Hardening a Linux server is critical for reducing vulnerabilities and protecting against unauthorized access. Start by disabling unused ports and services to minimize your attack surface. Keep your system updated with the latest security patches. Configure a firewall like UFW or iptables to control inbound and outbound traffic. Implement strong SSH security by using key-based authentication and changing the default port. Set up intrusion detection systems (IDS) and enable logging to monitor suspicious activity. Enforce file permissions and limit user access based on roles. These proactive steps ensure your Linux server remains secure, stable, and resilient against evolving cyber threats.
