The moment a new Linux VPS is online with a public IP, it is immediately bombarded by botnets. Server security is the absolute first step in deployment.
The Security Checklist
1. Disable Password Authentication
SSH public key authentication is essential. Generate an Ed25519 keypair, upload the public key, and set PasswordAuthentication no in sshd_config.
2. Change the Default SSH Port
Changing from port 22 to a random port dramatically reduces log spam from automated scanners.
3. Install Fail2Ban
Fail2Ban monitors log files for suspicious activity and bans offending IPs automatically.
4. Set Up UFW Firewall
Deny all incoming, allow all outgoing. Only open necessary ports:
ufw default deny incoming\nufw allow 53211/tcp\nufw allow 80/tcp\nufw allow 443/tcp\nufw enable5. Automate Security Updates
Enable unattended-upgrades to ensure critical patches are applied automatically.
Related Providers
All providers on our comparison page offer full root access for implementing these security measures. RockHoster includes DDoS protection by default.
Conclusion
Server security is an ongoing process. By implementing these practices on day one, you establish an impenetrable fortress for your applications.
