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Network adapter could not establish the connection on a Virtual Machine

Johnny_420Jan 24 2018 — edited Jan 25 2018

I am working in a small institution and is being requested to do all the DBA works that I have no experience with.

Please bear with me and give me some pointers.

I have a virtual machine installed on my machine with Oracle 12c installed on the VM.

On the VM, I am able to ping the production server and establish a database connection. However, doing it the other way returns negative results. I got ping timed out.(at the time of compiling this thread, the ping did not work. But it works now. Weird)

And when trying to establish a connection from the production server to the database on the virtual machine, I get network adapter error as you can see below.

Connection.png

Here are the untouched tnsnames and listener files.

listner.pngtnsnames.png

Is there any configuration/settings I need to set up?

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Locked on Feb 22 2018
Added on Jan 24 2018
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