TP-Link TL-WR840N Router Manual PDF (Setup & Configuration Guide)

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TL-WR840N

300Mbps Wireless N Router User Guide

- 42 -

4.7.3 Address Reservation

Choose menu “

DHCP

→

Address Reservation

”, you can view and add a reserved address for

clients via the next screen (shown in Figure 4-28).When you specify a reserved IP address for a

PC on the LAN, that PC will always receive the same IP address each time when it accesses the

DHCP server. Reserved IP addresses should be assigned to the servers that require permanent

IP settings.

Figure 4-28

Address Reservation



MAC Address -

The MAC address of the PC for which you want to reserve an IP address.



Reserved IP Address -

The IP address reserved for the PC by the Router.



Status

-

The status of this entry, either

Enabled

or

Disabled

.

To Reserve an IP address:

1.

Click the

Add New…

button. Then Figure 4-29 will pop up.

2.

Enter the MAC address (in XX-XX-XX-XX-XX-XX format.) and IP address (in dotted-decimal

notation) of the computer for which you want to reserve an IP address.

3.

Click the

Save

button.

Figure 4-29

Add or Modify an Address Reservation Entry

To modify or delete an existing entry:

1.

Click the

Modify

in the entry you want to modify. If you want to delete the entry, click the

Delete

.

2.

Modify the information.

3.

Click the

Save

button.

Click the

Enable/Disable All

button to make all entries enabled/disabled

Click the

Delete All

button to delete all entries.

Click the

page.

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TL-WR840N

300Mbps Wireless N Router User Guide

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4.8 Forwarding

Figure 4-30 The Forwarding menu

There are four submenus under the Forwarding menu (shown in Figure 4-30),

Virtual Servers

,

Port Triggering

,

DMZ

and

UPnP

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

corresponding function.

4.8.1 Virtual Servers

Choose menu “

Forwarding

→

Virtual Servers

”, you can view and add virtual servers in the

screen as shown in Figure 4-31. 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 be changed when using the DHCP function.

Figure 4-31

Virtual Servers



Service Port -

The numbers of External Ports. You can type a service port or a range of

service ports (in XXX – YYY format, XXX is the start port number, YYY is the end port

number).



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.



IP Address -

The IP Address of the PC providing the service application.



Protocol -

The protocol used for this application, either

TCP

,

UDP

, or

All

(all protocols

supported by the Router).



Status -

The status of this entry, either

Enabled

or

Disabled

.

To set up a virtual server entry:

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1.

Click the

Add New…

button, the next screen will pop-up as shown in Figure 4-32.

2.

Select the service port you want to use from the

Common Service Port

list. If the

Common

Service Port

list does not have the service that you want to use, type the service port

number or service port range in the

Service Port

box.

3.

Type the IP Address of the computer in the

IP Address

box.

4.

Select the protocol used for this application, either

TCP

,

UDP

, or

All

.

5.

Select the

Enable

to enable the virtual server.

6.

Click the

Save

button.

Figure 4-32

Add or Modify a Virtual Server Entry



Note:

If your computer or server has more than one type of available service, please select another

service, and enter the same IP Address for that computer or server.

To modify or delete an existing entry:

1.

Click the

Modify

in the entry you want to modify. If you want to delete the entry, click the

Delete

.

2.

Modify the information.

3.

Click the

Save

button.

Click the

Enable/Disable All

button to make all entries enabled/disabled.

Click the

Delete All

button to delete all entries.

Click the

page.



Note:

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

“

Security

→

Remote Management

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

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

4.8.2 Port Triggering

Choose menu “

Forwarding

→

Port Triggering

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

as shown in Figure 4-33. Some applications require multiple connections, like Internet games, video

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300Mbps Wireless N Router User Guide

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conferencing, Internet calling and so on. These applications cannot work with a pure NAT Router.

Port Triggering is used for some of these applications that can work with an NAT Router.

Figure 4-33

Port Triggering

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

1. A local host makes an outgoing connection 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.



Trigger Port -

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

this rule.



Trigger Protocol -

The protocol used for Trigger Ports, either

TCP

,

UDP

, or

All

(all

protocols supported by the Router).



Incoming Ports -

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 that

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

ports must be set apart with ",". For example, 2000-2038, 2050-2051, 2085, 3010-3030.



Incoming Protocol -

The protocol used for Incoming Ports Range, either

TCP

or

UDP

, or

ALL

(all protocols supported by the Router).



Status -

The status of this entry, either

Enabled

or

Disabled

.

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 4-34.

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.

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TL-WR840N

300Mbps Wireless N Router User Guide

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5.

Select

Enable

in

Status

field.

6.

Click the

Save

button to save the new rule.

Figure 4-34

Add or Modify a Port Triggering Entry

To modify or delete an existing entry:

1.

Click the

Modify

in the entry you want to modify. If you want to delete the entry, click the

Delete

.

2.

Modify the information.

3.

Click the

Save

button.

Click the

Enable All

button to make all entries enabled

Click the

Disable All

button to make all entries disabled.

Click the

Delete All

button to delete all entries



Note:

1.

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

2.

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

connection of other hosts on LAN will be refused.

3.

Incoming Ports cannot overlap each other.

4.8.3 DMZ

Choose menu “

Forwarding

→

DMZ

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

shown in Figure 4-35. 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 be changed when using the DHCP function.

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