Which action is the most effective for improving server security in a bank facing increased cyber threats?

Implementing a secure baseline and adhering to hardening guidelines is the most effective action for improving server security in a bank, especially in the face of increased cyber threats. This practice involves configuring servers based on established security standards that mitigate the risk of exploits and unauthorized access. By creating a secure baseline, the bank can ensure all server configurations are optimized for security, reducing vulnerabilities to common attack vectors.

Hardening guidelines typically include disabling unnecessary services, removing default accounts, applying the principle of least privilege, and ensuring all software is up to date with security patches. These proactive measures create a robust security posture that significantly lowers the chances of a successful cyber attack.

This approach is foundational compared to other options, as it systematically addresses potential weaknesses at the core of the server environment. Organizations that adopt and maintain these practices are better positioned to defend against evolving threats, making it an essential step in a comprehensive cybersecurity strategy.