TP-Link TL-WR842ND Router Manual PDF (Setup & Configuration Guide)

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TL-WR842ND

300Mbps Multi-Function Wireless N Router

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4.10 Forwarding

Figure 4-50 The Forwarding menu

There are four submenus under the Forwarding menu (shown in Figure 4-50):

Virtual Servers

,

Port Triggering

,

DMZ

and

UPnP

. Click any of them, and you will be able to configure the

corresponding function.

4.10.1 Virtual Servers

Choose menu “

Forwarding

→

Virtual Servers

”, and then you can view and add virtual servers in

the next screen (shown in Figure 4-51). Virtual servers can be used for setting up public services

on your LAN. 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 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 4-51

Virtual Servers

¾

Service Port

- The numbers of External Service Ports. You can enter a service port or a

range of service ports (the format is XXX – YYY; XXX is the Start port and YYY is the End

port).

¾

Internal Port

- The Internal Service Port number of the PC running the service application.

You can leave it blank if the

Internal Port

is the same as the

Service Port

, or enter a

specific port number when

Service Port

is a single one.

¾

IP Address

- The IP address of the PC running the service application.

¾

Protocol

- The protocol used for this application, either

TCP

,

UDP

, or

All

(all protocols

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supported by the Router).

¾

Status

- The status of this entry, "Enabled" means the virtual server entry is enabled.

¾

Common Service Port

- Some common services already exist in the drop-down list.

¾

Modify

- To modify or delete an existing entry.

To set up a virtual server entry:

1.

Click the

Add New...

button. (pop-up

Figure 4-52)

2.

Select the service you want to use from the

Common Service Port

list. If the

Common

Service Port

menu does not list the service that you want to use, enter the number of the

service port or service port range in the

Service Port

field.

3.

Enter the IP address of the computer running the service application in the

IP Address

field.

4.

Select the protocol used for this application in the

Protocol

drop-down list, either

TCP

,

UDP

,

or

All

.

5.

Select the

Enabled

option in the

Status

drop-down list.

6.

Click the

Save

button.

Figure 4-52

Add or Modify a Virtual Server Entry

)

Note:

It is possible that you have a computer or server that has more than one type of available service.

If so, select another service, and type the same IP address for that computer or server.

To modify or delete an existing entry:

1.

Find the desired entry in the table.

2.

Click

Modify

or

Delete

as desired on the

Modify

column.

Click the

Enable/ Disabled All

button to make all entries enabled/ disabled.

Click the

Delete All

button to delete all entries.

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300Mbps Multi-Function Wireless N Router

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Click the

previous page.

)

Note:

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

System Tools –> Remote Management

page to be any other value except 80 such as 8080.

Otherwise there will be a conflict to disable the virtual server.

4.10.2 Port Triggering

Choose menu “

Forwarding

→

Port Triggering

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

screen (shown in Figure 4-53). Some applications require multiple connections, like Internet

games, video conferencing, Internet telephoning and so on. Port Triggering is used for some of

these applications that cannot work with a pure NAT Router.

Figure 4-53

Port Triggering

To add a new rule, follow the steps below.

1.

Click the

Add New…

button, the next screen will pop-up as shown in Figure 4-54.

2.

Select a common application from the

Common Applications

drop-down list, then the

Trigger Port

field and the

Incoming Ports

field will be automatically filled. If the

Common

Applications

do not have the application you need, enter the

Trigger Port

and the

Incoming Ports

manually.

3.

Select the protocol used for Trigger Port from the

Trigger Protocol

drop-down list, either

TCP

,

UDP

, or

All

.

4.

Select the protocol used for Incoming Ports from the

Incoming Protocol

drop-down list,

either

TCP

or

UDP

, or

All.

5.

Select

Enable

in

Status

field.

6.

Click the

Save

button to save the new rule.

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300Mbps Multi-Function Wireless N Router

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Figure 4-54

Add or Modify a Triggering Entry

¾

Trigger Port

- The port for outgoing traffic. An outgoing connection using this port will trigger

this rule.

¾

Trigger Protocol

- The protocol used for Trigger Ports, either

TCP

,

UDP

, or

All

(all

protocols supported by the Router).

¾

Incoming Port

- The port or port range used by the remote system when it responds to the

outgoing request. A response using one of these ports will be forwarded to the PC which

triggered this rule. You can input at most 5 groups of ports (or port sections). Every group of

ports must be separated with ",", for example, 2000-2038, 2046, 2050-2051, 2085,

3010-3030.

¾

Incoming Protocol

- The protocol used for

Incoming Port

, either

TCP

,

UDP

, or

ALL

(all

protocols supported by the Router).

¾

Status

- The status of this entry, Enabled means the Port Triggering entry is enabled.

¾

Modify

- To modify or delete an existing entry.

¾

Common Applications

- Some popular applications already listed in the drop-down list of

Incoming Protocol

.

To modify or delete an existing entry:

5.

Find the desired entry in the table.

6.

Click

Modify

or

Delete

as desired on the

Modify

column.

Click the

Enable All

button to make all entries enabled.

Click the

Disabled All

button to make all entries disabled.

Click the

Delete All

button to delete all entries

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Once the Router is configured, the operation is as follows:

1.

A local host makes an outgoing connection to an external host using a destination port

number defined in the

Trigger Port

field.

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.

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.

)

Note:

1.

When the trigger connection is released, the corresponding opened ports will be closed.

2.

Each rule can only be used by one host on the LAN at a time. The trigger connection of other

hosts on the LAN will be refused.

3.

Incoming Ports

ranges cannot overlap each other.

4.10.3 DMZ

Choose menu “

Forwarding

→

DMZ

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

(shown in Figure 4-55).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. The Router forwards

packets of all services to the DMZ host. 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 be changed when using the DHCP function.

Figure 4-55

DMZ

To assign a computer or server to be a DMZ server:

1. Click the

Enable

button.

2.

Enter the IP address of a local PC that is set to be DMZ host in the

DMZ Host IP Address

field.

3. Click the

Save

button.

4.10.4 UPnP

Choose menu “

Forwarding

→

UPnP

”, and then you can view the information about

UPnP

in the

screen (shown in Figure 4-56). The

Universal Plug and Play (UPnP)

feature allows the devices,

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