I have just set up a 9i server on Win XP SP2 and I'm trying to connect to a
database via a 9i client also on WinXP SP2.

The server machine has XP Firewall switched on, port 1521 open. The client
machine has no firewall at the moment.

I can tnsping the server just fine from the client:

Used HOSTNAME adapter to resolve the alias
Attempting to contact
(DESCRIPTION=(CONNECT_DATA=(SID=*)(SERVICE_NAME=ca sablanca
))(ADDRESS=(PROTOCOL=TCP)(HOST=casablanca)(PORT=15 21)))
OK (10 msec)

but if I try to test the connection using the Net Configuration Assistant on
the client it fails. Switching off the firewall entirely on the server
causes it to work fine.

I can't understand why its not working with the firewall on, doesn't the
tnsping result show I have configured the firewall correctly?

TIA