Starting from the previous document  I'm going to describe a more complex configuration.
Basically I'm adding a certification authority (faked by a third oracle wallet) to sign the client and server X509 certificates.

I'm even introducing more complex DNs.

Recently I had to implement some more advanced security in my shop and I got very frustated trying to collect information from internet.
Googling around didn't help me too mutch and the official oracle documentation was sometimes vague.

So I decided to write down what I have down and why.