TD-W8910G

54M Wireless ADSL2+ Router User Guide

5.4.3.1. Virtual Servers

Choose “

Advanced Setup

”

Æ

“

NAT

”

Æ

“

Virtual Servers

”, you can set up virtual servers on the

screen below (shown in Figure 5-17).

Virtual servers can be used for setting up public services on your LAN, such as DNS, Email and

FTP. A virtual server is defined as a service port, and all requests from the Internet to this service

port will be redirected to the computer specified by the server IP. Any PC that was used for a

virtual server must have a static or reserved IP Address because its IP Address may change

when using the DHCP function.

Figure 5-17

¾

Virtual Server Table:

The table indicates the information about the Virtual Server entries.

±

Server Name:

This is the name of the

Virtual Server

. It is exclusive and must be filled

in.

±

External Port Start:

The base number of External Ports. You can type a service port or

leave it blank.

±

External Port End:

The end number of External Ports. You can type a service port or

leave it blank.

±

Protocol:

The protocol used for this application,

TCP

,

UDP

, or

TCP/UDP

.

±

Internal Port Start:

The base number of Internal Ports. You can type a service port or

leave it blank.

±

Internal Port End:

The end number of Internal Ports. You can type a service port or

leave it blank.

±

Server IP Address:

The IP Address of the PC providing the service application.

¾

Add:

Click the

Add

button to add a new entry.

¾

Remove:

Select the check box in the table (shown in Figure 5-17) and then click the

Remove

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TD-W8910G

54M Wireless ADSL2+ Router User Guide

button, then the corresponding entry will be deleted in the table.

To setup a virtual server entry:

1.

Click the

Add

button on the screen above (pop-up Figure 5-17), and then you will set the

new Virtual Server in the next screen (shown in Figure 5-18).

Figure 5-18

2.

Select the service which you want to use from the drop-down list. If the list does not have the

service you need, type the name of the custom service in the text box.

3.

Type the IP Address of the computer in the

Server IP Address

text

box.

4.

Enter the External Port Start, External Port End, Internal Port Start and Internal Port End in

the table, and then select the protocol used for this Virtual Server,

TCP

,

UDP

or

All

.

5.

Click the

Save/Apply

button to enable virtual server.

Note:

If you select the service from the drop-down list, the External Port Start, External Port End,

Internal Port Start, Internal Port End and the Protocol will be added in the table automatically.

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TD-W8910G

54M Wireless ADSL2+ Router User Guide

You only need to enter the Server IP Address for the Virtual Server.

5.4.3.2. Port Triggering

Choose “

Advanced Setup

”

Æ

“

NAT

”

Æ

“

Port Triggering

”, you can set Port Triggering on the

screen (shown in Figure 5-19).

Some applications require that specific ports in the Router's firewall should be opened for access

by remote devices. Port Trigger dynamically opens up the 'Open Ports' in the firewall when an

application on the LAN initiates a TCP/UDP connection to a remote device using the triggering

ports. The Router allows the remote party from the WAN side to establish new connections back

to the application on the LAN side using the open ports. A maximum 32 entries can be configured.

Figure 5-19

¾

Port Triggering Table:

The table indicates the information about the Port Triggering entries.

±

Application (Name):

This is the name of the

Port Triggering

. It is exclusive and must

be filled.

±

Trigger:

It includes the Protocol and the Start and End value of the Trigger Ports.

±

Open:

It includes the Protocol and the Start and End value of the Open Ports

¾

Add:

Click the button to add a new entry.

¾

Remove:

Select the check box in the table (shown in Figure 5-19) and then click the

Remove

button, then the corresponding entry will be deleted in the table.

To add a new Port Triggering:

1.

Click the

Add

button (pop-up Figure 5-19), and then you will set the new Port Triggering in

38

TD-W8910G

54M Wireless ADSL2+ Router User Guide

the next screen (shown in Figure 5-20).

Figure 5-20

2.

Select the application from the drop-down list. If the list does not have the application that

you want, select the

Custom application

radio-button, and type the name of the custom

application in the text box.

3.

Enter the

Trigger Port Start

,

Trigger Port End

,

Open Port Start

and

Open Port End

in the

table, and then select the

Trigger protocol

and

Open protocol

,

TCP

,

UDP

or

All

.

4.

Click the

Save/Apply

button to enable the settings.

Note:

If you select the application from the drop-down list, the External Port Start, External Port End,

Internal Port Start, Internal Port End and the Protocol will be added in the table automatically.

5.4.3.3. DMZ Host

Choose “

Advanced Setup

”

Æ

“

NAT

”

Æ

“

DMZ Host

”, you can set up DMZ Host on the screen

(shown in Figure 5-21).

The DMZ host feature can make a local host be exposed to the Internet for a special-purpose

service, such as online gaming or video conferencing.

39

TD-W8910G

54M Wireless ADSL2+ Router User Guide

Figure 5-21

To add a new DMZ Host

:

You can enter the computer's IP address and then click

Save/Apply

to activate the DMZ host you

set on this page.

Note:

DMZ host forwards all the ports at the same time. Any PC whose port is being forwarded must

have its DHCP client function disabled and should have a new static IP Address assigned to it

because its IP Address may change while using the DHCP function.

5.4.3.4. ALG

Choose “

Advanced Setup

”

Æ

“

NAT

”

Æ

“

ALG

”, you can Enable SIP (Session Initiation Protocol) on

the ALG (Application Level Gateway) screen (shown in Figure 5-22).

Figure 5-22

5.4.4 Security

When you select the

Enable Security

function (shown in Figure 5-11) for the connection type of

MER

or

IPoA

for the WAN Setup, or when you setup

Bridge

,

PPPoA or PPPoE

mode for WAN

interface, you will see the

Security

menu in the Web-based Utility (shown in Figure 5-23). It

includes

IP Filtering

,

MAC Filtering

(only effective in Bridge mode) and

Parental Control

submenus.

40