My setup is:

An Oracle 9.2.0.1.0 Enterprise Edition Win2K DB server with ConnMgr
installed and running. The DB looks fine and I can connect via SQL*Plus
from the same machine.

From another machine on the same Gigabit Ethernet switch, I can't connect.
Gives an ORA-12564 connection refused error.

As I recall from a previous Oracle setup, an addition entry needs to be made
in the tnsnames.ora file for the net service on each of the computers.
Something like this:
DBASE =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS=(PROTOCOL=TCP)(HOST = host_name1)(PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST = host_name2)(PORT=1630))
)
(CONNECT_DATA =
(SERVER=DEDICATED)
(SERVICE_NAME=dbase)
)
)

How exactly do I need to do this on the server and client machines?

Thanks tons for the help...

Dave Penn