How to connect to remote Oracle DB with PL/SQL Developer?

Question

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?

Answer 1

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.