Internet Features

43

Figure 28: Special Applications Screen

Data - Special Applications Screen

Checkbox

Use this to Enable or Disable this Special Application as required.

Name

Enter a descriptive name to identify this Special Application.

Incoming

Ports

•

Type

- Select the protocol (TCP or UDP) used when you receive data

from the special application or service. (Note: Some applications use

different protocols for outgoing and incoming data).

•

Start

- Enter the beginning of the range of port numbers used by the

application server, for data you receive. If the application uses a single

port number, enter it in both the "Start" and "Finish" fields.

•

Finish

- Enter the end of the range of port numbers used by the applica-

tion server, for data you receive.

Outgoing

Ports

•

Type

- Select the protocol (TCP or UDP) used when you send data to

the remote system or service.

•

Start

- Enter the beginning of the range of port numbers used by the

application server, for data you send to it. If the application uses a sin-

gle port number, enter it in both the "Start" and "Finish" fields.

•

Finish

- Enter the end of the range of port numbers used by the applica-

tion server, for data you send to it. If the application uses a single port

number, enter it in both the "Start" and "Finish" fields.

Using a Special Application

•

Configure the

Special Applications

screen as required.

•

On your PC, use the application normally. Remember that only one (1) PC can use each

Special application at any time. Also, when 1 PC is finished using a particular Special Ap-

plication, there may need to be a "Time-out" before another PC can use the same Special

Application. The "Time-out" period may be up to 3 minutes.

TW100-BRV304 User Guide

44

DMZ

This feature, if enabled, allows one (1) computer on your LAN to be exposed to all users on

the Internet, allowing unrestricted 2-way communication between the "DMZ PC" and other

Internet users or Servers.

•

This allows almost any application to be used on the "DMZ PC".

•

The "DMZ PC" will receive all "Unknown" connections and data.

•

If the DMZ feature is enabled, you must select the PC to be used as the "DMZ PC".

•

The DMZ feature can be Enabled and Disabled on the

Advanced Internet

screen.

URL Filter

The URL Filter allows you to block access to undesirable Web site

•

To use this feature, you must define "filter strings". If the "filter string" appears in a

requested URL, the request is blocked.

•

Enabling the

URL Filter

also affects the Internet

Access Log

. If Enabled, the "Destination"

field in the log will display the URL. Otherwise, it will display the IP Address.

•

The

URL Filter

can be Enabled or Disabled on the

Advanced Internet

screen.

Internet Features

45

URL Filter Screen

Click the "Configure URL Filter" button on the

Advanced

Internet

screen to access the

URL

Filter

screen. An example screen is shown below.

Figure 29: URL Filter Screen

Data - URL Filter Screen

Current Entries

This lists any existing entries. If you have not entered any values, this

list will be empty.

Add Filter String

To add an entry to the list, enter it here, and click the "Add" button.

An entry may be a Domain name (e.g. www.trash.com) or simply a

string. (e.g. ads/ )

Any URL which contains ANY entry ANYWHERE in the URL will

be blocked.

Delete/Delete All

Use these buttons to delete the selected entry or all entries, as required.

Multiple entries can be selected by holding down the CTRL key while

selecting. (On the Macintosh, hold the SHIFT key while selecting.)

Add

Use this to add the current Filter String to the site list.

TW100-BRV304 User Guide

46

Dynamic DNS (Domain Name Server)

This free service is very useful when combined with the

Virtual Server

feature. It allows

Internet users to connect to your Virtual Servers using a URL, rather than an IP Address.

This also solves the problem of having a dynamic IP address. With a dynamic IP address, your

IP address may change whenever you connect, which makes it difficult to connect to you.

The Service works as follows:

1.

You must register for the service at http://www.dyndns.org (Registration is free). Your

password will be E-mailed to you.

2.

After registration, use the "Create New Host" option (at www.dyndns.org) to request your

desired Domain name.

3.

Enter your data from www.dyndns.org in the TW100-BRV304 's DDNS screen.

4.

The TW100-BRV304 will then automatically ensure that your current IP Address is

recorded at http://www.dyndns.org

5.

From the Internet, users will be able to connect to your Virtual Servers (or DMZ PC)

using your Domain name, as shown on this screen.

Dynamic DNS Screen

Select

Internet

on the main menu, then

Dynamic DNS

, to see a screen like the following:

Figure 30: DDNS Screen

Data - Dynamic DNS Screen

DDNS Service

•

You must sign up first to create a new account before using the

service. The service is free.

•

Click this link to connect to the www.dyndns.org Web site.

•

Your initial password will be E-mailed to you; you can change

this later if you wish.

•

After registration, use the "Create New Host" link (on the

www.dyndns.org Web site) to request a domain name.

Internet Features

47

User Name

Enter the "User name" specified at the www.dyndns.org Web site

when you registered.

Password

Enter your current password for www.dyndns.org

Domain Name

•

Enter your domain name, as allocated at www.dyndns.org.

•

The name should consist only of letters and the hyphen (dash).

Using any other characters may cause problems..

DDNS Status

This message is returned by the DDNS Server at www.dyndns.org

•

Normally, this message should be "Update successful" (current

IP address was updated on the www.dyndns.org server).

•

If the message is "No host", this indicates the host name entered

was not allocated to you. You need to connect to

www.dyndns.org and correct this problem.