Setup VirtualBox to see Oracle on a Local guest

view story

http://serverfault.com – I have a Ubuntu machine and I have a Linux instance running in a Virtual-box on this machine. I need to connect to the oracle instance (through the oracle extension in php) . The extension is running. I am not sure about how to do the port forwarding and if I need to edit the host file. I read the manual, but still no luck. Any help is appreciated. Thanks (HowTos)