I have a VirtualBox machine running Ubuntu 18.04.2. I have installed OpenSSH on it.
In the Settings of the Virtual Machine I have set up this port forwarding rule:
Host IP: 127.0.0.1
Host Port: 2222
Guest IP: 10.0.2.15
Guest Port: 22
The SSH command I run in my local terminal is:
ssh firstname.lastname@example.org -p2222
It then asks me for the password, which I enter, and I get this error:
Permission denied, please try again.
The username and password are the ones I created when setting up Ubuntu.