Dell SonicWALL GX250 Manual page 100

Configuration
Click Advanced on the left side of the browser window, and then click the Intranet
tab at the top of the window.
To enable Intranet firewalling, you must specify which machines are located on the
LAN, or you must specify which machines are located on the WAN.
It is best to select the network area with the least number of machines. For example,
if only one or two machines are connected to the WAN, select Specified address ranges
are attached to the WAN link. That way, you only need to enter one or two IP addresses
in the Add Range section. Specify the IP addresses individually or as a range.
Intranet Settings
Select one of the following three options:
• SonicWALL's WAN link is connected directly to the Internet router
Select this option if the SonicWALL is protecting your entire network. This is the
default setting.
• Specified address ranges are attached to the LAN link
Select this option if it is easier to specify the devices on your LAN. Then enter your
LAN IP address range(s). If you do not include all computers on your LAN, the
computers not included will be unable to send or receive data through the
SonicWALL.
• Specified address ranges are attached to the WAN link
Page 100 ADVANCED FEATURES