A bit on the technical aspects. Graphical requirements are minimal as is for the CPU, I guess somewhere around 1GHz should be OK, probably lower but I never tested any lower.
Memory should be plenty but since we're talking a server that shouldn't be a typical issue. I/O also should be sufficient but since it is a server directly hooked up up to the Internet that should be OK.
Last but not least the port settings and security. Iirc only one port needs to be open with this kind of install and that's not very risky. If the server supports opening a port app specific there should not be an issue.
I would need both RDP and FTP access to set things up. I had both once but not anymore.
