1. Disable Password Logins & Use SSH Keys
Passwords are highly vulnerable to brute force attacks. Generate a secure SSH Key Pair on your local computer, copy the public key to your VPS, and completely disable password authentication in the SSH daemon configuration file.
2. Change the Default SSH Port
The standard SSH port is **22**. Hacker script bots scan port 22 constantly across IP blocks. Modifying the SSH port to a custom high-range port immediately isolates your server from automated dictionary attacks.
"Disabling password-based SSH logins and using RSA keys is the single most powerful step to securing any Linux-based virtual instance."
3. Configure the UFW Firewall
Deploy a strict local firewall using UFW (Uncomplicated Firewall). Only allow connections to ports required for your services. Lock out all other unauthorized ports.
4. Deploy Fail2Ban Protection
Install **Fail2Ban**, an intrusion prevention framework. Fail2Ban automatically monitors system access logs for failures and deploys temporary IP bans.
- Enable automated security updates for your Linux package manager.
- Disable root user login via SSH; enforce standard users with sudo privileges.
- Audit open network ports regularly using commands like
netstat -tulpn.
Keep your critical applications and corporate databases protected. Deploy on QuickRDP’s KVM VPS networks to get secure Linux VPS hosting packages, featuring enterprise security firewalls, DDR memory isolation, and SSD performance array nodes.
