CHAPTER 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.
1Select Specified address ranges are attached to the LAN link.
2Click Add in the From Address table.
3Enter the range of network IP addresses on the LAN.
4Click OK and then click Apply.
5Click Restart in the Status bar of the management interface. The SonicWALL security appliance restarts and updates the configuration.
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