Database Connection Filtering

Hi,

I would like to have database clients talk to the database through a "ghost" database like this:

            |---------|           |----------| 
 -----------|Ghost    |-----------|Oracle 8i |
  Outside   |database | Internal  |          |
  Network   |         | Network   |          |
 -----------|         |-----------|          |
            |---------|           |----------|

The ghost would do things like examine the connection request and ensure that the name in the connect string is bound (somehow) to the source of the request. If everything is ok it would forward the connection request to the actual database and then just act as a proxy for the remainder of the connection.

Is something like this possible given the multitude of driver setups?

I would like to think that all interactions with the database boil down to sql statements in ascii (or some public encoding scheme) coming across one of the listener ports. Is this a correct guess, or are things more complicated than that?

Thanks.

BT

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