So, you can not run firewall cause of virtualization ? Seriously?
This vps is from a reputable VPS provider around here, I won't name em though. I was working for a client this morning, and while installing CSF, I faced couple of error (OVZ so the node is missing required modules), so I asked the client to open a ticket and ask them if they can enable those.
This is there reply
"Unfortunately due the virtualization layer it is not possible to run firewall inside your virtual server. If you want to use some firewall rules please send them to us in "iptables" format and we will implement then in the main firewall for you immediately."
Time is good and also bad. Life is short and that is sad. Dont worry be happy thats my style. No matter what happens i won't lose my smile!