Oracle 9i Client network port restriction

[cybtech]

Hi everybody,

Here's my question:

We have two servers here that need to communicate with eachother.
One is the application server and the other is the database server. As we need a good security on those machines (they are both in a DMZ that meens reachable by the internet) i need to restrict the network ports that is used by the Oracle Client. I already found a way to restrict the port on the oracle server side using "USE_SHARED_SOCKET" in the registry but the client keeps using whatever port it find...

So here's my question : Is there, by any chance, a way to restrict or to specify the network ports the Client will use to connect to the Oracle Server?

All the solutions i found so far worked only one way (Oracle Sever to the Oracle Client) but i didn't find anything to do the same the otherway.

Does it ring any bell to anyone out here?

Thank's in advance.