How to Reverse Proxy

Hi and Hello,
I was wondering if some one would be willing to give a example of how to create a reverse proxy to a service hosted on other machine.
For example: =>
Now at this time anyone would be pointing to: Excelent guide. Or to google it there are plent out there.
This is all true unfortunately I am using it on Directadmin and am stuck in limbo (DirectAdmin refuses to comply to openlitespeed setup and thus webgui is locked down for changes) While I wait for the DA to get its shit to gether I was hoping some one could provide me with a extensive or even just example files so i can atleast get this working.