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Page 46 / 123 Scroll up to view Page 41 - 45
Internet Features
43
Communication Applications
Most applications are supported transparently by the TW100-BRV204. But sometimes it is not
clear which PC should receive an incoming connection. This problem could arise with the
Communication Applications
listed on this screen.
If this problem arises, you can use this screen to set which PC should receive an incoming
connection, as described below.
Select an Application
This lists applications which may generate incoming connections,
where the destination PC (on your local LAN) is unknown.
Send incoming calls to
This lists the PCs on your LAN.
•
If necessary, you can add PCs manually, using the "PC
Database" option on the advanced menu.
•
For each application listed above, you can choose a destina-
tion PC.
•
There is no need to "Save" after each change; you can set the
destination PC for each application, then click "Save".
Special Applications
If you use Internet applications which use non-standard connections or port numbers, you may
find that they do not function correctly because they are blocked by the TW100-BRV204 's
firewall. In this case, you can define the application as a "Special Application".
Special Applications Screen
This screen can be reached by clicking the
Special Applications
button on the
Advanced
Internet
screen.
You can then define your Special Applications. You will need detailed information about the
application; this is normally available from the supplier of the application.
Also, note that the terms "Incoming" and "Outgoing" on this screen refer to traffic from the
client (PC) viewpoint
Page 47 / 123
TW100-BRV204 User Guide
44
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.
Page 48 / 123
Internet Features
45
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.
Page 49 / 123
TW100-BRV204 User Guide
46
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.
Page 50 / 123
Internet Features
47
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-BRV204 's DDNS screen.
4.
The TW100-BRV204 will then automatically ensure that your current IP Address is
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.

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