VPS securing tasks for admin ?
I am looking into gettin a VPS to run an online app in Ruby on rails (ROR).
I will be using beyond ROR,
Possibly Mongrel - a Ruby on Rails optimized WebServer
And an pop, smtp server for e-mail
Since I do not have experience securing Linux machines and services, and I am looking into getting someone with mopre experience to do it for me, what tasks should I make sure are done to secure the VPS ? This is fo my follow up purposes.
My ultimate goal is to have an e-commerce app and with credit card payment capability (using Paypal or a gateway of sorts)- by the way I am not storing any CC numbers on my server or anything like that...
I know most people know little abour ROR but besides that, what would you make sure you secure on the server and for each service.