this subject was covered today on comp.databases.oracle.server.
On Wed, 15 Dec 2004 17:55:28 -0800 (PST), dba1 mcc <mccdba1@(protected):
> I tried to access our ORACLE server through VPN. The
> problem I have is "sqlplus" not work, but tnsping
> work. Network engineer told me he did open port 1521
> for me.
> if I use ORACLE "tnsping" on PC side, it will response
> back. Server side have message "15-DEC-2004 20:36:38
> * ping * 0" on listener.ora file.
> If I use "sqlplus" on PC, there is message pop-up:
: TNS: Operation time out
> there is NO message on ORACLE server side listener.ora
> Anyone know why?