These features provides additional capabilities relating to the use of Internet software, including using Servers on your LAN.
The Internet Application screen provides access to some advanced features of the ISDN Internet Router. Selecting the Internet Application tab will display a screen like the example below.
This feature is only required if you wish to use Internet applications which require 2-way communication, multiple connections, or combined TCP/UDP connections.
To use an existing entry:
To create a new entry:
Enable
|
Use this to Enable or Disable support for this application, as
required.
|
Name
|
Enter a descriptive name to identify this application entry.
|
Outgoing Data |
|
Protocol
|
The protocol (TCP or UDP) used when you connect to the special application
service.
|
Port Range:
Start |
The beginning of the range of port numbers used by the application server,
for data you send to it. If the application uses a single port number, enter it
in both the "Start" and "Finish" fields.
|
Port Range:
End |
The end of the range of port numbers used by the application server, for
data you send.
|
Incoming Data |
|
Protocol
|
The protocol (TCP or UDP) used when the application or service sends data
to you.
|
Port Range:
Start |
The beginning of the range of port numbers used by the application server
when data is sent to you. If the application uses a single port number, enter it
in both the "Start" and "Finish" fields.
|
Port Range:
End |
The end of the range of port numbers used by the application server, when
data is sent to you.
|
The Virtual Servers feature allows Internet users to access Servers on your LAN, via the ISDN Internet Router. This feature is available only if you are using the ISDN Internet Router for shared Internet access, rather than for LAN-to-LAN connection.
Normally, Internet users would not be able to access a server on your LAN because:
The "Virtual Server" feature solves these problems and allows Internet users to connect to your servers. However, your LAN must have an existing connection to the Internet. Internet users cannot open a connection.
Virtual Server operation is illustrated below.
Figure 19: Virtual Server Operation
Note that, in this illustration, both Internet users are connecting to the same IP Address, but using different protocols.
To Internet users, all virtual Servers on your LAN have the same IP Address.
This IP Address is the IP Address from ISP on the Quick Setup screen. This address should be static (fixed), rather than dynamic, to make it easier for Internet users to connect to your Servers.
If the type of Server you wish to use is not listed, you can define it by clicking the Add button. You will see a screen like the example below.
Figure 20: Virtual Server Setup
Data - Virtual Servers
Enable
|
Use this to Enable or Disable support for this Server, as required.
|
Protocol
|
Select the protocol (TCP or UDP) used by the Server.
|
Name
|
Names are case insensitive (case is ignored).
|
IP Address
|
The IP Address of the PC on your LAN which is running the Server software.
|
Internal Port Number
|
Enter the port number used by the Server to connect to clients.
|
External Port Number
|
The port number used by clients when connecting to the Server. This is
normally the same as the Internal Port Number.
If it is different, this device will perform a "mapping" or "translation" function, allowing you to configure the server to use one port address, while clients use a different port address |
The ISDN Internet Router supports VPN, using PPTP (Peer-to-peer Tunneling Protocol).
Once this is done, the ISDN Internet Router is transparent. Simply configure and use your VPN software as described in the software documentation.
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 "Exposed Computer" and other Internet users or Servers.
This allows connection to special-purpose servers which require proprietary client software, or 2-way user connections such as Video-conferencing, which requires both users to run special software.