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SONICWALL SONICOS STANDARD 3.0 ADMINISTRATOR’S GUIDE
67
Configuring the WAN Interface
Configuring NAT with PPPoE Client
The SonicWALL security appliance can use Point-to-Point Protocol over Ethernet to connect to the
Internet. If your ISP requires the installation of desktop software as well as a user name and
password to access the Internet, enable NAT with PPPoE Client.
1
Select NAT with PPPoE Client from the drop-down menu in the Mode column of the Interfaces
table.
2
Click the edit icon in the WAN entry of the Interfaces table. The WAN Properties window is
displayed.
3
Select Obtain an IP Address Automatically if you do not have a public IP address from your ISP.
If you have an IP address from your ISP, select Use the following Address, and enter the IP
address in the IP address field.
4
Click the PPPoE tab.
5
Enter your user name and password provided by your ISP in the User Name and User Password
fields.
6
Select Inactivity Disconnect (minutes) to end the connection after a specified time of inactivity.
10 minutes is the default value.
7
Click OK.
Configuring NAT with L2TP Client
If your Internet connection is provided through a L2TP server, you must configure the SonicWALL
security appliance to use NAT with L2TP Client. L2TP (Layer 2 Tunneling Protocol) provides
interoperability between VPN vendors that protocols such as Point-to-Point Tunneling Protocol
(PPTP) and Layer 2 Forwarding (L2F) do not have.
1
Log into the SonicWALL security appliance, and click Network.
2
Select NAT with L2TP Client from the Network Addressing Mode menu.
3
Click the edit icon in the WAN entry of the Interfaces table. The WAN Properties window is
displayed.
4
Obtain an IP Address Automatically is selected by default. Enter your host name in the Host
Name field. Click Renew to obtain new IP addressing information. Click Release to discard IP
addressing information. Click Refresh to reload the IP addressing information.
5
If you have IP addressing information, select Use the following IP Address.
6
Enter your public IP address in the SonicWALL WAN IP (NAT Public) Address field.
7
Enter the WAN Subnet information in the WAN Subnet Mask field.
8
Enter the WAN Gateway IP address in the WAN Gateway (Router) Address field.
9
Click on the L2TP tab.
10
Enter your user name in the User Name field.
11
Enter your password in the User Password field.
12
Enter the IP address of the L2TP Server in the L2TP Server IP Address field.
13
Enter the host name of the L2TP Server in the L2TP Host Name field.
14
Select Inactivity Disconnect (minutes) to end the connection after a specified time of inactivity.
15
Once a connection is established, the SonicWALL security appliance WAN IP address, the
Gateway address and the DNS Server IP addresses are displayed in the Settings Acquired via
L2TP section.
16
Click OK.