What is port 1830 used for? Where does it need to be open. What "machine/service" initiates the connection and what machine/service is the target. I've got folks working on a firewall request and I must have missed 1830. How does the use of port 1830 differ from port 4889 -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Elliott, Patrick Sent: Thursday, May 10, 2007 11:41 AM To: mccdba1@xxxxxxxxx; oracle-l@xxxxxxxxxxxxx Subject: RE: Grid control agent can NOT upload data to OMS server through firewall You need to open ports 3872, 1159, 1830, and 4889 1159 is needed if you are doing secure communication. Pat -- //www.freelists.org/webpage/oracle-l