If you want to buy a VPS, (virtual private server), suddenly a new world full of possibilities will open up to you. But also, without knowing it, you will enter a new world of security threats. If you have become accustomed to most of the security issues being resolved by the hosting provider (in the case of shared hosting), you will now need to learn some basic security methods of a VPS.
1) Protect your login – This means using secure passwords, limiting SSH access and prohibiting login as root (only one user should have root status and no one should be able to log in directly. as root).
2) Add extra layers of protection – This means network firewalls, application firewalls, brute-force prevention measures and any other form of protection. Allow yourself time to research the various preventive measures you can take.
3) Monitor everything – A VPS administrator must be proactive. Do not wait until the hosting provider contacts you to tell you that a problem has arisen.
4) Backup – Regularly backup to your server and be prepared for the worst. Also, test your backups to make sure they are restored without any problems.
5) Vulnerability testing – Start with a rootkit checker and test to find out as many types of vulnerabilities as possible.