TL-R480T

SMB Broadband Router User Guide

30

reserve IP address.

¾

Assigned IP Address -

This field displays the IP address of the router reserved.

¾

Status

-

This field displays the status of the virtual server entry.

Enabled

means that the

entry will take effect,

Disabled

means that the entry will not take effect.

To add/modify a reserved IP address:

Step 1:

Click

Add New…

/

Modify

shown in Figure 4-17, you will see a new screen shown in

Figure 4-18.

Step 2:

Enter the MAC address, IP address and select Status as shown in the screen below.

Figure 4-18

Step 3:

Click the

Save

button when finished.

)

Note:

4)

If you want to add more than one reserved IP, please go to

step 1

to continue.

5)

The function won't take effect until the router reboots.

Other configurations for the entries as shown in Figure 4-17

:

Click the

Delete

button to delete the entry.

Click the

Enable All

button to enable all the entries.

Click the

Disable All

button to disable all the entries.

Click the

Delete All

button to delete all the entries.

Click the

Previous

button to view the information in the previous screen,

click the

Next

button to

view the information in the next screen.

4.5

Forwarding

Choose menu “

Forwarding

”, you can see the submenus under the main menu:

Virtual Servers

,

Port Triggering

,

DMZ

and

UPnP

.

TL-R480T

SMB Broadband Router User Guide

31

Figure 4-19

Click any of them, and you will be able to configure the corresponding function. The detailed

explanations for each submenu are provided below.

4.5.1

Virtual Servers

Choose menu “

Forwarding

→

Virtual Servers

”, you can view and add virtual servers in the next

screen (shown in Figure 4-20).

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 Internet to this service port

will be redirected to the computer specified by the server IP. Any PC that was configured as a

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

when using the DHCP function.

Figure 4-20

¾

Service Port

-

This field displays the numbers of External Ports. It can be a service port or a

range of service ports (the format is XXX - YYY, XXX is Start port, YYY is End port).

¾

IP Address

-

This field displays the IP address of the PC running the service application.

¾

Protocol

-

This field displays the protocol used for this application, either

TCP

,

UDP

, or

All

(all protocols supported by the router).

¾

Status

-

This field displays the status of the virtual server entry.

Enabled

means that the

entry will take effect,

Disabled

means that the entry will not take effect.

To add/modify a virtual server entry:

Step 1:

Click

Add New…

/

Modify

shown in Figure 4-17, you will see a new screen shown in

Figure 4-21.

Step 2:

Select the service you want from the “

Common Service Port

”, then the port and

protocol value will be added to the corresponding field automatically, you only need to

configure the IP address for the virtual server; If the “

Common Service Port

” does not

TL-R480T

SMB Broadband Router User Guide

32

contain the service that you want, please configure the Service Port, IP Address and

Protocol manually.

Figure 4-21

Step 3:

After that, select

Enable

to make the entry take effect.

Step 4:

Click

Save

button to save the configuration.

)

Note:

6)

If you want to add more than one reserved IP, please go to

step 1

to continue.

7)

It is possible that you configure more than one type of available service on a computer or

server, it means the IP addresses for the virtual servers are same.

Other configurations for the entries as shown in Figure 4-21:

Click the

Delete

button to delete the entry.

Click the

Enable All

button to enable all the entries.

Click the

Disable All

button to disable all the entries.

Click the

Delete All

button to delete all the entries.

Click the

Previous

button to view the information in the previous screen,

click the

Next

button to

view the information in the next screen.

)

Note:

If you set the virtual server of the service port as 80, you must set the web management port on

System Tools –> Remote Management

screen to be any value except 80 such as 8080. Or else

there will be a conflict to disable the virtual server.

4.5.2

Port Triggering

Choose menu “

Forwarding

→

Port Triggering

”, you can view and add port triggerings in the next

screen (shown in Figure 4-22).

Some applications require multiple connections, like Internet games, video conferencing, Internet

calling and so on. These applications cannot work with a pure NAT router. Port Triggering is used

TL-R480T

SMB Broadband Router User Guide

33

for some of these applications that can work with an NAT router.

Figure 4-22

¾

Trigger Port

-

This displays the port for outgoing traffic. An outgoing connection using this

port will "Trigger" this rule.

¾

Trigger Protocol

-

This displays the protocol used for Trigger Ports, either

TCP

,

UDP

, or

All

(all protocols supported by the router).

¾

Incoming Ports

-

This displays the port or port range used by the remote system, they are

used for responding to the outgoing request. A response using one of these ports will be

forwarded to the PC that triggered this rule. You can input at most 5 groups of ports (or port

section). Every group of ports must be apart with ",". For example, 2000-2038, 2050-2051,

2085, 3010-3030.

¾

Incoming Protocol

-

This displays the protocol used for Incoming Ports Range, either

TCP

or

UDP

, or

ALL

(all protocols supported by the router).

¾

Status

-

This displays the status.

Enabled

means that the rule will take effect,

Disabled

means that the rule will not take effect.

Once configured, the operation for Port Triggering will proceed as follows:

Step 1:

A local host makes an outgoing connection using a destination port number defined in

the Trigger Port field.

Step 2:

The router records this connection, opens the incoming port or ports associated with this

entry in the Port Triggering table, and associates them with the local host.

Step 3:

When necessary, the external host will be able to connect to the local host using one of

the ports defined in the Incoming Ports

field.

To add/modify a port triggering entry:

Step 1:

Click

Add New…

/

Modify

shown in Figure 4-22, you will see a new screen shown in

Figure 4-23.

Step 2:

Select the application you want from the “

Common Applications

”, then the Trigger port

and Incoming ports will be added to the corresponding field automatically, you only need

to configure the Trigger protocol and Incoming Protocol for the entry; If the “

Common

Applications

” does not contain the applications that you want, please configure these

TL-R480T

SMB Broadband Router User Guide

34

options manually.

Figure 4-23

Step 3:

After that, select

Enabled

to make the entry take effect.

Step 4:

Click

Save

button to save the configuration.

)

Note:

1)

If you want to add more than one reserved IP, please go to

step 1

to continue.

2)

When the trigger connection is released, the according opening ports will be closed.

3)

Each rule allowed to be used only by one host on LAN synchronously. The trigger

connection of other hosts on LAN will be refused.

4)

Incoming Port Range cannot overlap each other.

Other configurations for the entries as shown in Figure 4-23:

Click the

Delete

button to delete the entry.

Click the

Enable All

button to enable all the entries.

Click the

Disable All

button to disable all the entries.

Click the

Delete All

button to delete all the entries.

Click the

Previous

button to view the information in the previous screen,

click the

Next

button to

view the information in the next screen.

4.5.3

DMZ

Choose menu “

Forwarding

→

DMZ

”, you can view and configure DMZ host in the screen (shown

in Figure 4-24).

The DMZ host feature allows one local host to be exposed to the Internet for a special-purpose

service such as Internet gaming or videoconferencing. 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 when

using the DHCP function.