VPS and VDS security: access, updates and backups
Protect a VPS with secure access, software updates and a firewall. Keep independent backups and test restoring your data.
Securing a virtual server requires several complementary measures. The provider maintains its infrastructure, but you still need to protect the operating system and application unless your service agreement includes that work. Start by assigning responsibility for updates, regular checks of user permissions, alerts and recovery.
Use maintained software from official sources and install security updates through a planned process. Remove unnecessary services and allow only required traffic through the firewall. Administrative interfaces should be reachable only by the people and systems that need them. Changing the SSH port alone is not a substitute for strong authentication.
For SSH access, use individual accounts and suitable keys, and grant administrative privileges only where needed. Test a new login method before disabling an existing one. Keep recovery-console access available. Do not delete the system account named root or change permissions on system directories without understanding the consequences.
Protect web traffic with HTTPS and keep passwords, keys and private application credentials out of files accessible through the website. Review authentication failures, unexpected processes and unusual resource consumption. Preserve useful logs for investigation instead of deleting evidence of a problem.
Create backups outside the server and test restoration. Decide how much data loss and downtime the project can tolerate, then set the backup schedule accordingly. Ask separately about network attack protection and its limits. Neither an antivirus scan nor the server's country of location guarantees security; regular checks and a clear response procedure are essential.