A FortiSandbox HA cluster is configured with the MTA adapter. What does the primary node do when it receives MTA jobs? (Choose one answer)

In a FortiSandbox High Availability (HA) cluster, the primary node functions as the central point for receiving and distributing analysis jobs. When an MTA job (an email) arrives at the primary node, it assumes the role of a load balancer. It distributes the job to an available node within the cluster for scanning and analysis. This destination node can be one of the secondary nodes or the primary node itself, based on the current workload of all members. This mechanism ensures efficient utilization of cluster resources and maintains high throughput for mail scanning.

A. It processes all MTA jobs by itself.

This is incorrect because it defeats the purpose of load balancing and resource sharing in an HA cluster.

C. It forwards the MTA jobs to all secondary nodes for scanning.

This is incorrect as it would result in redundant scanning and inefficient use of system resources.

D. It rejects the MTA jobs and sends a redirect to the sender.

This is incorrect. The primary node is the designated entry point for the cluster and is responsible for accepting and distributing jobs, not rejecting them.

1. FortiSandbox 5.0.0 Administration Guide, Page 100, Section: "HA Cluster".

The document states: "In a cluster, one FortiSandbox is the primary (master) unit and the other units are secondary (slave) units. The primary unit receives files for scanning and distributes them to the secondary units and itself for processing." This directly supports that the primary node acts as a distributor to all cluster members, including itself.