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SONICWALL SONICOS STANDARD 3.0 ADMINISTRATOR’S GUIDE
C
HAPTER
9:
Configuring Network Settings
Configuring the WAN Interface
The Mode menu in the Interfaces table for the WAN interface determines the network address
scheme of your SonicWALL security appliance. It includes six options:
• Transparent Mode enables the SonicWALL security appliance to bridge the WAN subnet onto the
LAN interface. It requires valid IP addresses for all computers on your network, but allows remote
access to authenticated users. Your public WAN IP address is visible to the Internet.
• NAT Enabled mode translates the private IP addresses on the network to the single, valid IP
address of the SonicWALL security appliance. Select NAT Enabled if your ISP assigned you only
one or two valid IP addresses.
• NAT with DHCP Client mode configures the SonicWALL security appliance to request IP settings
from a DHCP server on the Internet. NAT with DHCP Client is a typical network addressing mode
for cable and DSL customers.
• NAT with PPPoE mode uses PPPoE to connect to the Internet. If desktop software and a user
name and password is required by your ISP, select NAT with PPPoE.
• NAT with L2TP Client mode uses IPSec to connect a L2TP server and encrypts all data transmit-
ted from the client to the server. However, it does not encrypt network traffic to other destinations.
• NAT with PPTP Client mode uses Point to Point Tunneling Protocol (PPTP) to connect to a
remote server. It supports older Microsoft implementations requiring tunneling connectivity.
Configuring Transparent Mode
Transparent Mode requires valid IP addresses for all computers on your network, and allows remote
access to authenticated users. Your public WAN IP address is visible to the Internet. To enable
Transparent Mode, select Transparent Mode from the Mode menu. The WAN and LAN IP addresses
are now identical. To complete the configuration, click Intranet in the Network menu list.
1
Select Specified address ranges are attached to the LAN link.
2
Click Add in the From Address table.
3
Enter the range of network IP addresses on the LAN.
4
Click OK and then click Apply.
5
Click Restart in the Status bar of the management interface. The SonicWALL security appliance
restarts and updates the configuration.