Shared Linux VPS is the crowned king of hosting solutions, offering excellent performance, ample storage, robust power, and high reliability—all at minimal cost. However, with great power comes great responsibility; a VPS must be kept safe and secure. In this post, we’ll share essential tips for securing your server.
Table of Contents
Secure Passwords
The first line of defense in securing your Shared Linux VPS is setting a strong username and password. Many users overlook the importance of this step, but weak credentials can be hacked in seconds. A strong password should include a mix of upper and lower-case letters, special characters, and numbers. Avoid using easily guessable information such as birthdays, common phrases, or simple patterns like “12345” or “password.” Implementing two-factor authentication (2FA) is even better, as it adds an extra layer of security by requiring a second form of verification, typically a code sent to your phone or generated by an app.
Root Logins
Shared Linux VPS servers typically offer root user logins, a feature that hackers often exploit. The root account has unrestricted access to all commands and files on the system, making it a prime target for brute-force attacks. Most brute force attacks begin by trying the default username “root.” To enhance security, disable root login and create a new admin user with a unique username. This basic measure can greatly lower the chance of unauthorized entry. Additionally, you can change the default port for SSH (usually port 22) to a non-standard port, further decreasing the chances of automated attacks.
Firewall
A properly configured firewall is crucial for protecting your server from unauthorized access. Firewalls act as a barrier between your server and potential threats, detecting and blocking malicious traffic. Tools like iptables, UFW (Uncomplicated Firewall), or Firewalld can help you set up and manage firewall rules. Ensure that only essential ports are open, and block all others. Regularly review and update your firewall rules to adapt to new security challenges.
Keep OS Updated
Keeping your operating system updated is one of the most critical steps in maintaining a secure server. Linux distributions frequently release updates that patch known vulnerabilities. Failing to apply these updates leaves your server exposed to potential exploits. Use a package manager like apt for Debian-based systems or yum for Red Hat-based systems to keep your system up to date. Automating updates can help ensure that your server always has the latest security patches.
Create SSH Keys
While strong passwords are essential, SSH keys provide an even higher level of security. SSH keys are cryptographic keys used to authenticate access to your server. They consist of a public key, which is stored on the server, and a private key, which is kept on your local machine. The public key can be shared freely, while the private key must be kept secure. When you log in using an SSH key, the server verifies the key pair, allowing access only if they match. This method is far more secure than password-based authentication, as it is nearly impossible to crack an SSH key through brute force attacks.
Uninstall Unnecessary Applications/Files
A lean server is a secure server. Only install necessary applications and services to minimize potential attack vectors. Unneeded applications can introduce vulnerabilities and increase the risk of exploitation. Regularly audit your installed software to ensure that each application serves a specific purpose. If you find redundant or obsolete software, uninstall it immediately. This practice not only enhances security but also improves server performance and stability.
Disable Unused Ports
Every open port on your server is a potential entry point for cybercriminals. Hackers constantly scan for open ports to exploit vulnerabilities. Use a firewall to block all ports by default and only open the ones you need. Tools like Nmap can help you identify open ports on your server. Configure your firewall to block the rest once you have identified the necessary ports. Regularly review your port configurations to adapt to changing security needs.
Backups
Regular backups are essential for disaster recovery. In the event of a cyberattack, hardware failure, or human error, a recent backup can significantly reduce downtime and data loss. Schedule automatic backups to ensure you always have an up-to-date copy of your data. Store backups in a secure, remote location to protect against local incidents. bodHOST offers a robust remote backup solution that encrypts and inspects your data for security. This service allows you to schedule automatic backups, providing peace of mind and quick recovery in case of an emergency.
Additional Security Measures
Besides the essential tips mentioned above, consider implementing the following additional security measures:
– Intrusion Detection Systems (IDS): Tools like fail2ban or OSSEC can help monitor your server for suspicious activity and automatically respond to potential threats.
– Regular Security Audits: Perform routine security audits to detect and resolve vulnerabilities. Use tools like Lynis or OpenVAS to perform comprehensive security assessments.
– Access Control: Limit the number of users with administrative privileges. Use the principle of least privilege (PoLP) to grant users only the access they need to perform their tasks.
– Encrypted Communications: Ensure that all data transmitted between your server and clients is encrypted using protocols like HTTPS and SSL/TLS. This protects sensitive information from being intercepted during transmission.
Conclusion
A Shared Linux VPS is an excellent choice for growing businesses, but it must be protected from cyberattacks. By following these tips, you can secure your server and reduce the risk of unauthorized access. With the right web host provider, many security measures will be managed on your behalf, and customer support will be available 24/7 to assist with any issues. For managed Shared Linux VPS hosting, visit our Linux VPS page. Remember, maintaining a secure server is an ongoing process that requires vigilance and regular updates. Stay informed about the latest security practices and continuously improve your server’s defenses to ensure its safety and reliability.
