I have 2 VM in azure one is a DB server and the other is a web server.
I can get remote desktop connection for both these servers and web server can connect to Database wih
sqlplus user/password@internal_network_ip:port/sid
But however I cannot connect to Cloud DB from my local system. I tried
sqlplus user/password@internal_ip:8552/sid
ORA-12170: TNS:Connect timeout occurred
sqlplus user/password@xxxx.something.net:8552/sid -- oracle port
ORA-12170: TNS:Connect timeout occurred
sqlplus user/password@xxxx.something.net:54955/sid -- port for cloud system used when taking remote desktop connection
ORA-12547: TNS:lost contact
sqlplus user/password@server_hostname:8552/sid
ORA-12154: TNS:could not resolve the connect identifier specified
However I cannot connect to the Database
Where am I going wrong?
You most likely need to open an endpoint on the cloud service into which your Oracle DB has been deployed. I would recommend you make the public port something other than the default Oracle port.
See the Azure documentation site for instructions on how to create endpoint.
来源：https://stackoverflow.com/questions/30591569/how-to-connect-to-azure-oracle-12c-database-using-sqlplus-or-sql-developer-cloud