Security VPS Server Help!

Yeah 80-90% would be ensuring CSF Firewall and it's LFD service are running and working. But there's plenty of Google results to search for and read up on. There's a sliding scale of security and harden steps to take from extreme to basic (i.e. selinux and password policy tightening to force password changes every XX days and be of certain character lengths and mix of number, letters and symbols). But a tool or software or security action is only as good as the person using it. So if you don't know what you're doing you could make it worse or end up opening up holes into your system.

Centmin Mod is provided as is so, anything beyond Centmin Mod defaults would be up to end user to figure out. Of course forum members and Centmin Mod users here are free to share their tips and experiences etc.

CSF Firewall official page for Centmin Mod and provided links on that page are worth time reading and getting your head around them though. CSF Firewall is the first line of defense and a must have on any server/vps server

Other tools available are Maldet + Clamav (step 12 in Getting Started Guide) and ensuring some form of yum-cron auto update is setup.