Lessons learned from document #1

This is the first approach to look at the requirements coming from the first document.

So far we have identified the following requirements:

1. Some applications need high-throughput data channels; firewalls must be able to cope with large amount of data traffic.
2. Some applications use only a set of well-known ports.
3. Some applications use a set of well-known ports and a set of detectable dynamic ports. Detectable means that through analysis of the traffic between the server and the client it is possible to determine which dynamic ports will be used by the applications.
4. Some application use a set of well-known ports and a set of obscured (non detectable) dynamic ports. Obscured means that the analysis of the traffic between the server and the client does not provide enough information to determine which dynamic ports will be used by the applications. This may happen because the traffic is encrypted or because the necessary information is not exchanged at all between the server and the client.