CentOS 7 Security: Essential Tips

To enhance the security of the CentOS 7 system, the following measures can be taken:

1. Update your system regularly by updating the operating system and security patches to fix known vulnerabilities.
2. Install firewall: Configure firewall rules to restrict network traffic, you can use either firewalld or iptables to set up firewall rules.
3. Disable unnecessary services: Turn off services and ports that are not needed to reduce the system’s attack surface.
4. Configure SELinux: Enable SELinux to enhance system security and restrict process access permissions.
5. Use strong passwords: Implement a complex and strong password policy, and regularly change your password.
6. Enable two-factor authentication: Increase the security of the system by enabling multiple authentication methods such as SSH two-factor authentication and PAM modules.
7. Secure communication using encryption: Set up SSL/TLS protocols to encrypt network communication and safeguard data transfer.
8. Monitoring System: Install monitoring tools to track the real-time operation and security events of the system.
9. Restrict user permissions by assigning them to appropriate user groups to limit their access and permissions.
10. Regularly back up your data: regularly back up system data to prevent data loss or ransomware attacks.