Connect one end of an Ethernet cable to your DMZ, either directly to the corresponding port on your existing SonicWall gateway appliance, to a hub, or to a switch on your DMZ.
Connect the other end of the Ethernet cable to the X0 port on your SonicWallSMA 210/410 and 500v. The X0 Port LED lights up indicating an active connection.
Configure the SMA X0 with an IP address in the DMZ subnet. Refer to Configuring the X0 IP Address for more information.