Which command can be used to enable a firewall filter rule?

The command that enables a firewall filter rule is designed to modify an existing rule's status within the MikroTik router's firewall configuration. Specifically, using '/ip firewall filter set' followed by the rule number and enabling the rule, as well as adjusting other attributes, allows for comprehensive control over how each specific rule operates.

This command is essential because it allows you to enable or disable multiple attributes of a firewall rule simultaneously, catering to more complex configurations. It can be used to not only enable or disable rules but also to modify their settings without needing to delete and re-add them.

Other commands presented do not function correctly in this context. For instance, simply stating to enable without specifying the rule number or attributes will not yield the desired outcome. Similarly, commands that suggest allowing or activating do not align with the actual syntax or functionality necessary to enable a firewall filter rule in MikroTik's RouterOS. Understanding this principle is crucial for effective network management and security policy enforcement within MikroTik setups.