54Mbps Wireless Router Model KWGR614 Reference Manual

Advanced Configuration of the Router

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v1.2, September 2006

1.

Click

Add Service

.

2.

Enter a service name in the Service Name box.

3.

In the Service User box, selecting the default value of

Any

allows the service to be used by

everyone in your network. Otherwise, to restrict the service to a particular PC, select

Single

address

and enter the PC’s IP address.

4.

In the Service Type box, select between

TCP

(the default) and

UDP

.

5.

In the Triggering Port box, enter the outbound port number that the application will use.

6.

Set the parameters for the inbound connection—the connection type (TCP or UDP), the

starting port, and ending port numbers.

7.

Click

Apply

to save your changes.

Figure 5-2

Note:

For the information required for steps 4-6 above, refer to the game or

applications manual or support website.

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Advanced Configuration of the Router

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Configuring for Port Forwarding to Local Servers

Although the router causes your entire local network to appear as a single machine to the Internet,

you can make a local server (for example, a Web server or game server) visible and available to the

Internet. This is done using the Port Forwarding menu. From the Main Menu of the browser

interface, under Advanced, click on Port Forwarding to view the port forwarding menu, shown

below.

.

Use the Port Forwarding menu to configure the router to forward incoming protocols to computers

on your local network. In addition to servers for specific applications, you can also specify a

Default DMZ Server to which all other incoming protocols are forwarded. The DMZ Server is

configured in the Security Menu.

Before starting, you need to determine which type of service, application or game you will provide

and the IP address of the computer that will provide each service. Be sure the computer’s IP

address never changes. To configure port forwarding to a local server:

Figure 5-3

Note:

If you are unfamiliar with networking and routing, refer to

“Internet Networking

and TCP/IP Addressing” in Appendix B

, to become more familiar with the terms

and procedures used in this manual.

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1.

From the Service & Game box, select the service or game that you will host on your network.

If the service does not appear in the list, refer to the following section, “

Adding a Custom

Service

”.

2.

Enter the IP address of the local server in the corresponding Server IP Address box.

3.

Click the

Add

button.

Adding a Custom Service

To define a service, game or application that does not appear in the Services & Games list, you

must determine what port numbers are used by the service. For this information, you may need to

contact the manufacturer of the program that you wish to use. When you have the port number

information, follow these steps:

1.

If port forwarding services are already configured, make a note of the Start Port and the End

Port used by each service.

2.

Click the

Add Custom Service

button.

3.

In the Service Name box, type a name.

4.

Enter an unused port number in the Starting Port box.

Note:

To assure that the same computer always has the same IP address, use the reserved

IP address feature of your 54Mpbs Wireless Router. See

“Using Address

Reservation” on page 5-11

for instructions on how to use reserved IP addresses.

Figure 5-4

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Advanced Configuration of the Router

v1.2, September 2006

5.

To forward only one port, enter it again in the Ending Port box. To specify a range of ports,

enter the last port to be forwarded in the Ending Port box, making sure that the range of ports

being forwarded does not overlap with any currently configured services.

6.

Enter the IP address of the local server in the corresponding Server IP Address box.

7.

Click

Apply

at the bottom of the menu.

Editing or Deleting a Port Forwarding Entry

To edit or delete a Port Forwarding entry, follow these steps.

1.

In the table, select the button next to the service name.

2.

Click Edit or Delete.

Local Web and FTP Server Example

If a local computer with a private IP address of 192.168.1.33 acts as a Web and FTP server,

configure the Ports menu to forward HTTP (port 80) and FTP (ports 20 and 21) to local address

192.168.1.33.

To access this server from the Internet, the remote user must know the IP address that has been

assigned by your ISP. If this address is 172.16.1.23, for example, an Internet user can access your

Web server by directing the browser to http://172.16.1.23. The assigned IP address can be found in

the Router Status Menu, where it is shown as the WAN IP Address.

Some considerations for this application are:

•

If your account’s IP address is assigned dynamically by your ISP, the IP address may change

periodically as the DHCP lease expires.

•

If the IP address of the local computer is assigned by DHCP, it may change when the computer

is rebooted. To avoid this, you can manually configure the computer to use a fixed address.

•

Local computers must access the local server using the computers’ local LAN address

(192.168.1.33 in this example). Attempts by local computers to access the server using the

external IP address (172.16.1.23 in this example) will fail.

Multiple Computers for Internet Game Example

To set up an additional computer to play an Internet game:

1.

Select the game again from the Services/Games list.

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2.

Change the beginning port number in the Start Port box.

For these games, use the supplied number in the default listing and add +1 for each additional

computer. For example, if you've already configured one computer to play Hexen II (using

port 26900), the second computer's port number would be 26901, and the third computer

would be 26902.

3.

Type the same port number in the End Port box that you typed in the Start Port box.

4.

Type the IP address of the additional computer in the Server IP Address box.

5.

Click Apply.

Some online games and videoconferencing applications are incompatible with NAT. The 54Mpbs

Wireless Router is programmed to recognize some of these applications and to work properly with

them, but there are other applications that may not function well. In some cases, one local

computer can run the application properly if that computer’s IP address is entered as the default in

the Ports Menu. If one local computer acts as a game or videoconferencing host, enter its IP

address as the default.

Configuring the WAN Setup Options

The WAN Setup options let you configure a DMZ server, change the MTU size and enable the

wireless router to respond to a Ping on the WAN port. These options are discussed below.

Setting Up a Default DMZ Server

The default DMZ server feature is helpful when using some online games and videoconferencing

applications that are incompatible with NAT. The router is programmed to recognize some of these

applications and to work properly with them, but there are other applications that may not function

well. In some cases, one local computer can run the application properly if that computer’s IP

address is entered as the default DMZ server.

Incoming traffic from the Internet is normally discarded by the router unless the traffic is a

response to one of your local computers or a service that you have configured in the Ports menu.

Instead of discarding traffic for services you have not defined, you can have it forwarded to one

computer on your network. This computer is called the Default DMZ Server.

Note:

DMZ servers pose a security risk. A computer designated as the default DMZ

server loses much of the protection of the firewall, and is exposed to exploits from

the Internet. If compromised, the DMZ server can be used to attack your network.