Lets see an example of making a Real Server (media streaming) accessible to the NET:
In the above example we chose IN as the direction of the connection allowing the server to be accessible from the Net. We chose TCP as the connection protocol. Port 7070 is the standard RealServer port connection. 192.168.0.2 is the IP number of the server in the LAN, which houses or will house the RealServer.
In the example below we create a rule to run a Web server (port 80) in the 192.168.0.7 machine: