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10. What security configurations and tools do I need?

Virtual Private Servers (VPS) are favored by many businesses and individual users for their cost-effectiveness and flexibility. However, being connected to the public network also makes them potential targets for hacker attacks. Therefore, ensuring the security and privacy of your VPS is crucial. Here are some basic security configurations and essential tools to help protect your VPS from hacker attacks.

Use Strong Passwords & Multi-Factor Authentication

  • Strong Passwords: Ensure all accounts, especially root or admin accounts, use strong passwords. A strong password should include a combination of uppercase and lowercase letters, numbers, and special characters, and be at least 12 characters long.
  • Multi-Factor Authentication (MFA): Enable MFA for sensitive operations wherever possible. This adds an extra layer of security, making it difficult for unauthorized users to access the system even if the password is compromised.

Install & Configure Firewalls

Use tools such as iptables (Linux) or Windows Firewall to limit unnecessary inbound and outbound traffic. Ensure only necessary ports are open, such as HTTP (80) and HTTPS (443), and block unused ports.

Regularly Update Operating System & Applications

  • Automatic Updates: Keep the operating system and all installed applications up to date.
  • Patch Management: Installing security patches is crucial to prevent exploitation of known vulnerabilities.
  • Security Audit Tools: Regularly conduct security audits with tools like Lynis or ClamAV to find and fix potential security issues.

Use Intrusion Detection Systems & Intrusion Prevention Systems

  • Intrusion Detection Systems (IDS): Such as Snort, can monitor network traffic and alert potential threats based on known attack patterns.
  • Intrusion Prevention Systems (IPS): Such as Fail2Ban, can automatically respond to attacks detected by IDS, for example, by blocking traffic from the attacking source IP.

Implement Strict Access Control

  • Principle of Least Privilege: Provide users and applications only the permissions necessary to perform their tasks. Unnecessary administrative privileges should be restricted.
  • Use SSH Keys: For remote access, use key-based authentication instead of traditional passwords. SSH keys offer higher security than regular passwords.

Data Encryption

  • Transmission Encryption: Use SSL/TLS to encrypt all data transmissions, ensuring that data cannot be intercepted or tampered with during transmission.
  • Storage Encryption: Encrypt sensitive data stored on the VPS so that even if accessed illegally, it cannot be used directly.

Backup & Recovery Plan

  • Regular Backups: Implement a stringent data backup plan, including regular backups of all critical data.
  • Disaster Recovery: Prepare and test a disaster recovery plan to ensure quick restoration of operations in case of data loss or system failure.


In summary, protecting the security and privacy of a VPS requires a series of comprehensive measures. By implementing robust security strategies and using advanced tools, the risk of hacker attacks can be effectively reduced. Remember, security is an ongoing process that requires regular assessment and updating of your security measures to combat the evolving threat landscape.