Reference Manual for the Broadband Voice Adapter TA612V

Advanced Configuration

6-3

202-10037-01, March 2005

Follow these steps to set up a computer to play Internet games or use Internet applications:

1.

Click

Add

.

Figure 6-2:

Add Port Trigger Menu

2.

Enter a service name in the Service Name box.

3.

Enter the outbound start and final port numbers.

4.

Enter the inbound start and final port numbers. These port numbers can be obtained from the

game or applications manual or support Web site.

5.

Click

Apply

to save your changes.

Configuring 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

Reference Manual for the Broadband Voice Adapter TA612V

6-4

Advanced Configuration

202-10037-01, March 2005

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

below.

Figure 6-3:

Port Forwarding Menu

.

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'll need to determine which type of service, application or game you'll 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:

1.

From the Service Name 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 Port

Forwarding Custom Service

”.

2.

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

Note:

If you are unfamiliar with networking and routing, refer to

Appendix B,

“Network and Routing Basics

,” to become more familiar with the terms and procedures

used in this manual.

Note:

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

IP address feature of your TA612V adapter. See

“Using Address Reservation” on

page 6-11

for instructions on how to use reserved IP addresses.

Reference Manual for the Broadband Voice Adapter TA612V

Advanced Configuration

6-5

202-10037-01, March 2005

3.

Click the Add button.

Adding a Port Forwarding Custom Service

To define a service, game or application that does not appear in the Service Name 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.

Click

Add Custom Service

.

2.

Enter the first port number in an unused Starting Port box.

3.

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 End Port box.

4.

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

5.

Type a name for the service.

6.

Click

Apply

to save your settings.

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 192.168.61.33 acts as a web and FTP server,

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

192.168.61.33

In order for a remote user 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 Maintenance Status Menu, where it is shown as the WAN IP Address.

Reference Manual for the Broadband Voice Adapter TA612V

6-6

Advanced Configuration

202-10037-01, March 2005

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

(192.168.61.33 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 Half Life, KALI or Quake III Example

To set up an additional computer to play Half Life, KALI or Quake III:

1.

Click the button of an unused port in the table.

2.

Select the game again from the Service Name list.

3.

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.

4.

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

5.

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

6.

Click

Apply

to save your changes.

Some online games and videoconferencing applications are incompatible with NAT. The TA612V

adapter 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 WAN Setup Options

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

broadband voice adapter to respond to a Ping on the WAN port. These options are discussed below.

Reference Manual for the Broadband Voice Adapter TA612V

Advanced Configuration

6-7

202-10037-01, March 2005

Figure 6-4:

WAN Setup menu.

•

Connect Automatically, as Required

Normally, this option should be Enabled, so that an Internet connection will be made

automatically, whenever Internet-bound traffic is detected. In locations where Internet access

is billed by the minute, if this causes high connection costs, you can disable this setting.

If disabled, you must connect manually, using the sub-screen accessed from the Router Status

menu “Show WAN Status” screen.

•

Disable SPI Firewall

Normally, this option should be Enabled, so that your local network will be protected by the

Stateful Packet Inspection (SPI) firewall included in the TA612V. However, certain

communications functions like VPN may require turning off the SPI feature.

•

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.