When running a Linux VPS, security should be your top priority. An unprotected server can easily become a target for brute-force SSH attacks, malware injections, or DDoS floods.
In this article, we’ll cover the best security practices for Linux VPS that every server owner should follow. We’ll also show how Tudcloud VPS solutions can save you time with built-in security hardening and DDoS protection.
1. Disable Root Login
The root account is the first target for attackers. Disabling direct root login reduces brute-force risks.
- Create a new user:
adduser tudcloud usermod -aG sudo tudcloud - Edit SSH configuration:
sudo nano /etc/ssh/sshd_configFind and set:PermitRootLogin no - Restart SSH:
sudo systemctl restart ssh
2. Use SSH Keys Instead of Passwords
Passwords can be cracked. SSH key authentication is far more secure.
- Generate a key locally:
ssh-keygen -t rsa -b 4096 - Copy the public key to your VPS:
ssh-copy-id tudcloud@your-server-ip - Edit SSH configuration to disable passwords:
PasswordAuthentication no - Restart SSH:
sudo systemctl restart ssh
Now, only SSH keys can be used to log in.
3. Change the Default SSH Port
Attackers often scan port 22. Change it to something less obvious, e.g.:
Port 2222
4. Configure a Firewall (UFW / iptables)
Limit access to only necessary ports (e.g., web and SSH):
sudo ufw allow 2222/tcp
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp
sudo ufw enable
5. Install Fail2Ban
Fail2Ban automatically blocks IPs after too many failed login attempts.
sudo apt install fail2ban
sudo systemctl enable fail2ban
sudo systemctl start fail2ban
6. Keep Your System Updated
Always keep your Linux system and packages up to date to patch known vulnerabilities:
sudo apt update && sudo apt upgrade -y
🚀 Tudcloud Secured VPS Solutions
While these steps significantly improve VPS security, some use cases (e-commerce, enterprise apps, game servers) require extra protection.
At Tudcloud, we provide:
- DDoS-protected VPS (Hong Kong CN2, US AS4837, and more locations)
- Pre-secured server templates (root login disabled, SSH keys enabled, firewall configured)
- 24/7 technical support to assist with security incidents
👉 Get your secured VPS today at Tudcloud and focus on your projects while we take care of your server’s safety.
✅ Conclusion
Securing your Linux VPS is critical. Best practices include:
- Disabling root login
- Using SSH keys instead of passwords
- Changing the SSH port
- Configuring firewalls and Fail2Ban
- Regularly updating your system
If you prefer a ready-to-use secured VPS with DDoS protection, Tudcloud has you covered.