True or False: Denying LAN to WAN will prevent the check network setting Test MySonicWall.com.

Denying LAN to WAN traffic effectively restricts communication from your internal network to the external network. When this type of traffic is denied, users on the LAN will not be able to access resources or services available on the WAN, which includes the check network setting feature of Test MySonicWall.com. This is crucial because Test MySonicWall.com requires connectivity to perform its functionality; if traffic is blocked, the tests and verifications it provides cannot be executed successfully.

Thus, by denying LAN to WAN, you are indeed preventing any communication required for utilizing that feature, making the statement true. This aligns with principles of network management where appropriate access controls directly affect functionality related to external diagnostic tools or services.