What action is needed to quickly block suspicious connections on a Security Gateway?

To quickly block suspicious connections on a Security Gateway, utilizing SmartView Monitor and immediately applying a Security Admission Management (SAM) rule is an effective approach. SmartView Monitor provides real-time monitoring of network activities and allows administrators to identify suspicious connections as they occur. By applying a SAM rule directly from this interface, administrators can efficiently respond to potential threats without needing to go through the more time-consuming processes of policy package adjustment or command-line interventions.

This method is advantageous because it offers immediacy in response to threats, enabling security personnel to react swiftly. Additionally, utilizing SAM rules can streamline the blocking of specific connections based on predefined conditions, enhancing network security while minimizing disruption.

The other options involve either waiting for policy changes to take effect or utilizing command-line instructions, which might not provide the immediate impact that SmartView Monitor facilitates. Therefore, leveraging SmartView Monitor for a quick and timely application of SAM rules is the most effective action in this scenario.