I have a database "TEST", to which I connect at address 123.45.67.89:1521.
How do I connect to it using PL/SQL Developer?
In the "database" section of the logon dialog box, enter //hostname.domain:port/database
, in your case //123.45.67.89:1521/TEST
- this assumes that you don't want to set up a tnsnames.ora
file/entry for some reason.
Also make sure the firewall settings on your server are not blocking port 1521
.