Which of the following is NOT a recommended best practice when setting up a firewall rule?

The correct answer highlights a common misconception regarding firewall configurations. Leaving all options enabled in a firewall rule is generally not considered a best practice because it can lead to unnecessary vulnerabilities and excessive risk. This approach undermines the principle of least privilege, in which you only allow the minimum permissions necessary for users and data to function effectively.

By enabling only the specific protocols, ports, or attributes required for operations, the firewall minimizes exposure to potential attacks. This focused approach helps in maintaining a robust security posture and reduces the attack surface area.

In contrast, best practices such as using the least privilege principle, regularly reviewing and updating rules, and documenting rule changes are designed to strengthen security and provide clarity on existing configurations. These practices encourage proactive management of firewall settings and ensure that security measures remain relevant and effective over time.