What happens when the SonicWall Administrator modifies the default LAN -> WAN Access Rule to "Deny"?

When the default LAN to WAN access rule is modified to "Deny," it primarily impacts the traffic flow from the LAN to the WAN, effectively blocking LAN users from accessing the internet. However, the SonicWall appliance itself is still capable of performing essential functions, such as registering with MySonicWall.com. This capability is crucial for maintaining access to support and updates, allowing the appliance to continue operating effectively even when user traffic is restricted.

This configuration ensures that while user-generated traffic is denied, the firewall can still communicate with external services necessary for its operation, such as receiving security updates or maintaining its registration status. This distinction is important because it highlights the difference between user traffic rules and the operational needs of the firewall itself. It ensures that necessary updates can be performed, maintaining the security posture of the device while controlling user access.

In contrast, the other options suggest scenarios that do not accurately reflect the behavior of the firewall when the rule is set to "Deny." The specific outcome of blocking LAN to WAN access while allowing the appliance to register is a more accurate representation of the system's functionality and intent behind access rule configurations.