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Configuring a Special Application

The supports the function to use a special application to configure dynamic port forwarding. Certain applications in the local area network (LAN) must use a specified port of the firewall to access remote applications. To set up a Transmission Control Protocol and User Datagram Protocol (TCP/UDP) connection between an application in the LAN and a remote application, the firewall uses this port forwarding function to open the required port.

Procedure

  1. Choose > > .
  2. Click and set the parameters.
  3. Click to save the settings.

    NOTE:
    • : to edit an item.
    • : to delete an item.

  4. Click for the settings to take effect.

Example of the Configuration of a Special Application

A client in the LAN uses TCP to access the MSN game server through port 47624. When the game starts, the game server uses TCP and port 2400 to set up a connection to the client that tries to access the server. In this case, you must configure dynamic port forwarding, because the game conflicts with the following default firewall rules:

  • The firewall blocks external data input.
  • The game server can send a connection request to the external IP address of the but cannot send the request to the LAN client that tries to access the game server, because the IP addresses of clients are not open to external devices.

To solve this problem, you must define a set of port forwarding rules. When the client in the LAN sends data to TCP port 47624, the rules allow data input from TCP port 2400. Then data from the game server can be received from and transmitted to the LAN client that sends data to TCP port 47624.

MSN Gaming Zone

47624

2400

NOTE:

For details about , , , and , contact your service provider.

Parent topic: Security Settings