What is the default WAN interface on a SonicWall appliance?

The default WAN interface on a SonicWall appliance is indeed X1. This configuration is standard for many models in the SonicWall product line. The X1 interface is specifically designated to connect the appliance to the wide area network (WAN), such as the internet. By default, this setup allows for seamless integration and connectivity right out of the box.

It's important to note that other interfaces like X0 are typically configured as LAN ports, meant for local network connections. As a result, choosing X1 as the default WAN interface supports the expected networking practices, where X1 is utilized for external connectivity while other interfaces are reserved for internal networking needs. This clear designation aids administrators in understanding and managing the network layout effectively.