I have a VPS with Ubuntu 12.10 server edition, an I connect to it from public/university. I host some web applications on it. I have always been concerned with security issues. What features is needed to be checked in order to have a secure VPS?
Implement the hardening techniques outlined in the CIS Benchmark guides for:
I would also run a vulnerability scanner such as Nessus against it to determine any additional security weaknesses that may exist.