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Using the Forwarding Option

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.

d. Click

Apply

.

e. Test your local host or application such as your Xbox to see if it is functioning

properly. Continue with port forwarding if the host or application is not

communicating correctly.

2. Assign a Static IP lease to the client/host to which you are setting up forwarding. This

way, the IP does not change and disrupt your forwarding rules. For example, if you are

hosting a Web server in your internal network, and you wish to setup a forwarding rule

for it, assign a static IP lease to that system to keep the IP from renewing and

disrupting the forwarding rule.

6.5.2

Setting Up Forwarding

If the suggestions in

Before Setting Up Forwarding on page 46

did not correct your

communication problem, use port forwarding.

You need the following information to set up port forwarding:



IP address

of each local host system (for example, Xbox) for which you need to setup

a port forwarding rule.



Port numbers

the local host’s application listens to for incoming requests/data (for

example, a game or other service). These port numbers should be available in the

documentation associated with the application.

Note

For detailed information on port forwarding, including how to set it up for specific

applications using specific network devices (for example, cable modems), refer to:

http://portforward.com

or consult your host device or application user manual.

Steps

To set up forwarding:

1.

Access the Web interface of the DVW326, see

Accessing the Web User Interface

Locally on page 18

.

2. Click

Advanced

from the main menu.

3. Click

Forwarding

from the left menu.

4. Click

Create IPv4

.

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5. Enter information in the forwarding fields as shown in the screen shot below. Field

descriptions follow.

Label

Description

Local IP

Defines the IP address of the local LAN device to which the

forwarding rule applies. For example, an Xbox or PC.

Local Start Port

Defines the starting port number listened to by the server host

located in your LAN.

Local End Port

Defines the ending port number listened to by the server host

located in your LAN.

External IP

Designates the IP address of another router on the network

through which to forward data.

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6. Click

Apply

. The forwarding rule is created and displayed in the table as shown

below. Additional field descriptions follow.

External Start Port

Defines the port number to start the range of ports to publish

to the Internet.

External End Port

Defines the port number to end the range of ports published to

Internet.

Note:

Be very careful with ranges. Ports within a range are not

usable by other applications that may require them. It is

common and safer to enter the same port number as the start

and end of the range.

Protocol

Selects the protocol type. Options are UDP, TCP, or BOTH.

Description

Names the forwarding rule.

Enabled

Disables (Off) or enables (On) the forwarding rule.

Cancel

Stops creating the forwarding rule and returns you to the

previous Forwarding screen.

Apply

Saves changes.

Port Map

Shows a list of common applications and their ports.

Forwarding Table

– Lists existing forwarding rules.

Remove All

Deletes all entries in the forwarding table.

Label

Description

Edit

Displays fields for the rule selected in order to change values.

Remove

Deletes the rule selected.

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Using the Forwarding Option

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6.5.3

Setting Up Forwarding for an Xbox Example

Following is an example of how you would set up a single Xbox running Modern

Warfare

2. Since multiple ports are used for the Xbox and the Modern Warfare 2 game, a

separate forwarding rule is set for each port. Multiple ports and forwarding rules may not

be required for other applications.

Steps

To set up port forwarding for an Xbox:

1.

Click

Advanced

from the main menu.

2. Click

Forwarding

from the left side menu.

3. Enter the Xbox IP address in the

Local IP

field.

4. Define ports used by the Xbox in the

Local Start Port

and

Local End Port

fields.

Define the same ports used by the Xbox in the

External Start Port

and

External End

Port

fields.

5. Create Port Forwarding rules per port. A rule set up for port 53 works for port 53. A

port can be used only by one program at a time.

Note

You can set up applications/services to listen on one internal port. External Internet

users who want to access that application, address it using an external port, such as

an Audio server. Internal Ports are the ports to which local servers listen. External

Ports are the ports that the DVW326 listens to from the WAN.

The following screen shot shows Forwarding set up for an Xbox.

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Using the Port Triggers Option

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6.6

Using the Port Triggers Option

Port Triggers

define dynamic triggers to specific devices on the LAN. This allows special

applications that require specific port numbers with bi-directional traffic to function

properly. Applications such as video conferencing, voice, gaming, and some messaging

program features may require these special settings.

Some services use a dedicated range of ports on the client side and a dedicated range of

ports on the server side. The difference between port forwarding and triggering is:



Port forwarding sets a rule to send a service to a single LAN IP address.



Port triggering defines two kinds of ports: trigger port and target port. The trigger

port sends a service request from a LAN host to a specific destination port number.

The port the LAN host is required to listen to by the application is called the target

port. The server returns responses to these ports.

For example:

1.

John requests a file from the Real Audio server (port 7070).

Port 7070 is a “trigger”

port and causes the device to record John’s computer IP address. The DVW326

associates John's computer IP address with the “target” port range of 6970-7170.

2. The Real Audio server responds to a port number ranging between 6970-7170.

3. The DVW326 forwards the traffic to John’s computer IP address.

4. Only John can connect to the Real Audio server until the connection is closed or

expires.

Steps

To set up port triggering:

1.

Click

Advanced

from the main menu.

2. Click

Port Triggers

from the left side menu.

3. Click

Create.