When you register events, IB server will establish new connection to client
to be able to deliver these events. For this new connection _new_ port is used.
There is no way (I think) how to predict/restrict port number (range of numbers)
that will be used, so you need to enable all port numbers for communication
between client and server.


Ivan
prenosil@...
http://www.volny.cz/iprenosil/interbase