A prioritized Linux VPS hardening guide covering updates, users, SSH, firewall rules, minimal services, logging, backups and lockout-safe verification.
Updated 7/30/20264 min read
Install from a trusted image, apply updates and disable services the host does not need. Fewer packages and ports mean fewer components to inventory and maintain.
sudo apt update && sudo apt upgrade
sudo ss -tulpn
sudo systemctl --type=service --state=runningRelated guide: VPS backup strategy and restore testing
Use a named account with sudo, key authentication and least privilege. Restrict inbound ports to required services and retain an out-of-band recovery path when available.
Hardening is ongoing. Review authentication logs, configuration changes, ports and update status. Assign ownership and response procedures because forgotten controls decay.
It can reduce automated noise but does not replace keys, least privilege, patching, rate limiting or monitoring. Security must not depend on hiding a port.
It is often appropriate after a tested administrative account with sudo and a recovery path exist. Disabling it before testing alternative access can cause lockout.