service/Internet application type (e.g. Email, FTP, Web server etc.) from the Internet.

Computers use numbers called port numbers to recognize a particular service/Internet application

type. The Virtual Server allows you to re-direct a particular service port number (from the

Internet/WAN Port) to a particular LAN private IP address and its service port number. (See

Glossary for an explanation on Port number)

Parameters

Description

Enable Virtual Server

Enable Virtual Server.

Private IP

This is the LAN client/host IP address that the Public Port

number packet will be sent to.

Note:

You need to give your LAN PC clients a fixed/static IP

address for Virtual Server to work properly.

Private Port

This is the port number (of the above Private IP host) that the

below Public Port number will be changed to when the packet

enters your LAN (to the LAN Server/Client IP)

Type

Select the port number protocol type (TCP, UDP or both). If you

are unsure, then leave it to the default both protocol.

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Public Port

Enter

the service

(service/Internet application)

port number

from the Internet that will be re-directed to the above Private IP

address host in your LAN

Note

: Virtual Server function will have priority over the DMZ

function if there is a conflict between the Virtual Server and the

DMZ settings.

Comment

The description of this setting.

Add Virtual Server

Fill in the "Private IP", "Private Port", "Type",

“

Public

Port

”

and "Comment" of the setting to be added and then

click "Add". Then this Virtual Server setting will be added

into the "Current Virtual Server Table" below. If you find

any typo before adding it and want to retype again, just

click "Clear" and the fields will be cleared.

Remove Virtual Server

If you want to remove some Virtual Server settings from

the " Current Virtual Server Table", select the Virtual

Server settings you want to remove in the table and then

click "Delete Selected". If you want remove all Virtual

Server settings from the table, just click "Delete All" button.

Click "Reset" will clear your current selections.

Click <

Apply>

at the bottom of the screen to save the above configurations. You can now

configure other advance sections or start using the router (with the advance settings in place)

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Example: Virtual Server

The diagram below demonstrates one of the ways you can use the Virtual Server function. Use

the Virtual Server when you want the web server located in your private LAN to be accessible to

Internet users. The configuration below means that any request coming form the Internet to

access your web server will be translated to your LAN

’

s web server (192.168.2.2).

Note:

For the

virtual server to work properly Internet/remote users must know your global IP address. (For

websites you will need to have a fixed/static global/public IP address)