I am conneting to oracle server via vpn, i have sqlnet.ora and tnsnames.ora files exactly how i was instructed by the network deptment. But i can receiving this ORA-12541 error when i try to run my .net app. The hostname and service name in tnsnames.ora are same as everyone else is using. So i am confused why it is not working for me. I have installed only oracle client on my machine.
I am not sure if i have to start some service on my machine, if so where would it be, it's name etc. Do i have to open port 1521 on my side?
Either the tnsname files they gave me are wrong or something else is wrong on my machine.