How to Secure a VPS Right After Deployment – Checklist for 2025 – HostEONS – Best VPS, Dedicated Servers and Web Hosting

Deploying a VPS is the first step to building your online presence, hosting applications, or running business-critical services. But if you don’t secure it immediately after deployment, your server could become an easy target for hackers and automated bots.

Here’s a step-by-step security checklist for 2025 to harden your VPS from the start.

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1. Update Your System

Outdated packages and kernels are the biggest vulnerabilities.

Run these commands right after login:

sudo apt update && sudo apt upgrade -y   # For Ubuntu/Debian
sudo dnf update -y                      # For CentOS/AlmaLinux

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2. Create a New User and Disable Root Login

Never use the root account for day-to-day operations.

adduser youruser
usermod -aG sudo youruser

Edit the SSH configuration:

sudo nano /etc/ssh/sshd_config

Change:

PermitRootLogin no

Restart SSH:

systemctl restart ssh

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3. Set Up SSH Key Authentication

Passwords can be brute-forced. Use SSH keys instead.

Generate keys on your local machine:

ssh-keygen -t rsa -b 4096

Copy your public key to the VPS:

ssh-copy-id youruser@server_ip

Disable password login in /etc/ssh/sshd_config:

PasswordAuthentication no

Restart SSH again.

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4. Change the Default SSH Port

Bots scan port 22 for vulnerabilities. Change it to a non-standard port (e.g., 2222):

sudo nano /etc/ssh/sshd_config

Set:

Port 2222

Restart SSH:

systemctl restart ssh

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5. Enable a Firewall

Use UFW for Ubuntu/Debian:

sudo ufw allow 2222/tcp
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp
sudo ufw enable

For CentOS/AlmaLinux (Firewalld):

sudo firewall-cmd --add-service=ssh --permanent
sudo firewall-cmd --add-service=http --permanent
sudo firewall-cmd --add-service=https --permanent
sudo firewall-cmd --reload

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6. Install Fail2Ban

Protect against brute-force attacks:

sudo apt install fail2ban -y    # Debian/Ubuntu
sudo dnf install fail2ban -y    # CentOS/AlmaLinux

Enable and start Fail2Ban:

sudo systemctl enable fail2ban
sudo systemctl start fail2ban

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7. Disable Unnecessary Services

Check running services:

systemctl list-unit-files --type=service --state=enabled

Disable what you don’t need:

sudo systemctl disable service_name

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8. Enable Automatic Security Updates

On Ubuntu/Debian:

sudo apt install unattended-upgrades -y

On CentOS/AlmaLinux:

sudo dnf install dnf-automatic -y
sudo systemctl enable --now dnf-automatic.timer

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9. Install a Malware Scanner

Use ClamAV for basic malware scanning:

sudo apt install clamav -y

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10. Backup Regularly

Security is not complete without backups. Use tools like:

rsync
rclone
Cloud backups from your Hosteons VPS panel

Pro Tip:

Hosteons offers an Initial VPS Setup Script that secures your server instantly with best practices:

👉 GitHub Script

👉 Full Guide

Final Thoughts

Securing your VPS should never be an afterthought. With these 10 steps, you can minimize vulnerabilities and keep your server safe from evolving cyber threats in 2025.

🛡️ Ready to get started?

Order a reliable VPS now: Hosteons VPS Plans

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