You could use shared servers and explicit list the dispatcher port numbers. There also used to be a registry key USE_SHARED_SOCKET to limit the port number to the listener port number, but this key must be set on the oracle server, not the client. Regards, Freek D'Hooge Uptime Oracle Database Administrator email: freek.dhooge@xxxxxxxxx tel +32(0)3 451 23 82 http://www.uptime.be disclaimer ________________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Jose Manuel Quesada Sent: dinsdag 17 juni 2008 13:51 To: oracle-l@xxxxxxxxxxxxx Subject: Oracle client - Port number I am connecting to an Oracle instance through a Oracle 10G client in a Windows box. Is it possible to choose the client's port number or limit the port number range not to be so wide (ie, from 4500 to 5000)? Thanks -- //www.freelists.org/webpage/oracle-l